./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-optional-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-optional-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY --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 1c592bb1d39faa1e5f3d20603a8bfbb8fe6cff4de59ea35fafbddd50b8917b41 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:04:35,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:04:35,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:04:35,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:04:35,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:04:35,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:04:35,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:04:35,838 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:04:35,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:04:35,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:04:35,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:04:35,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:04:35,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:04:35,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:04:35,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:04:35,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:04:35,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:04:35,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:04:35,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:04:35,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:04:35,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:04:35,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:04:35,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:04:35,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:04:35,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:04:35,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:04:35,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:04:35,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:04:35,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:04:35,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:04:35,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:04:35,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:04:35,901 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:04:35,909 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:04:35,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:04:35,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:04:35,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:04:35,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:04:35,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:04:35,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:04:35,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:04:35,916 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-07 08:04:35,971 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:04:35,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:04:35,975 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:04:35,975 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:04:35,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:04:35,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:04:35,977 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:04:35,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:04:35,978 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:04:35,979 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 08:04:35,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:04:35,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:04:35,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:04:35,981 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 08:04:35,981 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 08:04:35,981 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 08:04:35,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:04:35,982 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 08:04:35,982 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:04:35,982 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:04:35,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:04:35,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:04:35,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:04:35,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:04:35,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:04:35,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:04:35,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:04:35,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:04:35,985 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:04:35,985 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_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c592bb1d39faa1e5f3d20603a8bfbb8fe6cff4de59ea35fafbddd50b8917b41 [2021-11-07 08:04:36,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:04:36,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:04:36,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:04:36,296 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:04:36,297 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:04:36,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/forester-heap/dll-optional-1.i [2021-11-07 08:04:36,366 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/data/eb2ad153d/3e92c35f421c48579ff7ceb070b0ce90/FLAG9a5ff476f [2021-11-07 08:04:36,936 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:04:36,936 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/sv-benchmarks/c/forester-heap/dll-optional-1.i [2021-11-07 08:04:36,959 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/data/eb2ad153d/3e92c35f421c48579ff7ceb070b0ce90/FLAG9a5ff476f [2021-11-07 08:04:37,248 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/data/eb2ad153d/3e92c35f421c48579ff7ceb070b0ce90 [2021-11-07 08:04:37,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:04:37,252 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 08:04:37,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:04:37,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:04:37,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:04:37,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:04:37" (1/1) ... [2021-11-07 08:04:37,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bbb7706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:37, skipping insertion in model container [2021-11-07 08:04:37,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:04:37" (1/1) ... [2021-11-07 08:04:37,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:04:37,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:04:37,708 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/sv-benchmarks/c/forester-heap/dll-optional-1.i[22753,22766] [2021-11-07 08:04:37,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:04:37,728 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:04:37,767 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/sv-benchmarks/c/forester-heap/dll-optional-1.i[22753,22766] [2021-11-07 08:04:37,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:04:37,800 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:04:37,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:37 WrapperNode [2021-11-07 08:04:37,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:04:37,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:04:37,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:04:37,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:04:37,816 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:37" (1/1) ... [2021-11-07 08:04:37,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:37" (1/1) ... [2021-11-07 08:04:37,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:37" (1/1) ... [2021-11-07 08:04:37,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:37" (1/1) ... [2021-11-07 08:04:37,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:37" (1/1) ... [2021-11-07 08:04:37,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:37" (1/1) ... [2021-11-07 08:04:37,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:37" (1/1) ... [2021-11-07 08:04:37,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:04:37,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:04:37,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:04:37,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:04:37,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:37" (1/1) ... [2021-11-07 08:04:37,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:04:37,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:37,928 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:04:37,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:04:37,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-07 08:04:37,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:04:37,982 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-07 08:04:37,983 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-07 08:04:37,984 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-07 08:04:37,985 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-07 08:04:37,985 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-07 08:04:37,985 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-07 08:04:37,985 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-07 08:04:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-07 08:04:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-07 08:04:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-07 08:04:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-07 08:04:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-07 08:04:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-07 08:04:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-07 08:04:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-07 08:04:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-07 08:04:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-07 08:04:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-07 08:04:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-07 08:04:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-07 08:04:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-07 08:04:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-07 08:04:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-07 08:04:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-07 08:04:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-07 08:04:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-07 08:04:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-07 08:04:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-07 08:04:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-07 08:04:37,991 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-07 08:04:37,991 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-07 08:04:37,991 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-07 08:04:37,991 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-07 08:04:37,991 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-07 08:04:37,992 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-07 08:04:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-07 08:04:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-07 08:04:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-07 08:04:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-07 08:04:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-07 08:04:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-07 08:04:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-07 08:04:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-07 08:04:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-07 08:04:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-07 08:04:37,995 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-07 08:04:37,995 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-07 08:04:37,996 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-07 08:04:37,996 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-07 08:04:37,997 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-07 08:04:37,997 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-07 08:04:37,997 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-07 08:04:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-07 08:04:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-07 08:04:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-07 08:04:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-07 08:04:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-07 08:04:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-07 08:04:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-07 08:04:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-07 08:04:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-07 08:04:38,000 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-07 08:04:38,000 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-07 08:04:38,000 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-07 08:04:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-07 08:04:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-07 08:04:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-07 08:04:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-07 08:04:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-07 08:04:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-07 08:04:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-07 08:04:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-07 08:04:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-07 08:04:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-07 08:04:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-07 08:04:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-07 08:04:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-07 08:04:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-07 08:04:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-07 08:04:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-07 08:04:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-07 08:04:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-07 08:04:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-07 08:04:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-07 08:04:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-07 08:04:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-07 08:04:38,007 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-07 08:04:38,007 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-07 08:04:38,007 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-07 08:04:38,007 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-07 08:04:38,007 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-07 08:04:38,008 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-07 08:04:38,008 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-07 08:04:38,008 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-07 08:04:38,008 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-07 08:04:38,008 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-07 08:04:38,009 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-07 08:04:38,009 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-07 08:04:38,009 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-07 08:04:38,009 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-07 08:04:38,009 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-07 08:04:38,009 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-07 08:04:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-07 08:04:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-07 08:04:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-07 08:04:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-07 08:04:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-07 08:04:38,012 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-07 08:04:38,012 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-07 08:04:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-07 08:04:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:04:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-07 08:04:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 08:04:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 08:04:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:04:38,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 08:04:38,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:04:38,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:04:38,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-07 08:04:38,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:04:38,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:04:38,826 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:04:38,835 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-07 08:04:38,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:04:38 BoogieIcfgContainer [2021-11-07 08:04:38,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:04:38,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:04:38,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:04:38,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:04:38,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:04:37" (1/3) ... [2021-11-07 08:04:38,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bbaf8d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:04:38, skipping insertion in model container [2021-11-07 08:04:38,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:37" (2/3) ... [2021-11-07 08:04:38,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bbaf8d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:04:38, skipping insertion in model container [2021-11-07 08:04:38,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:04:38" (3/3) ... [2021-11-07 08:04:38,849 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-optional-1.i [2021-11-07 08:04:38,855 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:04:38,855 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2021-11-07 08:04:38,899 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:04:38,906 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 [2021-11-07 08:04:38,906 INFO L340 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2021-11-07 08:04:38,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 153 states have internal predecessors, (170), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 08:04:38,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 08:04:38,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:38,935 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:38,935 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:38,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:38,942 INFO L85 PathProgramCache]: Analyzing trace with hash 2128307418, now seen corresponding path program 1 times [2021-11-07 08:04:38,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:38,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510153614] [2021-11-07 08:04:38,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:38,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:39,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:39,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:39,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510153614] [2021-11-07 08:04:39,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510153614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:39,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:39,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:04:39,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209134328] [2021-11-07 08:04:39,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:04:39,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:39,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:04:39,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:04:39,303 INFO L87 Difference]: Start difference. First operand has 158 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 153 states have internal predecessors, (170), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:39,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:39,743 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2021-11-07 08:04:39,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:04:39,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-07 08:04:39,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:39,760 INFO L225 Difference]: With dead ends: 158 [2021-11-07 08:04:39,761 INFO L226 Difference]: Without dead ends: 154 [2021-11-07 08:04:39,763 INFO L786 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 [2021-11-07 08:04:39,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-07 08:04:39,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2021-11-07 08:04:39,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 83 states have (on average 1.891566265060241) internal successors, (157), 144 states have internal predecessors, (157), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:39,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 160 transitions. [2021-11-07 08:04:39,854 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 160 transitions. Word has length 7 [2021-11-07 08:04:39,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:39,855 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 160 transitions. [2021-11-07 08:04:39,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:39,855 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 160 transitions. [2021-11-07 08:04:39,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 08:04:39,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:39,856 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:39,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:04:39,856 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:39,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:39,857 INFO L85 PathProgramCache]: Analyzing trace with hash 2128307419, now seen corresponding path program 1 times [2021-11-07 08:04:39,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:39,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657870475] [2021-11-07 08:04:39,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:39,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:39,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:39,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:39,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657870475] [2021-11-07 08:04:39,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657870475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:39,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:39,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:04:39,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344616511] [2021-11-07 08:04:39,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:04:39,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:39,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:04:39,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:04:39,952 INFO L87 Difference]: Start difference. First operand 148 states and 160 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:40,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:40,243 INFO L93 Difference]: Finished difference Result 143 states and 155 transitions. [2021-11-07 08:04:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:04:40,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-07 08:04:40,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:40,245 INFO L225 Difference]: With dead ends: 143 [2021-11-07 08:04:40,245 INFO L226 Difference]: Without dead ends: 143 [2021-11-07 08:04:40,246 INFO L786 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 [2021-11-07 08:04:40,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-07 08:04:40,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2021-11-07 08:04:40,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 83 states have (on average 1.783132530120482) internal successors, (148), 135 states have internal predecessors, (148), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 151 transitions. [2021-11-07 08:04:40,257 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 151 transitions. Word has length 7 [2021-11-07 08:04:40,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:40,258 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 151 transitions. [2021-11-07 08:04:40,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:40,258 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 151 transitions. [2021-11-07 08:04:40,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 08:04:40,259 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:40,259 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:40,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:04:40,260 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:40,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:40,260 INFO L85 PathProgramCache]: Analyzing trace with hash -536268575, now seen corresponding path program 1 times [2021-11-07 08:04:40,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:40,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042063090] [2021-11-07 08:04:40,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:40,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:40,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:40,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:40,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042063090] [2021-11-07 08:04:40,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042063090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:40,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:40,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:04:40,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48256310] [2021-11-07 08:04:40,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:04:40,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:40,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:04:40,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:04:40,399 INFO L87 Difference]: Start difference. First operand 139 states and 151 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:40,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:40,763 INFO L93 Difference]: Finished difference Result 183 states and 200 transitions. [2021-11-07 08:04:40,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:04:40,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-07 08:04:40,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:40,765 INFO L225 Difference]: With dead ends: 183 [2021-11-07 08:04:40,765 INFO L226 Difference]: Without dead ends: 183 [2021-11-07 08:04:40,766 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:04:40,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-07 08:04:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2021-11-07 08:04:40,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 83 states have (on average 1.7710843373493976) internal successors, (147), 134 states have internal predecessors, (147), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 150 transitions. [2021-11-07 08:04:40,775 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 150 transitions. Word has length 16 [2021-11-07 08:04:40,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:40,776 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 150 transitions. [2021-11-07 08:04:40,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:40,776 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 150 transitions. [2021-11-07 08:04:40,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 08:04:40,777 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:40,777 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:40,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:04:40,777 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:40,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:40,778 INFO L85 PathProgramCache]: Analyzing trace with hash -536268574, now seen corresponding path program 1 times [2021-11-07 08:04:40,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:40,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049374017] [2021-11-07 08:04:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:40,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:40,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:40,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:40,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049374017] [2021-11-07 08:04:40,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049374017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:40,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:40,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:04:40,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894422600] [2021-11-07 08:04:40,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:04:40,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:40,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:04:40,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:04:40,892 INFO L87 Difference]: Start difference. First operand 138 states and 150 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:41,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:41,212 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2021-11-07 08:04:41,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:04:41,213 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-07 08:04:41,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:41,214 INFO L225 Difference]: With dead ends: 137 [2021-11-07 08:04:41,214 INFO L226 Difference]: Without dead ends: 137 [2021-11-07 08:04:41,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:04:41,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-07 08:04:41,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-07 08:04:41,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 83 states have (on average 1.7590361445783131) internal successors, (146), 133 states have internal predecessors, (146), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:41,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 149 transitions. [2021-11-07 08:04:41,223 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 149 transitions. Word has length 16 [2021-11-07 08:04:41,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:41,223 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 149 transitions. [2021-11-07 08:04:41,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:41,224 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 149 transitions. [2021-11-07 08:04:41,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 08:04:41,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:41,225 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:41,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:04:41,225 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr20REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:41,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:41,226 INFO L85 PathProgramCache]: Analyzing trace with hash 306357193, now seen corresponding path program 1 times [2021-11-07 08:04:41,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:41,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150068398] [2021-11-07 08:04:41,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:41,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:41,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:41,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:41,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150068398] [2021-11-07 08:04:41,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150068398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:41,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:41,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:04:41,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221751510] [2021-11-07 08:04:41,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:04:41,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:41,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:04:41,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:04:41,314 INFO L87 Difference]: Start difference. First operand 137 states and 149 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:41,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:41,632 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2021-11-07 08:04:41,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:04:41,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-07 08:04:41,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:41,634 INFO L225 Difference]: With dead ends: 138 [2021-11-07 08:04:41,634 INFO L226 Difference]: Without dead ends: 138 [2021-11-07 08:04:41,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:04:41,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-07 08:04:41,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2021-11-07 08:04:41,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 89 states have (on average 1.6067415730337078) internal successors, (143), 125 states have internal predecessors, (143), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:41,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 146 transitions. [2021-11-07 08:04:41,640 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 146 transitions. Word has length 17 [2021-11-07 08:04:41,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:41,640 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 146 transitions. [2021-11-07 08:04:41,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:41,641 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 146 transitions. [2021-11-07 08:04:41,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 08:04:41,641 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:41,641 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:41,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:04:41,642 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr21REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:41,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:41,642 INFO L85 PathProgramCache]: Analyzing trace with hash 306357194, now seen corresponding path program 1 times [2021-11-07 08:04:41,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:41,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742441529] [2021-11-07 08:04:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:41,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:41,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:41,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:41,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742441529] [2021-11-07 08:04:41,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742441529] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:41,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:41,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:04:41,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478212287] [2021-11-07 08:04:41,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:04:41,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:41,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:04:41,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:04:41,768 INFO L87 Difference]: Start difference. First operand 129 states and 146 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:42,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:42,050 INFO L93 Difference]: Finished difference Result 166 states and 184 transitions. [2021-11-07 08:04:42,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:04:42,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-07 08:04:42,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:42,055 INFO L225 Difference]: With dead ends: 166 [2021-11-07 08:04:42,056 INFO L226 Difference]: Without dead ends: 166 [2021-11-07 08:04:42,056 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:04:42,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-07 08:04:42,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 153. [2021-11-07 08:04:42,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 113 states have (on average 1.5398230088495575) internal successors, (174), 149 states have internal predecessors, (174), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:42,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 177 transitions. [2021-11-07 08:04:42,062 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 177 transitions. Word has length 17 [2021-11-07 08:04:42,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:42,062 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 177 transitions. [2021-11-07 08:04:42,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:42,063 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 177 transitions. [2021-11-07 08:04:42,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 08:04:42,063 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:42,064 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:42,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:04:42,064 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:42,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:42,065 INFO L85 PathProgramCache]: Analyzing trace with hash -118328575, now seen corresponding path program 1 times [2021-11-07 08:04:42,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:42,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146883951] [2021-11-07 08:04:42,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:42,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:42,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:42,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:42,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146883951] [2021-11-07 08:04:42,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146883951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:42,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:42,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:04:42,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532016216] [2021-11-07 08:04:42,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:04:42,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:42,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:04:42,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:04:42,181 INFO L87 Difference]: Start difference. First operand 153 states and 177 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:42,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:42,482 INFO L93 Difference]: Finished difference Result 152 states and 175 transitions. [2021-11-07 08:04:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:04:42,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-07 08:04:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:42,484 INFO L225 Difference]: With dead ends: 152 [2021-11-07 08:04:42,484 INFO L226 Difference]: Without dead ends: 152 [2021-11-07 08:04:42,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:04:42,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-07 08:04:42,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-11-07 08:04:42,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 113 states have (on average 1.5221238938053097) internal successors, (172), 148 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:42,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 175 transitions. [2021-11-07 08:04:42,489 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 175 transitions. Word has length 20 [2021-11-07 08:04:42,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:42,490 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 175 transitions. [2021-11-07 08:04:42,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:42,490 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 175 transitions. [2021-11-07 08:04:42,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 08:04:42,491 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:42,491 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:42,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:04:42,491 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:42,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:42,492 INFO L85 PathProgramCache]: Analyzing trace with hash -118328574, now seen corresponding path program 1 times [2021-11-07 08:04:42,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:42,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326022541] [2021-11-07 08:04:42,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:42,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:42,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:42,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:42,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326022541] [2021-11-07 08:04:42,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326022541] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:42,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:42,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:04:42,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773761344] [2021-11-07 08:04:42,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:04:42,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:42,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:04:42,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:04:42,594 INFO L87 Difference]: Start difference. First operand 152 states and 175 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:42,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:42,902 INFO L93 Difference]: Finished difference Result 151 states and 173 transitions. [2021-11-07 08:04:42,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:04:42,903 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-07 08:04:42,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:42,904 INFO L225 Difference]: With dead ends: 151 [2021-11-07 08:04:42,904 INFO L226 Difference]: Without dead ends: 151 [2021-11-07 08:04:42,905 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:04:42,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-07 08:04:42,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-11-07 08:04:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 113 states have (on average 1.5044247787610618) internal successors, (170), 147 states have internal predecessors, (170), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:42,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 173 transitions. [2021-11-07 08:04:42,910 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 173 transitions. Word has length 20 [2021-11-07 08:04:42,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:42,910 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 173 transitions. [2021-11-07 08:04:42,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:42,911 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 173 transitions. [2021-11-07 08:04:42,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 08:04:42,912 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:42,912 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:42,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:04:42,912 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr71ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:42,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:42,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2038755480, now seen corresponding path program 1 times [2021-11-07 08:04:42,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:42,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769227284] [2021-11-07 08:04:42,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:42,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:42,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:42,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:42,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769227284] [2021-11-07 08:04:42,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769227284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:42,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:42,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:04:42,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988215285] [2021-11-07 08:04:42,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:04:42,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:42,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:04:42,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:04:42,982 INFO L87 Difference]: Start difference. First operand 151 states and 173 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:43,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:43,215 INFO L93 Difference]: Finished difference Result 180 states and 200 transitions. [2021-11-07 08:04:43,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:04:43,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-07 08:04:43,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:43,216 INFO L225 Difference]: With dead ends: 180 [2021-11-07 08:04:43,217 INFO L226 Difference]: Without dead ends: 180 [2021-11-07 08:04:43,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:04:43,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-07 08:04:43,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 151. [2021-11-07 08:04:43,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 113 states have (on average 1.4867256637168142) internal successors, (168), 147 states have internal predecessors, (168), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:43,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 171 transitions. [2021-11-07 08:04:43,222 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 171 transitions. Word has length 22 [2021-11-07 08:04:43,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:43,222 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 171 transitions. [2021-11-07 08:04:43,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:43,231 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 171 transitions. [2021-11-07 08:04:43,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 08:04:43,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:43,233 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:43,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:04:43,234 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:43,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:43,235 INFO L85 PathProgramCache]: Analyzing trace with hash -2069583293, now seen corresponding path program 1 times [2021-11-07 08:04:43,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:43,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056437912] [2021-11-07 08:04:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:43,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:43,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:43,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:43,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056437912] [2021-11-07 08:04:43,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056437912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:43,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:43,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 08:04:43,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95142782] [2021-11-07 08:04:43,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:04:43,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:43,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:04:43,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:04:43,465 INFO L87 Difference]: Start difference. First operand 151 states and 171 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:44,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:44,023 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2021-11-07 08:04:44,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:04:44,024 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-07 08:04:44,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:44,025 INFO L225 Difference]: With dead ends: 153 [2021-11-07 08:04:44,025 INFO L226 Difference]: Without dead ends: 153 [2021-11-07 08:04:44,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:04:44,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-07 08:04:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2021-11-07 08:04:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 113 states have (on average 1.4778761061946903) internal successors, (167), 146 states have internal predecessors, (167), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2021-11-07 08:04:44,031 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 24 [2021-11-07 08:04:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:44,031 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2021-11-07 08:04:44,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2021-11-07 08:04:44,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 08:04:44,033 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:44,033 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:44,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:04:44,034 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr29REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:44,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:44,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2069583292, now seen corresponding path program 1 times [2021-11-07 08:04:44,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:44,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666077927] [2021-11-07 08:04:44,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:44,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:44,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:44,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:44,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666077927] [2021-11-07 08:04:44,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666077927] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:44,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:44,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 08:04:44,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269379004] [2021-11-07 08:04:44,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:04:44,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:44,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:04:44,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:04:44,233 INFO L87 Difference]: Start difference. First operand 150 states and 170 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:44,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:44,993 INFO L93 Difference]: Finished difference Result 144 states and 161 transitions. [2021-11-07 08:04:44,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 08:04:44,994 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-07 08:04:44,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:44,995 INFO L225 Difference]: With dead ends: 144 [2021-11-07 08:04:44,995 INFO L226 Difference]: Without dead ends: 144 [2021-11-07 08:04:44,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:04:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-07 08:04:45,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 131. [2021-11-07 08:04:45,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 105 states have (on average 1.4) internal successors, (147), 127 states have internal predecessors, (147), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:45,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2021-11-07 08:04:45,001 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 24 [2021-11-07 08:04:45,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:45,002 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2021-11-07 08:04:45,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:45,002 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2021-11-07 08:04:45,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 08:04:45,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:45,004 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:45,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 08:04:45,004 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:45,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:45,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1803961082, now seen corresponding path program 1 times [2021-11-07 08:04:45,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:45,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258542900] [2021-11-07 08:04:45,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:45,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:45,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:45,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:45,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258542900] [2021-11-07 08:04:45,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258542900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:45,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:45,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:04:45,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974258863] [2021-11-07 08:04:45,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:04:45,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:45,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:04:45,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:04:45,057 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:45,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:45,220 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2021-11-07 08:04:45,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:04:45,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-11-07 08:04:45,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:45,234 INFO L225 Difference]: With dead ends: 157 [2021-11-07 08:04:45,235 INFO L226 Difference]: Without dead ends: 157 [2021-11-07 08:04:45,235 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:04:45,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-07 08:04:45,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 135. [2021-11-07 08:04:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 109 states have (on average 1.385321100917431) internal successors, (151), 131 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:45,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 154 transitions. [2021-11-07 08:04:45,254 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 154 transitions. Word has length 25 [2021-11-07 08:04:45,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:45,254 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 154 transitions. [2021-11-07 08:04:45,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:45,255 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 154 transitions. [2021-11-07 08:04:45,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 08:04:45,260 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:45,260 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:45,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 08:04:45,261 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:45,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:45,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1497737079, now seen corresponding path program 1 times [2021-11-07 08:04:45,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:45,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711658711] [2021-11-07 08:04:45,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:45,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:45,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:45,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:45,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711658711] [2021-11-07 08:04:45,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711658711] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:45,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:45,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:04:45,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369395615] [2021-11-07 08:04:45,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:04:45,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:45,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:04:45,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:04:45,386 INFO L87 Difference]: Start difference. First operand 135 states and 154 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:45,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:45,939 INFO L93 Difference]: Finished difference Result 268 states and 312 transitions. [2021-11-07 08:04:45,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 08:04:45,939 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-11-07 08:04:45,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:45,941 INFO L225 Difference]: With dead ends: 268 [2021-11-07 08:04:45,942 INFO L226 Difference]: Without dead ends: 268 [2021-11-07 08:04:45,942 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:04:45,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-07 08:04:45,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 145. [2021-11-07 08:04:45,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 119 states have (on average 1.3697478991596639) internal successors, (163), 141 states have internal predecessors, (163), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2021-11-07 08:04:45,949 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 27 [2021-11-07 08:04:45,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:45,950 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2021-11-07 08:04:45,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:45,950 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2021-11-07 08:04:45,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 08:04:45,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:45,951 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:45,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:04:45,952 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr56ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:45,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:45,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1551563773, now seen corresponding path program 1 times [2021-11-07 08:04:45,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:45,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822931779] [2021-11-07 08:04:45,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:45,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:45,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:45,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:46,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822931779] [2021-11-07 08:04:46,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822931779] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:46,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:46,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:04:46,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365396617] [2021-11-07 08:04:46,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:04:46,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:46,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:04:46,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:04:46,002 INFO L87 Difference]: Start difference. First operand 145 states and 166 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:46,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:46,150 INFO L93 Difference]: Finished difference Result 147 states and 168 transitions. [2021-11-07 08:04:46,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:04:46,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-11-07 08:04:46,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:46,152 INFO L225 Difference]: With dead ends: 147 [2021-11-07 08:04:46,152 INFO L226 Difference]: Without dead ends: 147 [2021-11-07 08:04:46,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:04:46,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-07 08:04:46,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-11-07 08:04:46,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 121 states have (on average 1.3636363636363635) internal successors, (165), 143 states have internal predecessors, (165), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 168 transitions. [2021-11-07 08:04:46,156 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 168 transitions. Word has length 27 [2021-11-07 08:04:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:46,156 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 168 transitions. [2021-11-07 08:04:46,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 168 transitions. [2021-11-07 08:04:46,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 08:04:46,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:46,158 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:46,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:04:46,158 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr56ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:46,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:46,159 INFO L85 PathProgramCache]: Analyzing trace with hash -697494680, now seen corresponding path program 1 times [2021-11-07 08:04:46,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:46,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702152472] [2021-11-07 08:04:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:46,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:46,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:46,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:46,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702152472] [2021-11-07 08:04:46,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702152472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:46,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:46,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:04:46,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732862094] [2021-11-07 08:04:46,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:04:46,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:46,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:04:46,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:04:46,281 INFO L87 Difference]: Start difference. First operand 147 states and 168 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:46,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:46,771 INFO L93 Difference]: Finished difference Result 224 states and 252 transitions. [2021-11-07 08:04:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:04:46,772 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-11-07 08:04:46,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:46,774 INFO L225 Difference]: With dead ends: 224 [2021-11-07 08:04:46,774 INFO L226 Difference]: Without dead ends: 224 [2021-11-07 08:04:46,774 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:04:46,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-07 08:04:46,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 190. [2021-11-07 08:04:46,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 164 states have (on average 1.3902439024390243) internal successors, (228), 186 states have internal predecessors, (228), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 231 transitions. [2021-11-07 08:04:46,788 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 231 transitions. Word has length 29 [2021-11-07 08:04:46,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:46,789 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 231 transitions. [2021-11-07 08:04:46,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:46,789 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 231 transitions. [2021-11-07 08:04:46,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 08:04:46,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:46,790 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:46,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 08:04:46,791 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:46,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:46,791 INFO L85 PathProgramCache]: Analyzing trace with hash 447420343, now seen corresponding path program 1 times [2021-11-07 08:04:46,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:46,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153865098] [2021-11-07 08:04:46,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:46,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:46,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:46,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:46,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153865098] [2021-11-07 08:04:46,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153865098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:46,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:46,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 08:04:46,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490036488] [2021-11-07 08:04:46,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:04:46,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:46,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:04:46,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:04:46,961 INFO L87 Difference]: Start difference. First operand 190 states and 231 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:47,654 INFO L93 Difference]: Finished difference Result 328 states and 378 transitions. [2021-11-07 08:04:47,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 08:04:47,655 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-11-07 08:04:47,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:47,657 INFO L225 Difference]: With dead ends: 328 [2021-11-07 08:04:47,657 INFO L226 Difference]: Without dead ends: 328 [2021-11-07 08:04:47,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:04:47,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-07 08:04:47,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 203. [2021-11-07 08:04:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 177 states have (on average 1.384180790960452) internal successors, (245), 199 states have internal predecessors, (245), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 248 transitions. [2021-11-07 08:04:47,684 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 248 transitions. Word has length 31 [2021-11-07 08:04:47,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:47,686 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 248 transitions. [2021-11-07 08:04:47,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 248 transitions. [2021-11-07 08:04:47,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 08:04:47,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:47,687 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:47,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 08:04:47,688 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr53REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:47,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:47,689 INFO L85 PathProgramCache]: Analyzing trace with hash 447420344, now seen corresponding path program 1 times [2021-11-07 08:04:47,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:47,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278063849] [2021-11-07 08:04:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:47,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:47,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:47,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:47,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:47,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278063849] [2021-11-07 08:04:47,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278063849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:47,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:47,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-07 08:04:47,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455890159] [2021-11-07 08:04:47,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:04:47,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:47,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:04:47,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:04:47,978 INFO L87 Difference]: Start difference. First operand 203 states and 248 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:48,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:48,908 INFO L93 Difference]: Finished difference Result 293 states and 347 transitions. [2021-11-07 08:04:48,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 08:04:48,908 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-11-07 08:04:48,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:48,910 INFO L225 Difference]: With dead ends: 293 [2021-11-07 08:04:48,910 INFO L226 Difference]: Without dead ends: 293 [2021-11-07 08:04:48,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:04:48,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-07 08:04:48,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 211. [2021-11-07 08:04:48,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 185 states have (on average 1.372972972972973) internal successors, (254), 207 states have internal predecessors, (254), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 257 transitions. [2021-11-07 08:04:48,927 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 257 transitions. Word has length 31 [2021-11-07 08:04:48,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:48,927 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 257 transitions. [2021-11-07 08:04:48,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 257 transitions. [2021-11-07 08:04:48,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 08:04:48,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:48,929 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:48,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 08:04:48,929 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:48,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:48,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1726087730, now seen corresponding path program 1 times [2021-11-07 08:04:48,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:48,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205142711] [2021-11-07 08:04:48,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:48,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:48,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:48,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:48,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205142711] [2021-11-07 08:04:48,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205142711] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:48,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:48,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:04:48,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775718453] [2021-11-07 08:04:48,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:04:48,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:48,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:04:48,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:04:48,976 INFO L87 Difference]: Start difference. First operand 211 states and 257 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:49,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:49,109 INFO L93 Difference]: Finished difference Result 233 states and 283 transitions. [2021-11-07 08:04:49,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:04:49,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-11-07 08:04:49,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:49,111 INFO L225 Difference]: With dead ends: 233 [2021-11-07 08:04:49,111 INFO L226 Difference]: Without dead ends: 233 [2021-11-07 08:04:49,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:04:49,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-07 08:04:49,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 219. [2021-11-07 08:04:49,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 193 states have (on average 1.3523316062176165) internal successors, (261), 215 states have internal predecessors, (261), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:49,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 264 transitions. [2021-11-07 08:04:49,119 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 264 transitions. Word has length 31 [2021-11-07 08:04:49,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:49,119 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 264 transitions. [2021-11-07 08:04:49,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:49,119 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 264 transitions. [2021-11-07 08:04:49,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 08:04:49,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:49,120 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:49,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 08:04:49,121 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:49,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:49,121 INFO L85 PathProgramCache]: Analyzing trace with hash -143116081, now seen corresponding path program 1 times [2021-11-07 08:04:49,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:49,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173010746] [2021-11-07 08:04:49,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:49,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:49,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:49,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:49,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173010746] [2021-11-07 08:04:49,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173010746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:49,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:49,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:04:49,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397603195] [2021-11-07 08:04:49,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:04:49,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:49,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:04:49,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:04:49,192 INFO L87 Difference]: Start difference. First operand 219 states and 264 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:49,419 INFO L93 Difference]: Finished difference Result 228 states and 274 transitions. [2021-11-07 08:04:49,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:04:49,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-11-07 08:04:49,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:49,422 INFO L225 Difference]: With dead ends: 228 [2021-11-07 08:04:49,422 INFO L226 Difference]: Without dead ends: 228 [2021-11-07 08:04:49,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:04:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-07 08:04:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 218. [2021-11-07 08:04:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 193 states have (on average 1.3471502590673574) internal successors, (260), 214 states have internal predecessors, (260), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 263 transitions. [2021-11-07 08:04:49,429 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 263 transitions. Word has length 32 [2021-11-07 08:04:49,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:49,429 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 263 transitions. [2021-11-07 08:04:49,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:49,430 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 263 transitions. [2021-11-07 08:04:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 08:04:49,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:49,430 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:49,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 08:04:49,431 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr37REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:49,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:49,431 INFO L85 PathProgramCache]: Analyzing trace with hash -143116080, now seen corresponding path program 1 times [2021-11-07 08:04:49,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:49,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335577498] [2021-11-07 08:04:49,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:49,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:49,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:49,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:49,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335577498] [2021-11-07 08:04:49,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335577498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:49,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:49,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:04:49,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478017023] [2021-11-07 08:04:49,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:04:49,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:49,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:04:49,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:04:49,508 INFO L87 Difference]: Start difference. First operand 218 states and 263 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:49,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:49,722 INFO L93 Difference]: Finished difference Result 217 states and 262 transitions. [2021-11-07 08:04:49,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:04:49,723 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-11-07 08:04:49,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:49,724 INFO L225 Difference]: With dead ends: 217 [2021-11-07 08:04:49,724 INFO L226 Difference]: Without dead ends: 217 [2021-11-07 08:04:49,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:04:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-07 08:04:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-11-07 08:04:49,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 193 states have (on average 1.3419689119170986) internal successors, (259), 213 states have internal predecessors, (259), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:49,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 262 transitions. [2021-11-07 08:04:49,731 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 262 transitions. Word has length 32 [2021-11-07 08:04:49,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:49,731 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 262 transitions. [2021-11-07 08:04:49,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:49,732 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 262 transitions. [2021-11-07 08:04:49,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 08:04:49,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:49,733 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:49,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 08:04:49,733 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr56ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:49,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:49,733 INFO L85 PathProgramCache]: Analyzing trace with hash -734563416, now seen corresponding path program 1 times [2021-11-07 08:04:49,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:49,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400310297] [2021-11-07 08:04:49,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:49,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:49,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:49,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:49,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400310297] [2021-11-07 08:04:49,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400310297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:49,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:49,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-07 08:04:49,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169600411] [2021-11-07 08:04:49,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:04:49,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:49,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:04:49,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:04:49,887 INFO L87 Difference]: Start difference. First operand 217 states and 262 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:50,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:50,480 INFO L93 Difference]: Finished difference Result 289 states and 335 transitions. [2021-11-07 08:04:50,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 08:04:50,484 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-11-07 08:04:50,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:50,485 INFO L225 Difference]: With dead ends: 289 [2021-11-07 08:04:50,486 INFO L226 Difference]: Without dead ends: 289 [2021-11-07 08:04:50,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:04:50,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-07 08:04:50,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 215. [2021-11-07 08:04:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 191 states have (on average 1.3403141361256545) internal successors, (256), 211 states have internal predecessors, (256), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 259 transitions. [2021-11-07 08:04:50,493 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 259 transitions. Word has length 33 [2021-11-07 08:04:50,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:50,494 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 259 transitions. [2021-11-07 08:04:50,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:50,494 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 259 transitions. [2021-11-07 08:04:50,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 08:04:50,495 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:50,495 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:50,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 08:04:50,496 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:50,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:50,496 INFO L85 PathProgramCache]: Analyzing trace with hash -252325197, now seen corresponding path program 1 times [2021-11-07 08:04:50,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:50,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601198488] [2021-11-07 08:04:50,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:50,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:50,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:50,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:50,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601198488] [2021-11-07 08:04:50,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601198488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:50,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28157877] [2021-11-07 08:04:50,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:50,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:50,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:50,616 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:50,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:04:50,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:50,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 08:04:50,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:50,871 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 11 treesize of output 7 [2021-11-07 08:04:50,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 08:04:50,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:04:50,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 08:04:50,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:04:50,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 08:04:51,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:04:51,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:04:51,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:04:51,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:04:51,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-07 08:04:51,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:04:51,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:04:51,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:04:51,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-07 08:04:51,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:04:51,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:04:51,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:04:51,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:04:51,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-07 08:04:51,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:04:51,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:04:51,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:04:51,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-07 08:04:51,744 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-07 08:04:51,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 50 [2021-11-07 08:04:51,758 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-07 08:04:51,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 25 [2021-11-07 08:04:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:51,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28157877] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:51,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:51,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-11-07 08:04:51,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008268502] [2021-11-07 08:04:51,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:04:51,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:51,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:04:51,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:04:51,777 INFO L87 Difference]: Start difference. First operand 215 states and 259 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:52,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:52,521 INFO L93 Difference]: Finished difference Result 221 states and 247 transitions. [2021-11-07 08:04:52,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 08:04:52,525 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-11-07 08:04:52,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:52,527 INFO L225 Difference]: With dead ends: 221 [2021-11-07 08:04:52,527 INFO L226 Difference]: Without dead ends: 221 [2021-11-07 08:04:52,527 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:04:52,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-07 08:04:52,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 193. [2021-11-07 08:04:52,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 169 states have (on average 1.3076923076923077) internal successors, (221), 189 states have internal predecessors, (221), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:52,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 224 transitions. [2021-11-07 08:04:52,534 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 224 transitions. Word has length 33 [2021-11-07 08:04:52,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:52,535 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 224 transitions. [2021-11-07 08:04:52,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:52,535 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 224 transitions. [2021-11-07 08:04:52,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 08:04:52,536 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:52,536 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:52,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:52,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-07 08:04:52,737 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr56ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:52,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:52,737 INFO L85 PathProgramCache]: Analyzing trace with hash 158286245, now seen corresponding path program 1 times [2021-11-07 08:04:52,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:52,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078168046] [2021-11-07 08:04:52,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:52,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:52,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:52,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:52,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078168046] [2021-11-07 08:04:52,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078168046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:52,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:52,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 08:04:52,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967775441] [2021-11-07 08:04:52,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:04:52,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:52,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:04:52,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:04:52,888 INFO L87 Difference]: Start difference. First operand 193 states and 224 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:53,258 INFO L93 Difference]: Finished difference Result 241 states and 275 transitions. [2021-11-07 08:04:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:04:53,259 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-11-07 08:04:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:53,260 INFO L225 Difference]: With dead ends: 241 [2021-11-07 08:04:53,261 INFO L226 Difference]: Without dead ends: 241 [2021-11-07 08:04:53,261 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:04:53,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-07 08:04:53,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 199. [2021-11-07 08:04:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 175 states have (on average 1.302857142857143) internal successors, (228), 195 states have internal predecessors, (228), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 231 transitions. [2021-11-07 08:04:53,268 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 231 transitions. Word has length 35 [2021-11-07 08:04:53,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:53,268 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 231 transitions. [2021-11-07 08:04:53,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:53,268 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 231 transitions. [2021-11-07 08:04:53,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 08:04:53,269 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:53,269 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:53,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 08:04:53,270 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr62REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:53,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:53,270 INFO L85 PathProgramCache]: Analyzing trace with hash 131941045, now seen corresponding path program 1 times [2021-11-07 08:04:53,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:53,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135856345] [2021-11-07 08:04:53,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:53,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:04:53,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:53,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135856345] [2021-11-07 08:04:53,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135856345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:53,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:53,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:04:53,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545885163] [2021-11-07 08:04:53,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:04:53,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:53,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:04:53,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:04:53,349 INFO L87 Difference]: Start difference. First operand 199 states and 231 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:53,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:53,574 INFO L93 Difference]: Finished difference Result 231 states and 259 transitions. [2021-11-07 08:04:53,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:04:53,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-11-07 08:04:53,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:53,577 INFO L225 Difference]: With dead ends: 231 [2021-11-07 08:04:53,577 INFO L226 Difference]: Without dead ends: 231 [2021-11-07 08:04:53,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:04:53,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-07 08:04:53,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 194. [2021-11-07 08:04:53,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 170 states have (on average 1.2941176470588236) internal successors, (220), 190 states have internal predecessors, (220), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:53,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 223 transitions. [2021-11-07 08:04:53,584 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 223 transitions. Word has length 37 [2021-11-07 08:04:53,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:53,585 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 223 transitions. [2021-11-07 08:04:53,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:53,585 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 223 transitions. [2021-11-07 08:04:53,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 08:04:53,586 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:53,586 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:53,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-07 08:04:53,587 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr56ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:53,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:53,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1989340234, now seen corresponding path program 1 times [2021-11-07 08:04:53,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:53,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41954308] [2021-11-07 08:04:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:53,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:53,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:53,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41954308] [2021-11-07 08:04:53,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41954308] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:53,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:53,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-07 08:04:53,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027394382] [2021-11-07 08:04:53,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:04:53,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:53,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:04:53,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:04:53,927 INFO L87 Difference]: Start difference. First operand 194 states and 223 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:55,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:55,029 INFO L93 Difference]: Finished difference Result 231 states and 259 transitions. [2021-11-07 08:04:55,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 08:04:55,030 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-11-07 08:04:55,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:55,031 INFO L225 Difference]: With dead ends: 231 [2021-11-07 08:04:55,031 INFO L226 Difference]: Without dead ends: 231 [2021-11-07 08:04:55,032 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:04:55,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-07 08:04:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 191. [2021-11-07 08:04:55,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 167 states have (on average 1.2874251497005988) internal successors, (215), 187 states have internal predecessors, (215), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:55,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 218 transitions. [2021-11-07 08:04:55,038 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 218 transitions. Word has length 38 [2021-11-07 08:04:55,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:55,039 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 218 transitions. [2021-11-07 08:04:55,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:55,039 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 218 transitions. [2021-11-07 08:04:55,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 08:04:55,040 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:55,040 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:55,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-07 08:04:55,040 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr69ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:55,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:55,041 INFO L85 PathProgramCache]: Analyzing trace with hash 760764660, now seen corresponding path program 1 times [2021-11-07 08:04:55,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:55,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205183001] [2021-11-07 08:04:55,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:55,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:55,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:04:55,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:55,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205183001] [2021-11-07 08:04:55,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205183001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:55,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:55,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:04:55,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523742555] [2021-11-07 08:04:55,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:04:55,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:55,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:04:55,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:04:55,104 INFO L87 Difference]: Start difference. First operand 191 states and 218 transitions. Second operand has 5 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:55,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:55,318 INFO L93 Difference]: Finished difference Result 208 states and 229 transitions. [2021-11-07 08:04:55,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:04:55,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-11-07 08:04:55,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:55,321 INFO L225 Difference]: With dead ends: 208 [2021-11-07 08:04:55,321 INFO L226 Difference]: Without dead ends: 208 [2021-11-07 08:04:55,321 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:04:55,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-07 08:04:55,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 193. [2021-11-07 08:04:55,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 169 states have (on average 1.2840236686390532) internal successors, (217), 189 states have internal predecessors, (217), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 220 transitions. [2021-11-07 08:04:55,328 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 220 transitions. Word has length 40 [2021-11-07 08:04:55,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:55,328 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 220 transitions. [2021-11-07 08:04:55,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:55,329 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 220 transitions. [2021-11-07 08:04:55,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 08:04:55,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:55,330 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:55,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-07 08:04:55,330 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr65ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:55,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:55,331 INFO L85 PathProgramCache]: Analyzing trace with hash 760753675, now seen corresponding path program 1 times [2021-11-07 08:04:55,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:55,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121253497] [2021-11-07 08:04:55,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:55,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:55,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:04:55,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:55,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121253497] [2021-11-07 08:04:55,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121253497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:55,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:55,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 08:04:55,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442004968] [2021-11-07 08:04:55,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:04:55,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:55,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:04:55,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:04:55,434 INFO L87 Difference]: Start difference. First operand 193 states and 220 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:55,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:55,711 INFO L93 Difference]: Finished difference Result 239 states and 269 transitions. [2021-11-07 08:04:55,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:04:55,712 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-11-07 08:04:55,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:55,714 INFO L225 Difference]: With dead ends: 239 [2021-11-07 08:04:55,714 INFO L226 Difference]: Without dead ends: 239 [2021-11-07 08:04:55,714 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:04:55,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-07 08:04:55,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 210. [2021-11-07 08:04:55,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 186 states have (on average 1.2634408602150538) internal successors, (235), 206 states have internal predecessors, (235), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:55,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 238 transitions. [2021-11-07 08:04:55,721 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 238 transitions. Word has length 40 [2021-11-07 08:04:55,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:55,721 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 238 transitions. [2021-11-07 08:04:55,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:55,721 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 238 transitions. [2021-11-07 08:04:55,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 08:04:55,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:55,722 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:55,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-07 08:04:55,723 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr66ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:55,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:55,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2108527701, now seen corresponding path program 1 times [2021-11-07 08:04:55,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:55,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416297646] [2021-11-07 08:04:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:55,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:55,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:55,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:55,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416297646] [2021-11-07 08:04:55,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416297646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:55,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723787246] [2021-11-07 08:04:55,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:55,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:55,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:55,927 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:55,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:04:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:56,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 08:04:56,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:56,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:04:56,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:04:56,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-07 08:04:56,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438198953] [2021-11-07 08:04:56,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:04:56,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:56,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:04:56,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:04:56,771 INFO L87 Difference]: Start difference. First operand 210 states and 238 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:57,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:57,260 INFO L93 Difference]: Finished difference Result 286 states and 312 transitions. [2021-11-07 08:04:57,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:04:57,261 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-11-07 08:04:57,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:57,263 INFO L225 Difference]: With dead ends: 286 [2021-11-07 08:04:57,263 INFO L226 Difference]: Without dead ends: 286 [2021-11-07 08:04:57,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:04:57,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-07 08:04:57,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 241. [2021-11-07 08:04:57,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 217 states have (on average 1.2903225806451613) internal successors, (280), 237 states have internal predecessors, (280), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:57,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 283 transitions. [2021-11-07 08:04:57,272 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 283 transitions. Word has length 41 [2021-11-07 08:04:57,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:57,273 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 283 transitions. [2021-11-07 08:04:57,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:57,273 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 283 transitions. [2021-11-07 08:04:57,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 08:04:57,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:57,274 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:57,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:57,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:57,503 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:04:57,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:57,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1674248020, now seen corresponding path program 1 times [2021-11-07 08:04:57,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:57,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45182599] [2021-11-07 08:04:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:57,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:58,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:04:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:58,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:58,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45182599] [2021-11-07 08:04:58,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45182599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:58,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394476069] [2021-11-07 08:04:58,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:58,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:58,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:58,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:58,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:04:58,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:58,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 08:04:58,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:58,367 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:04:58,415 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 13 treesize of output 9 [2021-11-07 08:04:58,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:04:58,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-07 08:04:58,579 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:04:58,579 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 11 treesize of output 11 [2021-11-07 08:04:58,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:04:58,640 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 25 treesize of output 13 [2021-11-07 08:04:58,647 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 [2021-11-07 08:04:58,806 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 08:04:58,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 52 [2021-11-07 08:04:58,822 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-07 08:04:58,822 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 62 treesize of output 34 [2021-11-07 08:04:58,947 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 08:04:58,947 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 17 [2021-11-07 08:04:59,039 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 25 treesize of output 13 [2021-11-07 08:04:59,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 08:04:59,186 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-11-07 08:04:59,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 29 [2021-11-07 08:04:59,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.base, main_~x~0.offset] [2021-11-07 08:04:59,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:04:59,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-07 08:04:59,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107703064] [2021-11-07 08:04:59,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:04:59,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:59,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:04:59,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:04:59,319 INFO L87 Difference]: Start difference. First operand 241 states and 283 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:00,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:00,446 INFO L93 Difference]: Finished difference Result 430 states and 502 transitions. [2021-11-07 08:05:00,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 08:05:00,447 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-11-07 08:05:00,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:00,449 INFO L225 Difference]: With dead ends: 430 [2021-11-07 08:05:00,449 INFO L226 Difference]: Without dead ends: 430 [2021-11-07 08:05:00,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 08:05:00,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-11-07 08:05:00,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 269. [2021-11-07 08:05:00,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 245 states have (on average 1.2816326530612245) internal successors, (314), 265 states have internal predecessors, (314), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:00,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 317 transitions. [2021-11-07 08:05:00,460 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 317 transitions. Word has length 42 [2021-11-07 08:05:00,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:00,461 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 317 transitions. [2021-11-07 08:05:00,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:00,461 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 317 transitions. [2021-11-07 08:05:00,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 08:05:00,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:00,462 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:00,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:05:00,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 08:05:00,691 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr53REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:05:00,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:00,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1674248019, now seen corresponding path program 1 times [2021-11-07 08:05:00,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:00,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027370007] [2021-11-07 08:05:00,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:00,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:01,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:05:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:01,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:01,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027370007] [2021-11-07 08:05:01,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027370007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:01,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285794883] [2021-11-07 08:05:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:01,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:01,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:01,381 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:01,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:05:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:01,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 08:05:01,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:01,730 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:05:01,800 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 13 treesize of output 9 [2021-11-07 08:05:01,806 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 13 treesize of output 9 [2021-11-07 08:05:01,901 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:05:01,901 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 11 treesize of output 11 [2021-11-07 08:05:01,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:01,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 08:05:02,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:02,004 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 25 treesize of output 24 [2021-11-07 08:05:02,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:02,244 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-07 08:05:02,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 65 [2021-11-07 08:05:02,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:02,277 INFO L354 Elim1Store]: treesize reduction 78, result has 17.9 percent of original size [2021-11-07 08:05:02,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 66 [2021-11-07 08:05:02,790 INFO L354 Elim1Store]: treesize reduction 118, result has 21.3 percent of original size [2021-11-07 08:05:02,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 96 [2021-11-07 08:05:02,833 INFO L354 Elim1Store]: treesize reduction 110, result has 22.5 percent of original size [2021-11-07 08:05:02,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 95 [2021-11-07 08:05:03,186 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-07 08:05:03,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 80 [2021-11-07 08:05:03,203 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-07 08:05:03,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 61 [2021-11-07 08:05:03,371 INFO L354 Elim1Store]: treesize reduction 118, result has 16.9 percent of original size [2021-11-07 08:05:03,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 107 treesize of output 87 [2021-11-07 08:05:03,403 INFO L354 Elim1Store]: treesize reduction 146, result has 16.1 percent of original size [2021-11-07 08:05:03,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 100 [2021-11-07 08:05:05,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:05:05,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:05:05,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-07 08:05:05,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770511584] [2021-11-07 08:05:05,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:05:05,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:05,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:05:05,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=536, Unknown=2, NotChecked=0, Total=650 [2021-11-07 08:05:05,970 INFO L87 Difference]: Start difference. First operand 269 states and 317 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:07,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:07,298 INFO L93 Difference]: Finished difference Result 407 states and 470 transitions. [2021-11-07 08:05:07,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 08:05:07,311 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-11-07 08:05:07,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:07,314 INFO L225 Difference]: With dead ends: 407 [2021-11-07 08:05:07,314 INFO L226 Difference]: Without dead ends: 407 [2021-11-07 08:05:07,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=276, Invalid=1204, Unknown=2, NotChecked=0, Total=1482 [2021-11-07 08:05:07,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-11-07 08:05:07,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 267. [2021-11-07 08:05:07,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 243 states have (on average 1.2757201646090535) internal successors, (310), 263 states have internal predecessors, (310), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:07,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 313 transitions. [2021-11-07 08:05:07,324 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 313 transitions. Word has length 42 [2021-11-07 08:05:07,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:07,325 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 313 transitions. [2021-11-07 08:05:07,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:07,325 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 313 transitions. [2021-11-07 08:05:07,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 08:05:07,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:07,326 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:07,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:05:07,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:07,555 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr59REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:05:07,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:07,555 INFO L85 PathProgramCache]: Analyzing trace with hash -602170694, now seen corresponding path program 1 times [2021-11-07 08:05:07,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:07,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444736964] [2021-11-07 08:05:07,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:07,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:07,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:05:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:07,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:07,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444736964] [2021-11-07 08:05:07,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444736964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:07,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935796764] [2021-11-07 08:05:07,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:07,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:07,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:07,714 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:07,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:05:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:08,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 08:05:08,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:08,586 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 08:05:08,586 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 41 treesize of output 36 [2021-11-07 08:05:08,596 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 08:05:08,596 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 30 treesize of output 25 [2021-11-07 08:05:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:08,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935796764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:08,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:05:08,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-11-07 08:05:08,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695861300] [2021-11-07 08:05:08,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 08:05:08,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:08,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 08:05:08,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:05:08,658 INFO L87 Difference]: Start difference. First operand 267 states and 313 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 15 states have internal predecessors, (71), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:09,527 INFO L93 Difference]: Finished difference Result 379 states and 438 transitions. [2021-11-07 08:05:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:05:09,528 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 15 states have internal predecessors, (71), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-11-07 08:05:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:09,530 INFO L225 Difference]: With dead ends: 379 [2021-11-07 08:05:09,530 INFO L226 Difference]: Without dead ends: 379 [2021-11-07 08:05:09,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:05:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-07 08:05:09,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 294. [2021-11-07 08:05:09,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 270 states have (on average 1.2740740740740741) internal successors, (344), 290 states have internal predecessors, (344), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 347 transitions. [2021-11-07 08:05:09,540 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 347 transitions. Word has length 43 [2021-11-07 08:05:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:09,541 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 347 transitions. [2021-11-07 08:05:09,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 15 states have internal predecessors, (71), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 347 transitions. [2021-11-07 08:05:09,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 08:05:09,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:09,542 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:09,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:05:09,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:09,769 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr56ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:05:09,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:09,769 INFO L85 PathProgramCache]: Analyzing trace with hash 451605341, now seen corresponding path program 1 times [2021-11-07 08:05:09,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:09,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650570056] [2021-11-07 08:05:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:09,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:10,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:05:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:10,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:10,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650570056] [2021-11-07 08:05:10,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650570056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:10,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053619125] [2021-11-07 08:05:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:10,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:10,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:10,315 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:10,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:05:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:10,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 08:05:10,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:10,664 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:05:10,713 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 13 treesize of output 9 [2021-11-07 08:05:10,720 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 13 treesize of output 9 [2021-11-07 08:05:10,795 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:05:10,796 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 11 treesize of output 11 [2021-11-07 08:05:10,858 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 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-07 08:05:10,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:10,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:10,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 24 [2021-11-07 08:05:10,879 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 0 case distinctions, treesize of input 24 treesize of output 19 [2021-11-07 08:05:10,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:10,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:10,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 20 [2021-11-07 08:05:11,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:11,046 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-07 08:05:11,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 58 [2021-11-07 08:05:11,064 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-07 08:05:11,064 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 61 treesize of output 56 [2021-11-07 08:05:11,439 INFO L354 Elim1Store]: treesize reduction 118, result has 21.3 percent of original size [2021-11-07 08:05:11,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 89 [2021-11-07 08:05:11,466 INFO L354 Elim1Store]: treesize reduction 62, result has 28.7 percent of original size [2021-11-07 08:05:11,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 82 [2021-11-07 08:05:11,739 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-07 08:05:11,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-07 08:05:11,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:11,753 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-07 08:05:11,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 38 [2021-11-07 08:05:11,825 INFO L354 Elim1Store]: treesize reduction 118, result has 16.9 percent of original size [2021-11-07 08:05:11,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 80 [2021-11-07 08:05:11,849 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-11-07 08:05:11,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 90 [2021-11-07 08:05:12,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:05:12,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:05:12,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-07 08:05:12,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638453802] [2021-11-07 08:05:12,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:05:12,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:12,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:05:12,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:05:12,101 INFO L87 Difference]: Start difference. First operand 294 states and 347 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:13,293 INFO L93 Difference]: Finished difference Result 454 states and 531 transitions. [2021-11-07 08:05:13,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 08:05:13,295 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-11-07 08:05:13,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:13,297 INFO L225 Difference]: With dead ends: 454 [2021-11-07 08:05:13,298 INFO L226 Difference]: Without dead ends: 454 [2021-11-07 08:05:13,300 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 08:05:13,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-11-07 08:05:13,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 301. [2021-11-07 08:05:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 277 states have (on average 1.2671480144404332) internal successors, (351), 297 states have internal predecessors, (351), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 354 transitions. [2021-11-07 08:05:13,312 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 354 transitions. Word has length 44 [2021-11-07 08:05:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:13,313 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 354 transitions. [2021-11-07 08:05:13,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 354 transitions. [2021-11-07 08:05:13,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 08:05:13,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:13,314 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:13,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:05:13,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:13,527 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr71ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:05:13,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:13,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1487423079, now seen corresponding path program 1 times [2021-11-07 08:05:13,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:13,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376786824] [2021-11-07 08:05:13,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:13,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:13,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:05:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:05:13,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:13,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376786824] [2021-11-07 08:05:13,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376786824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:13,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850688213] [2021-11-07 08:05:13,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:13,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:13,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:13,632 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:13,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:05:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:14,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:05:14,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:05:14,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850688213] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:14,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:05:14,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-07 08:05:14,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787568565] [2021-11-07 08:05:14,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:05:14,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:14,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:05:14,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:05:14,421 INFO L87 Difference]: Start difference. First operand 301 states and 354 transitions. Second operand has 9 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:14,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:14,762 INFO L93 Difference]: Finished difference Result 313 states and 365 transitions. [2021-11-07 08:05:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:05:14,762 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-11-07 08:05:14,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:14,764 INFO L225 Difference]: With dead ends: 313 [2021-11-07 08:05:14,764 INFO L226 Difference]: Without dead ends: 283 [2021-11-07 08:05:14,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:05:14,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-07 08:05:14,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2021-11-07 08:05:14,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 259 states have (on average 1.277992277992278) internal successors, (331), 279 states have internal predecessors, (331), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:14,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 334 transitions. [2021-11-07 08:05:14,774 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 334 transitions. Word has length 44 [2021-11-07 08:05:14,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:14,774 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 334 transitions. [2021-11-07 08:05:14,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:14,775 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 334 transitions. [2021-11-07 08:05:14,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 08:05:14,780 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:14,780 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:14,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:05:15,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-07 08:05:15,003 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:05:15,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:15,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2042169452, now seen corresponding path program 1 times [2021-11-07 08:05:15,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:15,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125534275] [2021-11-07 08:05:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:15,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:15,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:05:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:15,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:15,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125534275] [2021-11-07 08:05:15,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125534275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:15,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139788430] [2021-11-07 08:05:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:15,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:15,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:15,470 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:15,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:05:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:15,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 08:05:15,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:15,900 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:05:15,949 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 08:05:15,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-07 08:05:15,998 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 23 treesize of output 19 [2021-11-07 08:05:16,111 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 08:05:16,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-11-07 08:05:16,318 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-07 08:05:16,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-11-07 08:05:16,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:16,462 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-07 08:05:16,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 52 [2021-11-07 08:05:16,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:16,799 INFO L354 Elim1Store]: treesize reduction 116, result has 17.1 percent of original size [2021-11-07 08:05:16,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 64 [2021-11-07 08:05:17,296 INFO L354 Elim1Store]: treesize reduction 182, result has 17.6 percent of original size [2021-11-07 08:05:17,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 86 [2021-11-07 08:05:17,598 INFO L354 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2021-11-07 08:05:17,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 59 [2021-11-07 08:05:17,699 INFO L354 Elim1Store]: treesize reduction 184, result has 14.4 percent of original size [2021-11-07 08:05:17,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 105 treesize of output 77 [2021-11-07 08:05:21,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:05:21,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:05:21,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-07 08:05:21,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479200410] [2021-11-07 08:05:21,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:05:21,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:21,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:05:21,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=745, Unknown=3, NotChecked=0, Total=930 [2021-11-07 08:05:21,602 INFO L87 Difference]: Start difference. First operand 283 states and 334 transitions. Second operand has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:23,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:23,503 INFO L93 Difference]: Finished difference Result 598 states and 710 transitions. [2021-11-07 08:05:23,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 08:05:23,504 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-11-07 08:05:23,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:23,507 INFO L225 Difference]: With dead ends: 598 [2021-11-07 08:05:23,507 INFO L226 Difference]: Without dead ends: 598 [2021-11-07 08:05:23,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=624, Invalid=2795, Unknown=3, NotChecked=0, Total=3422 [2021-11-07 08:05:23,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-07 08:05:23,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 311. [2021-11-07 08:05:23,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 287 states have (on average 1.2717770034843205) internal successors, (365), 307 states have internal predecessors, (365), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:23,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 368 transitions. [2021-11-07 08:05:23,519 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 368 transitions. Word has length 46 [2021-11-07 08:05:23,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:23,519 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 368 transitions. [2021-11-07 08:05:23,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:23,520 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 368 transitions. [2021-11-07 08:05:23,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 08:05:23,521 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:23,521 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:23,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:05:23,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:23,747 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr53REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:05:23,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:23,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2042169453, now seen corresponding path program 1 times [2021-11-07 08:05:23,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:23,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314813511] [2021-11-07 08:05:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:23,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:24,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:05:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:24,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:24,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314813511] [2021-11-07 08:05:24,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314813511] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:24,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377310029] [2021-11-07 08:05:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:24,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:24,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:24,395 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:24,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:05:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:25,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-07 08:05:25,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:25,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:05:25,121 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 08:05:25,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-07 08:05:25,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:05:25,178 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 13 treesize of output 9 [2021-11-07 08:05:25,186 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 28 treesize of output 24 [2021-11-07 08:05:25,313 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 08:05:25,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 54 [2021-11-07 08:05:25,325 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-07 08:05:25,326 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 78 treesize of output 71 [2021-11-07 08:05:25,625 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-07 08:05:25,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 18 treesize of output 20 [2021-11-07 08:05:25,661 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-07 08:05:25,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-11-07 08:05:25,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:25,803 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-07 08:05:25,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 79 [2021-11-07 08:05:25,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:25,820 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-07 08:05:25,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 101 [2021-11-07 08:05:26,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:26,202 INFO L354 Elim1Store]: treesize reduction 116, result has 17.1 percent of original size [2021-11-07 08:05:26,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 137 treesize of output 100 [2021-11-07 08:05:26,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:26,241 INFO L354 Elim1Store]: treesize reduction 170, result has 15.0 percent of original size [2021-11-07 08:05:26,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 129 treesize of output 130 [2021-11-07 08:05:26,851 INFO L354 Elim1Store]: treesize reduction 182, result has 17.6 percent of original size [2021-11-07 08:05:26,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 153 treesize of output 129 [2021-11-07 08:05:26,915 INFO L354 Elim1Store]: treesize reduction 242, result has 16.8 percent of original size [2021-11-07 08:05:26,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 155 treesize of output 169 [2021-11-07 08:05:28,248 INFO L354 Elim1Store]: treesize reduction 208, result has 13.0 percent of original size [2021-11-07 08:05:28,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 157 treesize of output 117 [2021-11-07 08:05:28,288 INFO L354 Elim1Store]: treesize reduction 244, result has 13.2 percent of original size [2021-11-07 08:05:28,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 138 treesize of output 131 [2021-11-07 08:05:28,407 INFO L354 Elim1Store]: treesize reduction 184, result has 14.4 percent of original size [2021-11-07 08:05:28,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 166 treesize of output 120 [2021-11-07 08:05:28,459 INFO L354 Elim1Store]: treesize reduction 260, result has 13.6 percent of original size [2021-11-07 08:05:28,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 158 treesize of output 162 [2021-11-07 08:05:32,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:05:32,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:05:32,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-07 08:05:32,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147899435] [2021-11-07 08:05:32,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:05:32,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:32,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:05:32,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=847, Unknown=3, NotChecked=0, Total=992 [2021-11-07 08:05:32,377 INFO L87 Difference]: Start difference. First operand 311 states and 368 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:33,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:33,924 INFO L93 Difference]: Finished difference Result 470 states and 555 transitions. [2021-11-07 08:05:33,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 08:05:33,925 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-11-07 08:05:33,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:33,927 INFO L225 Difference]: With dead ends: 470 [2021-11-07 08:05:33,927 INFO L226 Difference]: Without dead ends: 470 [2021-11-07 08:05:33,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=264, Invalid=1539, Unknown=3, NotChecked=0, Total=1806 [2021-11-07 08:05:33,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-11-07 08:05:33,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 311. [2021-11-07 08:05:33,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 287 states have (on average 1.2682926829268293) internal successors, (364), 307 states have internal predecessors, (364), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:33,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 367 transitions. [2021-11-07 08:05:33,935 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 367 transitions. Word has length 46 [2021-11-07 08:05:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:33,936 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 367 transitions. [2021-11-07 08:05:33,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 367 transitions. [2021-11-07 08:05:33,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 08:05:33,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:33,937 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:33,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-07 08:05:34,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:34,163 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr65ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:05:34,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:34,163 INFO L85 PathProgramCache]: Analyzing trace with hash 639739822, now seen corresponding path program 1 times [2021-11-07 08:05:34,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:34,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777084617] [2021-11-07 08:05:34,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:34,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:34,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:05:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:34,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:34,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777084617] [2021-11-07 08:05:34,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777084617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:05:34,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:05:34,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 08:05:34,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741919694] [2021-11-07 08:05:34,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:05:34,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:34,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:05:34,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:05:34,372 INFO L87 Difference]: Start difference. First operand 311 states and 367 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:34,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:34,826 INFO L93 Difference]: Finished difference Result 336 states and 391 transitions. [2021-11-07 08:05:34,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:05:34,826 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-11-07 08:05:34,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:34,827 INFO L225 Difference]: With dead ends: 336 [2021-11-07 08:05:34,827 INFO L226 Difference]: Without dead ends: 331 [2021-11-07 08:05:34,828 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:05:34,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-07 08:05:34,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 307. [2021-11-07 08:05:34,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 283 states have (on average 1.2685512367491165) internal successors, (359), 303 states have internal predecessors, (359), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:34,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 362 transitions. [2021-11-07 08:05:34,835 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 362 transitions. Word has length 46 [2021-11-07 08:05:34,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:34,836 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 362 transitions. [2021-11-07 08:05:34,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:34,836 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 362 transitions. [2021-11-07 08:05:34,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 08:05:34,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:34,837 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:34,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-07 08:05:34,838 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:05:34,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:34,838 INFO L85 PathProgramCache]: Analyzing trace with hash -797850508, now seen corresponding path program 1 times [2021-11-07 08:05:34,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:34,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705167588] [2021-11-07 08:05:34,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:34,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:35,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:05:35,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:35,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:35,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705167588] [2021-11-07 08:05:35,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705167588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:35,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782675447] [2021-11-07 08:05:35,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:35,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:35,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:35,439 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:35,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:05:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:36,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-07 08:05:36,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:36,292 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:05:36,346 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 13 treesize of output 9 [2021-11-07 08:05:36,354 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 13 treesize of output 9 [2021-11-07 08:05:36,468 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:05:36,468 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 11 treesize of output 11 [2021-11-07 08:05:36,546 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-07 08:05:36,546 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 25 treesize of output 30 [2021-11-07 08:05:36,571 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-07 08:05:36,571 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 1 case distinctions, treesize of input 21 treesize of output 26 [2021-11-07 08:05:36,832 INFO L354 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2021-11-07 08:05:36,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 70 [2021-11-07 08:05:36,846 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-07 08:05:36,847 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 73 treesize of output 68 [2021-11-07 08:05:37,428 INFO L354 Elim1Store]: treesize reduction 118, result has 21.3 percent of original size [2021-11-07 08:05:37,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 96 [2021-11-07 08:05:37,461 INFO L354 Elim1Store]: treesize reduction 62, result has 28.7 percent of original size [2021-11-07 08:05:37,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 89 [2021-11-07 08:05:37,956 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-07 08:05:37,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 80 [2021-11-07 08:05:37,971 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-07 08:05:37,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 58 [2021-11-07 08:05:38,116 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:05:38,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-07 08:05:38,232 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-11-07 08:05:38,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 87 [2021-11-07 08:05:38,250 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-07 08:05:38,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 77 [2021-11-07 08:05:38,711 INFO L354 Elim1Store]: treesize reduction 174, result has 19.8 percent of original size [2021-11-07 08:05:38,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 146 treesize of output 114 [2021-11-07 08:05:38,739 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-11-07 08:05:38,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 121 [2021-11-07 08:05:43,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:05:43,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:05:43,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-07 08:05:43,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388691163] [2021-11-07 08:05:43,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:05:43,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:43,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:05:43,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=924, Unknown=2, NotChecked=0, Total=1056 [2021-11-07 08:05:43,513 INFO L87 Difference]: Start difference. First operand 307 states and 362 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:44,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:44,776 INFO L93 Difference]: Finished difference Result 503 states and 596 transitions. [2021-11-07 08:05:44,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:05:44,776 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-11-07 08:05:44,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:44,778 INFO L225 Difference]: With dead ends: 503 [2021-11-07 08:05:44,778 INFO L226 Difference]: Without dead ends: 503 [2021-11-07 08:05:44,779 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=286, Invalid=1964, Unknown=6, NotChecked=0, Total=2256 [2021-11-07 08:05:44,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-11-07 08:05:44,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 327. [2021-11-07 08:05:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 303 states have (on average 1.2640264026402641) internal successors, (383), 323 states have internal predecessors, (383), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:44,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 386 transitions. [2021-11-07 08:05:44,788 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 386 transitions. Word has length 46 [2021-11-07 08:05:44,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:44,788 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 386 transitions. [2021-11-07 08:05:44,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:44,789 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 386 transitions. [2021-11-07 08:05:44,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 08:05:44,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:44,790 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:44,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:05:45,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:45,003 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr53REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:05:45,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:45,003 INFO L85 PathProgramCache]: Analyzing trace with hash -797850507, now seen corresponding path program 1 times [2021-11-07 08:05:45,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:45,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485079511] [2021-11-07 08:05:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:45,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:45,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:05:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:45,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:45,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485079511] [2021-11-07 08:05:45,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485079511] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:45,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335732443] [2021-11-07 08:05:45,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:45,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:45,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:45,620 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:45,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:05:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:46,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 08:05:46,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:46,248 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:05:46,292 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 13 treesize of output 9 [2021-11-07 08:05:46,296 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 13 treesize of output 9 [2021-11-07 08:05:46,404 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:05:46,405 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 11 treesize of output 11 [2021-11-07 08:05:46,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:46,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 08:05:46,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:46,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-07 08:05:46,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:46,704 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-07 08:05:46,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 58 [2021-11-07 08:05:46,719 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-07 08:05:46,719 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 61 treesize of output 56 [2021-11-07 08:05:47,145 INFO L354 Elim1Store]: treesize reduction 118, result has 21.3 percent of original size [2021-11-07 08:05:47,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 87 [2021-11-07 08:05:47,164 INFO L354 Elim1Store]: treesize reduction 62, result has 28.7 percent of original size [2021-11-07 08:05:47,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 80 [2021-11-07 08:05:47,323 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-07 08:05:47,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 36 [2021-11-07 08:05:47,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:47,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-07 08:05:47,368 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:05:47,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-07 08:05:47,458 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-11-07 08:05:47,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 49 [2021-11-07 08:05:47,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:05:47,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-07 08:05:57,119 INFO L354 Elim1Store]: treesize reduction 174, result has 19.8 percent of original size [2021-11-07 08:05:57,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 128 treesize of output 100 [2021-11-07 08:05:57,146 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-11-07 08:05:57,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 103 [2021-11-07 08:06:12,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:06:12,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:06:12,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-07 08:06:12,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034821136] [2021-11-07 08:06:12,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:06:12,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:06:12,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:06:12,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=848, Unknown=10, NotChecked=0, Total=992 [2021-11-07 08:06:12,943 INFO L87 Difference]: Start difference. First operand 327 states and 386 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:06:20,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:06:20,295 INFO L93 Difference]: Finished difference Result 505 states and 594 transitions. [2021-11-07 08:06:20,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 08:06:20,296 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-11-07 08:06:20,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:06:20,298 INFO L225 Difference]: With dead ends: 505 [2021-11-07 08:06:20,298 INFO L226 Difference]: Without dead ends: 505 [2021-11-07 08:06:20,300 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=482, Invalid=2929, Unknown=11, NotChecked=0, Total=3422 [2021-11-07 08:06:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-11-07 08:06:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 321. [2021-11-07 08:06:20,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 297 states have (on average 1.2626262626262625) internal successors, (375), 317 states have internal predecessors, (375), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:06:20,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 378 transitions. [2021-11-07 08:06:20,309 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 378 transitions. Word has length 46 [2021-11-07 08:06:20,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:06:20,309 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 378 transitions. [2021-11-07 08:06:20,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:06:20,310 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 378 transitions. [2021-11-07 08:06:20,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 08:06:20,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:06:20,311 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:06:20,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:06:20,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-07 08:06:20,527 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr65ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:06:20,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:06:20,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1792660994, now seen corresponding path program 1 times [2021-11-07 08:06:20,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:06:20,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006870893] [2021-11-07 08:06:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:20,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:06:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:20,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:06:20,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:06:20,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:06:20,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006870893] [2021-11-07 08:06:20,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006870893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:20,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487181205] [2021-11-07 08:06:20,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:20,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:20,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:06:20,755 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:06:20,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:06:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:21,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 08:06:21,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:06:21,528 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:06:21,585 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:06:21,585 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 11 treesize of output 11 [2021-11-07 08:06:21,602 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 18 treesize of output 14 [2021-11-07 08:06:21,629 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 13 treesize of output 9 [2021-11-07 08:06:21,655 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 20 treesize of output 8 [2021-11-07 08:06:21,680 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 08:06:21,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-11-07 08:06:22,507 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 08:06:22,507 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 14 [2021-11-07 08:06:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:06:22,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487181205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:22,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:06:22,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-11-07 08:06:22,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866064092] [2021-11-07 08:06:22,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 08:06:22,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:06:22,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 08:06:22,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:06:22,513 INFO L87 Difference]: Start difference. First operand 321 states and 378 transitions. Second operand has 16 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:06:23,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:06:23,510 INFO L93 Difference]: Finished difference Result 345 states and 402 transitions. [2021-11-07 08:06:23,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 08:06:23,511 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-11-07 08:06:23,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:06:23,513 INFO L225 Difference]: With dead ends: 345 [2021-11-07 08:06:23,513 INFO L226 Difference]: Without dead ends: 345 [2021-11-07 08:06:23,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:06:23,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-11-07 08:06:23,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 329. [2021-11-07 08:06:23,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 305 states have (on average 1.259016393442623) internal successors, (384), 325 states have internal predecessors, (384), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:06:23,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 387 transitions. [2021-11-07 08:06:23,529 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 387 transitions. Word has length 47 [2021-11-07 08:06:23,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:06:23,530 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 387 transitions. [2021-11-07 08:06:23,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:06:23,530 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 387 transitions. [2021-11-07 08:06:23,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 08:06:23,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:06:23,532 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:06:23,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:06:23,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-07 08:06:23,747 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr56ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:06:23,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:06:23,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1483994339, now seen corresponding path program 1 times [2021-11-07 08:06:23,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:06:23,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968870534] [2021-11-07 08:06:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:23,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:06:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:24,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:06:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:24,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:06:24,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:06:24,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968870534] [2021-11-07 08:06:24,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968870534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:24,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084043320] [2021-11-07 08:06:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:24,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:24,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:06:24,243 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:06:24,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:06:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:25,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 08:06:25,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:06:25,087 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:06:25,139 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 13 treesize of output 9 [2021-11-07 08:06:25,162 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:06:25,162 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 11 treesize of output 11 [2021-11-07 08:06:25,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-07 08:06:25,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:06:25,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-07 08:06:25,229 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 20 treesize of output 8 [2021-11-07 08:06:25,266 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-07 08:06:25,266 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 29 treesize of output 17 [2021-11-07 08:06:25,379 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:06:25,380 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 11 treesize of output 11 [2021-11-07 08:06:25,428 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 [2021-11-07 08:06:25,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:06:25,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-07 08:06:25,562 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 08:06:25,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 52 [2021-11-07 08:06:25,579 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-07 08:06:25,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 34 [2021-11-07 08:06:25,664 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 08:06:25,664 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 17 [2021-11-07 08:06:25,749 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 25 treesize of output 13 [2021-11-07 08:06:25,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 08:06:25,866 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-11-07 08:06:25,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 29 [2021-11-07 08:06:25,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.base, main_~x~0.offset] [2021-11-07 08:06:25,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:06:25,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-07 08:06:25,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104732437] [2021-11-07 08:06:25,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:06:25,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:06:25,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:06:25,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:06:25,964 INFO L87 Difference]: Start difference. First operand 329 states and 387 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:06:27,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:06:27,345 INFO L93 Difference]: Finished difference Result 435 states and 505 transitions. [2021-11-07 08:06:27,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 08:06:27,346 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-11-07 08:06:27,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:06:27,348 INFO L225 Difference]: With dead ends: 435 [2021-11-07 08:06:27,349 INFO L226 Difference]: Without dead ends: 435 [2021-11-07 08:06:27,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=336, Invalid=1734, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:06:27,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-11-07 08:06:27,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 329. [2021-11-07 08:06:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 305 states have (on average 1.2557377049180327) internal successors, (383), 325 states have internal predecessors, (383), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:06:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 386 transitions. [2021-11-07 08:06:27,359 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 386 transitions. Word has length 48 [2021-11-07 08:06:27,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:06:27,360 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 386 transitions. [2021-11-07 08:06:27,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:06:27,360 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 386 transitions. [2021-11-07 08:06:27,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 08:06:27,361 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:06:27,361 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:06:27,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:06:27,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-07 08:06:27,578 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr66ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:06:27,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:06:27,578 INFO L85 PathProgramCache]: Analyzing trace with hash -262083778, now seen corresponding path program 1 times [2021-11-07 08:06:27,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:06:27,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734305723] [2021-11-07 08:06:27,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:27,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:06:27,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:27,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:06:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:06:27,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:06:27,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734305723] [2021-11-07 08:06:27,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734305723] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:27,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049079765] [2021-11-07 08:06:27,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:27,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:27,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:06:27,810 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:06:27,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 08:06:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:28,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 08:06:28,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:06:28,706 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:06:28,752 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:06:28,752 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 11 treesize of output 11 [2021-11-07 08:06:28,768 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 23 treesize of output 19 [2021-11-07 08:06:28,829 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 08:06:28,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-11-07 08:06:29,584 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 08:06:29,585 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2021-11-07 08:06:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:06:29,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049079765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:29,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:06:29,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-11-07 08:06:29,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481451773] [2021-11-07 08:06:29,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:06:29,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:06:29,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:06:29,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:06:29,593 INFO L87 Difference]: Start difference. First operand 329 states and 386 transitions. Second operand has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:06:30,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:06:30,553 INFO L93 Difference]: Finished difference Result 343 states and 399 transitions. [2021-11-07 08:06:30,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 08:06:30,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-11-07 08:06:30,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:06:30,555 INFO L225 Difference]: With dead ends: 343 [2021-11-07 08:06:30,555 INFO L226 Difference]: Without dead ends: 343 [2021-11-07 08:06:30,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:06:30,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-07 08:06:30,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 330. [2021-11-07 08:06:30,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 306 states have (on average 1.2549019607843137) internal successors, (384), 326 states have internal predecessors, (384), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:06:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 387 transitions. [2021-11-07 08:06:30,564 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 387 transitions. Word has length 48 [2021-11-07 08:06:30,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:06:30,564 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 387 transitions. [2021-11-07 08:06:30,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:06:30,565 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 387 transitions. [2021-11-07 08:06:30,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 08:06:30,566 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:06:30,566 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:06:30,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:06:30,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:30,791 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr56ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:06:30,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:06:30,791 INFO L85 PathProgramCache]: Analyzing trace with hash 856024357, now seen corresponding path program 1 times [2021-11-07 08:06:30,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:06:30,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689481944] [2021-11-07 08:06:30,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:30,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:06:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:31,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:06:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:06:31,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:06:31,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689481944] [2021-11-07 08:06:31,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689481944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:31,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222842704] [2021-11-07 08:06:31,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:31,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:31,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:06:31,459 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:06:31,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 08:06:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:32,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 08:06:32,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:06:32,385 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:06:32,428 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 13 treesize of output 9 [2021-11-07 08:06:32,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:06:32,510 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:06:32,510 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 11 treesize of output 11 [2021-11-07 08:06:32,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2021-11-07 08:06:32,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:06:32,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:06:32,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 20 [2021-11-07 08:06:32,556 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 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-07 08:06:32,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:06:32,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:06:32,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 24 [2021-11-07 08:06:32,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:06:32,704 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-07 08:06:32,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 58 [2021-11-07 08:06:32,719 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-07 08:06:32,720 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 61 treesize of output 56 [2021-11-07 08:06:33,065 INFO L354 Elim1Store]: treesize reduction 118, result has 21.3 percent of original size [2021-11-07 08:06:33,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 89 [2021-11-07 08:06:33,094 INFO L354 Elim1Store]: treesize reduction 86, result has 25.2 percent of original size [2021-11-07 08:06:33,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 97 [2021-11-07 08:06:33,297 INFO L354 Elim1Store]: treesize reduction 136, result has 15.0 percent of original size [2021-11-07 08:06:33,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 42 [2021-11-07 08:06:33,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:06:33,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-07 08:06:33,422 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:06:33,422 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 11 treesize of output 11 [2021-11-07 08:06:33,579 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-11-07 08:06:33,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 40 [2021-11-07 08:06:33,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:06:33,613 INFO L354 Elim1Store]: treesize reduction 98, result has 14.8 percent of original size [2021-11-07 08:06:33,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 55 [2021-11-07 08:06:41,665 INFO L354 Elim1Store]: treesize reduction 174, result has 19.8 percent of original size [2021-11-07 08:06:41,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 130 treesize of output 102 [2021-11-07 08:06:41,685 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-11-07 08:06:41,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 105 [2021-11-07 08:06:52,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:06:52,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:06:52,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-07 08:06:52,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558112908] [2021-11-07 08:06:52,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:06:52,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:06:52,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:06:52,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=621, Unknown=8, NotChecked=0, Total=756 [2021-11-07 08:06:52,868 INFO L87 Difference]: Start difference. First operand 330 states and 387 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:06:56,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:06:56,647 INFO L93 Difference]: Finished difference Result 482 states and 566 transitions. [2021-11-07 08:06:56,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:06:56,648 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-11-07 08:06:56,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:06:56,650 INFO L225 Difference]: With dead ends: 482 [2021-11-07 08:06:56,650 INFO L226 Difference]: Without dead ends: 482 [2021-11-07 08:06:56,651 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=275, Invalid=1522, Unknown=9, NotChecked=0, Total=1806 [2021-11-07 08:06:56,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-11-07 08:06:56,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 323. [2021-11-07 08:06:56,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 299 states have (on average 1.254180602006689) internal successors, (375), 319 states have internal predecessors, (375), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:06:56,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 378 transitions. [2021-11-07 08:06:56,660 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 378 transitions. Word has length 48 [2021-11-07 08:06:56,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:06:56,661 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 378 transitions. [2021-11-07 08:06:56,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:06:56,662 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 378 transitions. [2021-11-07 08:06:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 08:06:56,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:06:56,663 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:06:56,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 08:06:56,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:56,877 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:06:56,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:06:56,878 INFO L85 PathProgramCache]: Analyzing trace with hash 48803880, now seen corresponding path program 1 times [2021-11-07 08:06:56,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:06:56,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194643491] [2021-11-07 08:06:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:56,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:06:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:57,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:06:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:06:57,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:06:57,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194643491] [2021-11-07 08:06:57,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194643491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:57,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490374297] [2021-11-07 08:06:57,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:57,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:57,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:06:57,181 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:06:57,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 08:06:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:58,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 08:06:58,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:06:58,616 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:06:58,738 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 08:06:58,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-07 08:06:58,788 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 [2021-11-07 08:06:58,933 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 08:06:58,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-07 08:06:59,170 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-07 08:06:59,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 48 [2021-11-07 08:06:59,309 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-07 08:06:59,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 30 [2021-11-07 08:06:59,359 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-07 08:06:59,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 39 [2021-11-07 08:06:59,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:06:59,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:06:59,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-07 08:06:59,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212956650] [2021-11-07 08:06:59,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 08:06:59,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:06:59,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 08:06:59,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:06:59,456 INFO L87 Difference]: Start difference. First operand 323 states and 378 transitions. Second operand has 16 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:07:00,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:07:00,436 INFO L93 Difference]: Finished difference Result 492 states and 572 transitions. [2021-11-07 08:07:00,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 08:07:00,436 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-11-07 08:07:00,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:07:00,438 INFO L225 Difference]: With dead ends: 492 [2021-11-07 08:07:00,438 INFO L226 Difference]: Without dead ends: 492 [2021-11-07 08:07:00,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=1220, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 08:07:00,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-11-07 08:07:00,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 362. [2021-11-07 08:07:00,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 338 states have (on average 1.2485207100591715) internal successors, (422), 358 states have internal predecessors, (422), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:07:00,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 425 transitions. [2021-11-07 08:07:00,448 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 425 transitions. Word has length 48 [2021-11-07 08:07:00,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:07:00,449 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 425 transitions. [2021-11-07 08:07:00,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:07:00,449 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 425 transitions. [2021-11-07 08:07:00,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 08:07:00,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:07:00,451 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:07:00,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:07:00,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-07 08:07:00,663 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:07:00,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:07:00,663 INFO L85 PathProgramCache]: Analyzing trace with hash 48803881, now seen corresponding path program 1 times [2021-11-07 08:07:00,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:07:00,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564958713] [2021-11-07 08:07:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:07:00,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:07:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:07:01,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:07:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:07:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:07:01,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:07:01,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564958713] [2021-11-07 08:07:01,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564958713] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:07:01,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372286111] [2021-11-07 08:07:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:07:01,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:07:01,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:07:01,084 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:07:01,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 08:07:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:07:02,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 08:07:02,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:07:02,250 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:07:02,386 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:07:02,401 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:07:02,402 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 11 treesize of output 11 [2021-11-07 08:07:02,446 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 [2021-11-07 08:07:02,453 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 11 treesize of output 7 [2021-11-07 08:07:02,582 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 08:07:02,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-11-07 08:07:02,593 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-07 08:07:02,594 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 59 treesize of output 54 [2021-11-07 08:07:02,875 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-07 08:07:02,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 75 [2021-11-07 08:07:02,897 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-11-07 08:07:02,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 84 [2021-11-07 08:07:03,076 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-07 08:07:03,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 30 [2021-11-07 08:07:03,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:07:03,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:07:03,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-07 08:07:03,133 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-07 08:07:03,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 66 [2021-11-07 08:07:03,152 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 08:07:03,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 83 [2021-11-07 08:07:03,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:07:03,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:07:03,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-07 08:07:03,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141739548] [2021-11-07 08:07:03,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:07:03,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:07:03,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:07:03,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-11-07 08:07:03,276 INFO L87 Difference]: Start difference. First operand 362 states and 425 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:07:04,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:07:04,461 INFO L93 Difference]: Finished difference Result 555 states and 644 transitions. [2021-11-07 08:07:04,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 08:07:04,461 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-11-07 08:07:04,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:07:04,464 INFO L225 Difference]: With dead ends: 555 [2021-11-07 08:07:04,464 INFO L226 Difference]: Without dead ends: 555 [2021-11-07 08:07:04,464 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 08:07:04,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-07 08:07:04,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 412. [2021-11-07 08:07:04,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 388 states have (on average 1.2422680412371134) internal successors, (482), 408 states have internal predecessors, (482), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:07:04,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 485 transitions. [2021-11-07 08:07:04,472 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 485 transitions. Word has length 48 [2021-11-07 08:07:04,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:07:04,473 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 485 transitions. [2021-11-07 08:07:04,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:07:04,473 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 485 transitions. [2021-11-07 08:07:04,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 08:07:04,474 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:07:04,474 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:07:04,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:07:04,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-07 08:07:04,691 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr67ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:07:04,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:07:04,691 INFO L85 PathProgramCache]: Analyzing trace with hash 465337732, now seen corresponding path program 1 times [2021-11-07 08:07:04,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:07:04,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962043692] [2021-11-07 08:07:04,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:07:04,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:07:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:07:04,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:07:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:07:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:07:04,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:07:04,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962043692] [2021-11-07 08:07:04,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962043692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:07:04,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689000351] [2021-11-07 08:07:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:07:04,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:07:04,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:07:04,951 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:07:04,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 08:07:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:07:06,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 08:07:06,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:07:06,556 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 17 treesize of output 9 [2021-11-07 08:07:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:07:06,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689000351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:07:06,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:07:06,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-11-07 08:07:06,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691794634] [2021-11-07 08:07:06,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:07:06,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:07:06,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:07:06,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:07:06,565 INFO L87 Difference]: Start difference. First operand 412 states and 485 transitions. Second operand has 17 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:07:07,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:07:07,527 INFO L93 Difference]: Finished difference Result 530 states and 615 transitions. [2021-11-07 08:07:07,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:07:07,527 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-11-07 08:07:07,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:07:07,530 INFO L225 Difference]: With dead ends: 530 [2021-11-07 08:07:07,530 INFO L226 Difference]: Without dead ends: 530 [2021-11-07 08:07:07,530 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 08:07:07,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-07 08:07:07,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 496. [2021-11-07 08:07:07,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 472 states have (on average 1.2584745762711864) internal successors, (594), 492 states have internal predecessors, (594), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:07:07,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 597 transitions. [2021-11-07 08:07:07,540 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 597 transitions. Word has length 49 [2021-11-07 08:07:07,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:07:07,541 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 597 transitions. [2021-11-07 08:07:07,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:07:07,541 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 597 transitions. [2021-11-07 08:07:07,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 08:07:07,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:07:07,543 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:07:07,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 08:07:07,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-07 08:07:07,771 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:07:07,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:07:07,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1188303820, now seen corresponding path program 1 times [2021-11-07 08:07:07,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:07:07,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153000624] [2021-11-07 08:07:07,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:07:07,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:07:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:07:08,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:07:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:07:08,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:07:08,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:07:08,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153000624] [2021-11-07 08:07:08,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153000624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:07:08,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577655884] [2021-11-07 08:07:08,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:07:08,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:07:08,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:07:08,362 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:07:08,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 08:07:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:07:09,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 08:07:09,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:07:09,503 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:07:09,553 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 08:07:09,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-07 08:07:09,594 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 23 treesize of output 19 [2021-11-07 08:07:09,679 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 08:07:09,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-11-07 08:07:09,950 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-07 08:07:09,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-11-07 08:07:10,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:07:10,099 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-07 08:07:10,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 52 [2021-11-07 08:07:10,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:07:10,463 INFO L354 Elim1Store]: treesize reduction 116, result has 17.1 percent of original size [2021-11-07 08:07:10,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 64 [2021-11-07 08:07:10,919 INFO L354 Elim1Store]: treesize reduction 182, result has 17.6 percent of original size [2021-11-07 08:07:10,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 86 [2021-11-07 08:07:11,170 INFO L354 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2021-11-07 08:07:11,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 59 [2021-11-07 08:07:11,275 INFO L354 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2021-11-07 08:07:11,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 57 [2021-11-07 08:07:11,437 INFO L354 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2021-11-07 08:07:11,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 85 [2021-11-07 08:07:17,889 INFO L354 Elim1Store]: treesize reduction 260, result has 13.3 percent of original size [2021-11-07 08:07:17,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 178 treesize of output 104 [2021-11-07 08:07:34,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:07:34,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:07:34,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-07 08:07:34,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633564007] [2021-11-07 08:07:34,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 08:07:34,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:07:34,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 08:07:34,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1043, Unknown=12, NotChecked=0, Total=1260 [2021-11-07 08:07:34,817 INFO L87 Difference]: Start difference. First operand 496 states and 597 transitions. Second operand has 21 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:07:37,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:07:37,312 INFO L93 Difference]: Finished difference Result 897 states and 1093 transitions. [2021-11-07 08:07:37,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-07 08:07:37,313 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-07 08:07:37,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:07:37,317 INFO L225 Difference]: With dead ends: 897 [2021-11-07 08:07:37,317 INFO L226 Difference]: Without dead ends: 897 [2021-11-07 08:07:37,319 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1504 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=703, Invalid=4397, Unknown=12, NotChecked=0, Total=5112 [2021-11-07 08:07:37,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-11-07 08:07:37,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 516. [2021-11-07 08:07:37,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 492 states have (on average 1.2560975609756098) internal successors, (618), 512 states have internal predecessors, (618), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:07:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 621 transitions. [2021-11-07 08:07:37,329 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 621 transitions. Word has length 50 [2021-11-07 08:07:37,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:07:37,329 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 621 transitions. [2021-11-07 08:07:37,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:07:37,329 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 621 transitions. [2021-11-07 08:07:37,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 08:07:37,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:07:37,331 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:07:37,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 08:07:37,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-07 08:07:37,547 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting mainErr53REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:07:37,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:07:37,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1188303819, now seen corresponding path program 1 times [2021-11-07 08:07:37,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:07:37,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339904973] [2021-11-07 08:07:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:07:37,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:07:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:07:38,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:07:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:07:38,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:07:38,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:07:38,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339904973] [2021-11-07 08:07:38,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339904973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:07:38,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170656439] [2021-11-07 08:07:38,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:07:38,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:07:38,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:07:38,293 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:07:38,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 08:07:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:07:39,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-07 08:07:39,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:07:39,504 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:07:39,596 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 08:07:39,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-07 08:07:39,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:07:39,662 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 13 treesize of output 9 [2021-11-07 08:07:39,669 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 28 treesize of output 24 [2021-11-07 08:07:39,795 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 08:07:39,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 54 [2021-11-07 08:07:39,807 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-07 08:07:39,807 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 78 treesize of output 71 [2021-11-07 08:07:40,090 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-07 08:07:40,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 18 treesize of output 20 [2021-11-07 08:07:40,116 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-07 08:07:40,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-11-07 08:07:40,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:07:40,250 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-07 08:07:40,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 79 [2021-11-07 08:07:40,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:07:40,266 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-07 08:07:40,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 101 [2021-11-07 08:07:40,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:07:40,716 INFO L354 Elim1Store]: treesize reduction 116, result has 17.1 percent of original size [2021-11-07 08:07:40,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 137 treesize of output 100 [2021-11-07 08:07:40,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:07:40,767 INFO L354 Elim1Store]: treesize reduction 170, result has 15.0 percent of original size [2021-11-07 08:07:40,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 129 treesize of output 130 [2021-11-07 08:07:41,488 INFO L354 Elim1Store]: treesize reduction 182, result has 17.6 percent of original size [2021-11-07 08:07:41,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 153 treesize of output 129 [2021-11-07 08:07:41,553 INFO L354 Elim1Store]: treesize reduction 242, result has 16.8 percent of original size [2021-11-07 08:07:41,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 155 treesize of output 169 [2021-11-07 08:07:43,139 INFO L354 Elim1Store]: treesize reduction 208, result has 13.0 percent of original size [2021-11-07 08:07:43,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 157 treesize of output 117 [2021-11-07 08:07:43,182 INFO L354 Elim1Store]: treesize reduction 244, result has 13.2 percent of original size [2021-11-07 08:07:43,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 138 treesize of output 131 [2021-11-07 08:07:43,258 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:07:43,258 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 11 treesize of output 11 [2021-11-07 08:07:43,287 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-11-07 08:07:43,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 71 [2021-11-07 08:07:43,480 INFO L354 Elim1Store]: treesize reduction 184, result has 14.4 percent of original size [2021-11-07 08:07:43,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 154 treesize of output 129 [2021-11-07 08:07:43,536 INFO L354 Elim1Store]: treesize reduction 220, result has 14.4 percent of original size [2021-11-07 08:07:43,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 153 treesize of output 161 [2021-11-07 08:07:52,379 INFO L354 Elim1Store]: treesize reduction 250, result has 16.7 percent of original size [2021-11-07 08:07:52,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 211 treesize of output 147 [2021-11-07 08:07:52,434 INFO L354 Elim1Store]: treesize reduction 236, result has 14.8 percent of original size [2021-11-07 08:07:52,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 174 treesize of output 182 [2021-11-07 08:08:01,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:08:01,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:08:01,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-07 08:08:01,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809594591] [2021-11-07 08:08:01,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 08:08:01,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:01,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 08:08:01,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1098, Unknown=10, NotChecked=0, Total=1260 [2021-11-07 08:08:01,685 INFO L87 Difference]: Start difference. First operand 516 states and 621 transitions. Second operand has 21 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:04,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:04,212 INFO L93 Difference]: Finished difference Result 843 states and 1022 transitions. [2021-11-07 08:08:04,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 08:08:04,213 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-07 08:08:04,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:04,217 INFO L225 Difference]: With dead ends: 843 [2021-11-07 08:08:04,217 INFO L226 Difference]: Without dead ends: 843 [2021-11-07 08:08:04,219 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=457, Invalid=2838, Unknown=11, NotChecked=0, Total=3306 [2021-11-07 08:08:04,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-11-07 08:08:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 516. [2021-11-07 08:08:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 492 states have (on average 1.2540650406504066) internal successors, (617), 512 states have internal predecessors, (617), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 620 transitions. [2021-11-07 08:08:04,230 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 620 transitions. Word has length 50 [2021-11-07 08:08:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:04,230 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 620 transitions. [2021-11-07 08:08:04,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:04,231 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 620 transitions. [2021-11-07 08:08:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 08:08:04,232 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:04,232 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:04,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-07 08:08:04,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-07 08:08:04,435 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting mainErr71ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:08:04,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:04,435 INFO L85 PathProgramCache]: Analyzing trace with hash 2068221456, now seen corresponding path program 1 times [2021-11-07 08:08:04,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:04,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912795327] [2021-11-07 08:08:04,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:04,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:04,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:08:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:08:04,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:04,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912795327] [2021-11-07 08:08:04,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912795327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:04,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429760734] [2021-11-07 08:08:04,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:04,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:04,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:04,639 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:04,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 08:08:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:05,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 08:08:05,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:05,882 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:08:05,930 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 13 treesize of output 9 [2021-11-07 08:08:05,964 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:08:05,964 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 11 treesize of output 11 [2021-11-07 08:08:05,994 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 18 treesize of output 14 [2021-11-07 08:08:06,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:06,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-07 08:08:06,047 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 16 treesize of output 8 [2021-11-07 08:08:06,077 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 08:08:06,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-11-07 08:08:06,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:08:06,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-07 08:08:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:08:06,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429760734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:08:06,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:08:06,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2021-11-07 08:08:06,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661800000] [2021-11-07 08:08:06,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:08:06,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:06,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:08:06,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:08:06,239 INFO L87 Difference]: Start difference. First operand 516 states and 620 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:06,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:06,598 INFO L93 Difference]: Finished difference Result 526 states and 628 transitions. [2021-11-07 08:08:06,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:08:06,599 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-11-07 08:08:06,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:06,601 INFO L225 Difference]: With dead ends: 526 [2021-11-07 08:08:06,601 INFO L226 Difference]: Without dead ends: 525 [2021-11-07 08:08:06,602 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:08:06,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-07 08:08:06,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 516. [2021-11-07 08:08:06,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 492 states have (on average 1.2520325203252032) internal successors, (616), 512 states have internal predecessors, (616), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 619 transitions. [2021-11-07 08:08:06,610 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 619 transitions. Word has length 51 [2021-11-07 08:08:06,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:06,611 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 619 transitions. [2021-11-07 08:08:06,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 619 transitions. [2021-11-07 08:08:06,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:08:06,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:06,613 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:06,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:06,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-07 08:08:06,836 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting mainErr56ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:08:06,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:06,836 INFO L85 PathProgramCache]: Analyzing trace with hash -707453723, now seen corresponding path program 1 times [2021-11-07 08:08:06,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:06,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898768217] [2021-11-07 08:08:06,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:06,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:07,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:08:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:08:07,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:07,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898768217] [2021-11-07 08:08:07,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898768217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:07,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321785499] [2021-11-07 08:08:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:07,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:07,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:07,433 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:07,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 08:08:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:08,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-07 08:08:08,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:08,877 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:08:08,916 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 13 treesize of output 9 [2021-11-07 08:08:08,935 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:08:08,935 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 11 treesize of output 11 [2021-11-07 08:08:08,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:08,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-07 08:08:08,973 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 18 treesize of output 14 [2021-11-07 08:08:09,015 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 20 treesize of output 8 [2021-11-07 08:08:09,048 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-07 08:08:09,049 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 29 treesize of output 17 [2021-11-07 08:08:09,182 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:08:09,182 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 11 treesize of output 11 [2021-11-07 08:08:09,256 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 [2021-11-07 08:08:09,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:09,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-07 08:08:09,489 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 08:08:09,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 52 [2021-11-07 08:08:09,505 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-07 08:08:09,505 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 62 treesize of output 34 [2021-11-07 08:08:09,641 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 08:08:09,641 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 17 [2021-11-07 08:08:09,757 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 25 treesize of output 13 [2021-11-07 08:08:09,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 08:08:09,853 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:08:09,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-07 08:08:09,928 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-07 08:08:09,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2021-11-07 08:08:09,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-07 08:08:10,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-11-07 08:08:10,172 INFO L354 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2021-11-07 08:08:10,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 43 [2021-11-07 08:08:10,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-07 08:08:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:08:10,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321785499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:10,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:08:10,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2021-11-07 08:08:10,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021162348] [2021-11-07 08:08:10,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 08:08:10,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:10,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 08:08:10,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 08:08:10,350 INFO L87 Difference]: Start difference. First operand 516 states and 619 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:12,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:12,333 INFO L93 Difference]: Finished difference Result 708 states and 851 transitions. [2021-11-07 08:08:12,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 08:08:12,333 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-11-07 08:08:12,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:12,337 INFO L225 Difference]: With dead ends: 708 [2021-11-07 08:08:12,337 INFO L226 Difference]: Without dead ends: 708 [2021-11-07 08:08:12,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=535, Invalid=2887, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 08:08:12,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-11-07 08:08:12,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 516. [2021-11-07 08:08:12,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 492 states have (on average 1.25) internal successors, (615), 512 states have internal predecessors, (615), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 618 transitions. [2021-11-07 08:08:12,350 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 618 transitions. Word has length 52 [2021-11-07 08:08:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:12,351 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 618 transitions. [2021-11-07 08:08:12,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:12,351 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 618 transitions. [2021-11-07 08:08:12,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:08:12,352 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:12,352 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:12,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:12,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-07 08:08:12,554 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting mainErr70ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:08:12,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:12,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1277796251, now seen corresponding path program 1 times [2021-11-07 08:08:12,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:12,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727737883] [2021-11-07 08:08:12,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:12,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:12,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:08:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:08:12,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:12,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727737883] [2021-11-07 08:08:12,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727737883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:12,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315777645] [2021-11-07 08:08:12,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:12,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:12,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:12,797 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:12,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 08:08:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:14,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 08:08:14,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:14,312 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:08:14,356 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:08:14,356 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 11 treesize of output 11 [2021-11-07 08:08:14,367 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 18 treesize of output 14 [2021-11-07 08:08:14,431 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 08:08:14,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 24 [2021-11-07 08:08:14,901 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-11-07 08:08:14,902 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 22 [2021-11-07 08:08:14,967 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 08:08:14,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 27 [2021-11-07 08:08:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:08:15,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315777645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:15,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:08:15,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 22 [2021-11-07 08:08:15,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307814967] [2021-11-07 08:08:15,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 08:08:15,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:15,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 08:08:15,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:08:15,064 INFO L87 Difference]: Start difference. First operand 516 states and 618 transitions. Second operand has 23 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 states have internal predecessors, (92), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:16,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:16,009 INFO L93 Difference]: Finished difference Result 526 states and 625 transitions. [2021-11-07 08:08:16,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 08:08:16,010 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 states have internal predecessors, (92), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-11-07 08:08:16,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:16,012 INFO L225 Difference]: With dead ends: 526 [2021-11-07 08:08:16,013 INFO L226 Difference]: Without dead ends: 526 [2021-11-07 08:08:16,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-11-07 08:08:16,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-07 08:08:16,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 517. [2021-11-07 08:08:16,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 493 states have (on average 1.2494929006085194) internal successors, (616), 513 states have internal predecessors, (616), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:16,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 619 transitions. [2021-11-07 08:08:16,025 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 619 transitions. Word has length 52 [2021-11-07 08:08:16,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:16,025 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 619 transitions. [2021-11-07 08:08:16,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 states have internal predecessors, (92), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:16,026 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 619 transitions. [2021-11-07 08:08:16,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:08:16,027 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:16,027 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:16,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:16,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-07 08:08:16,243 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:08:16,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:16,243 INFO L85 PathProgramCache]: Analyzing trace with hash -853180944, now seen corresponding path program 1 times [2021-11-07 08:08:16,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:16,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415330300] [2021-11-07 08:08:16,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:16,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:16,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:08:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:08:16,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:16,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415330300] [2021-11-07 08:08:16,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415330300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:16,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364119843] [2021-11-07 08:08:16,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:16,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:16,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:16,647 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:16,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 08:08:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:18,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 08:08:18,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:18,262 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:08:18,396 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:08:18,397 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 11 treesize of output 11 [2021-11-07 08:08:18,440 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 [2021-11-07 08:08:18,578 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 08:08:18,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-11-07 08:08:18,789 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-07 08:08:18,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 43 [2021-11-07 08:08:18,894 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-07 08:08:18,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-07 08:08:18,919 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:08:18,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-07 08:08:18,982 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-07 08:08:18,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 08:08:19,174 INFO L354 Elim1Store]: treesize reduction 104, result has 24.6 percent of original size [2021-11-07 08:08:19,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 63 [2021-11-07 08:08:21,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:08:21,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:08:21,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-07 08:08:21,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152622400] [2021-11-07 08:08:21,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:08:21,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:21,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:08:21,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=756, Unknown=1, NotChecked=0, Total=870 [2021-11-07 08:08:21,552 INFO L87 Difference]: Start difference. First operand 517 states and 619 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:22,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:22,693 INFO L93 Difference]: Finished difference Result 725 states and 868 transitions. [2021-11-07 08:08:22,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 08:08:22,693 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-11-07 08:08:22,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:22,696 INFO L225 Difference]: With dead ends: 725 [2021-11-07 08:08:22,697 INFO L226 Difference]: Without dead ends: 725 [2021-11-07 08:08:22,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=298, Invalid=1957, Unknown=1, NotChecked=0, Total=2256 [2021-11-07 08:08:22,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-11-07 08:08:22,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 544. [2021-11-07 08:08:22,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 520 states have (on average 1.251923076923077) internal successors, (651), 540 states have internal predecessors, (651), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:22,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 654 transitions. [2021-11-07 08:08:22,717 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 654 transitions. Word has length 52 [2021-11-07 08:08:22,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:22,717 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 654 transitions. [2021-11-07 08:08:22,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:22,718 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 654 transitions. [2021-11-07 08:08:22,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:08:22,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:22,719 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:22,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:22,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:22,944 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:08:22,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:22,944 INFO L85 PathProgramCache]: Analyzing trace with hash -853180943, now seen corresponding path program 1 times [2021-11-07 08:08:22,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:22,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145220904] [2021-11-07 08:08:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:22,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:23,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:08:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:08:23,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:23,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145220904] [2021-11-07 08:08:23,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145220904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:23,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961620354] [2021-11-07 08:08:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:23,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:23,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:23,584 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:23,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 08:08:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:25,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-07 08:08:25,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:25,127 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:08:25,281 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 08:08:25,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-07 08:08:25,356 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 11 treesize of output 7 [2021-11-07 08:08:25,361 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 [2021-11-07 08:08:25,520 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 08:08:25,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-11-07 08:08:25,532 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-07 08:08:25,532 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 59 treesize of output 54 [2021-11-07 08:08:25,842 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-07 08:08:25,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 75 [2021-11-07 08:08:25,862 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-07 08:08:25,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 68 [2021-11-07 08:08:26,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:26,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-07 08:08:26,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:26,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-07 08:08:26,120 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 08:08:26,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-07 08:08:26,155 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-07 08:08:26,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-07 08:08:26,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:26,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 43 [2021-11-07 08:08:26,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:26,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-07 08:08:26,518 INFO L354 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2021-11-07 08:08:26,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 161 treesize of output 92 [2021-11-07 08:08:26,539 INFO L354 Elim1Store]: treesize reduction 116, result has 14.1 percent of original size [2021-11-07 08:08:26,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 139 [2021-11-07 08:08:26,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:08:26,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:08:26,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-07 08:08:26,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868400671] [2021-11-07 08:08:26,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:08:26,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:26,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:08:26,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:08:26,802 INFO L87 Difference]: Start difference. First operand 544 states and 654 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:28,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:28,353 INFO L93 Difference]: Finished difference Result 818 states and 973 transitions. [2021-11-07 08:08:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 08:08:28,353 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-11-07 08:08:28,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:28,356 INFO L225 Difference]: With dead ends: 818 [2021-11-07 08:08:28,356 INFO L226 Difference]: Without dead ends: 818 [2021-11-07 08:08:28,357 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=242, Invalid=1920, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 08:08:28,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-11-07 08:08:28,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 486. [2021-11-07 08:08:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 462 states have (on average 1.2575757575757576) internal successors, (581), 482 states have internal predecessors, (581), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:28,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 584 transitions. [2021-11-07 08:08:28,365 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 584 transitions. Word has length 52 [2021-11-07 08:08:28,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:28,365 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 584 transitions. [2021-11-07 08:08:28,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:28,365 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 584 transitions. [2021-11-07 08:08:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 08:08:28,366 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:28,366 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:28,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:28,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-07 08:08:28,579 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting mainErr56ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:08:28,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:28,579 INFO L85 PathProgramCache]: Analyzing trace with hash 503700833, now seen corresponding path program 1 times [2021-11-07 08:08:28,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:28,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917764066] [2021-11-07 08:08:28,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:28,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:29,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:08:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:08:29,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:29,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917764066] [2021-11-07 08:08:29,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917764066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:29,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305801690] [2021-11-07 08:08:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:29,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:29,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:29,653 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:29,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 08:08:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:31,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-07 08:08:31,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:31,255 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:08:31,308 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 08:08:31,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-07 08:08:31,357 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 23 treesize of output 19 [2021-11-07 08:08:31,364 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 13 treesize of output 9 [2021-11-07 08:08:31,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:31,440 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2021-11-07 08:08:31,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:31,444 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 67 treesize of output 60 [2021-11-07 08:08:31,601 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-07 08:08:31,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-11-07 08:08:31,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:31,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:31,688 INFO L354 Elim1Store]: treesize reduction 43, result has 23.2 percent of original size [2021-11-07 08:08:31,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 84 [2021-11-07 08:08:31,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:31,701 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-07 08:08:31,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 64 [2021-11-07 08:08:31,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:31,926 INFO L354 Elim1Store]: treesize reduction 146, result has 17.0 percent of original size [2021-11-07 08:08:31,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 89 [2021-11-07 08:08:31,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:31,946 INFO L354 Elim1Store]: treesize reduction 96, result has 19.3 percent of original size [2021-11-07 08:08:31,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 100 [2021-11-07 08:08:32,393 INFO L354 Elim1Store]: treesize reduction 218, result has 17.1 percent of original size [2021-11-07 08:08:32,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 134 treesize of output 120 [2021-11-07 08:08:32,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:32,431 INFO L354 Elim1Store]: treesize reduction 152, result has 21.6 percent of original size [2021-11-07 08:08:32,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 141 [2021-11-07 08:08:32,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:32,751 INFO L354 Elim1Store]: treesize reduction 194, result has 13.8 percent of original size [2021-11-07 08:08:32,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 132 treesize of output 102 [2021-11-07 08:08:32,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:32,777 INFO L354 Elim1Store]: treesize reduction 150, result has 16.7 percent of original size [2021-11-07 08:08:32,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 95 [2021-11-07 08:08:32,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:32,916 INFO L354 Elim1Store]: treesize reduction 170, result has 15.4 percent of original size [2021-11-07 08:08:32,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 141 treesize of output 105 [2021-11-07 08:08:32,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:32,949 INFO L354 Elim1Store]: treesize reduction 160, result has 17.5 percent of original size [2021-11-07 08:08:32,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 134 [2021-11-07 08:08:33,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:08:33,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:08:33,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-07 08:08:33,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079734352] [2021-11-07 08:08:33,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 08:08:33,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:33,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 08:08:33,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 08:08:33,408 INFO L87 Difference]: Start difference. First operand 486 states and 584 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:38,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:38,247 INFO L93 Difference]: Finished difference Result 702 states and 847 transitions. [2021-11-07 08:08:38,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 08:08:38,247 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-11-07 08:08:38,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:38,250 INFO L225 Difference]: With dead ends: 702 [2021-11-07 08:08:38,251 INFO L226 Difference]: Without dead ends: 702 [2021-11-07 08:08:38,251 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=313, Invalid=1847, Unknown=2, NotChecked=0, Total=2162 [2021-11-07 08:08:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-11-07 08:08:38,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 502. [2021-11-07 08:08:38,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 478 states have (on average 1.2531380753138075) internal successors, (599), 498 states have internal predecessors, (599), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:38,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 602 transitions. [2021-11-07 08:08:38,261 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 602 transitions. Word has length 53 [2021-11-07 08:08:38,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:38,261 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 602 transitions. [2021-11-07 08:08:38,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:38,262 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 602 transitions. [2021-11-07 08:08:38,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 08:08:38,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:38,263 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:38,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:38,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:38,474 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting mainErr71ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:08:38,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:38,475 INFO L85 PathProgramCache]: Analyzing trace with hash -532732661, now seen corresponding path program 1 times [2021-11-07 08:08:38,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:38,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298992417] [2021-11-07 08:08:38,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:38,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:39,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:08:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:08:39,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:39,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298992417] [2021-11-07 08:08:39,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298992417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:39,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336951278] [2021-11-07 08:08:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:39,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:39,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:39,039 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:39,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 08:08:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:40,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 08:08:40,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:40,707 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 31 treesize of output 27 [2021-11-07 08:08:40,809 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 08:08:40,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 37 [2021-11-07 08:08:41,529 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-11-07 08:08:41,529 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 35 [2021-11-07 08:08:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:08:41,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336951278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:41,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:08:41,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-11-07 08:08:41,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439247600] [2021-11-07 08:08:41,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 08:08:41,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:41,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 08:08:41,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:08:41,935 INFO L87 Difference]: Start difference. First operand 502 states and 602 transitions. Second operand has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 26 states have internal predecessors, (103), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:43,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:43,442 INFO L93 Difference]: Finished difference Result 508 states and 607 transitions. [2021-11-07 08:08:43,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:08:43,443 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 26 states have internal predecessors, (103), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-11-07 08:08:43,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:43,444 INFO L225 Difference]: With dead ends: 508 [2021-11-07 08:08:43,444 INFO L226 Difference]: Without dead ends: 473 [2021-11-07 08:08:43,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 08:08:43,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-11-07 08:08:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 473. [2021-11-07 08:08:43,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 449 states have (on average 1.2672605790645879) internal successors, (569), 469 states have internal predecessors, (569), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:43,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 572 transitions. [2021-11-07 08:08:43,450 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 572 transitions. Word has length 55 [2021-11-07 08:08:43,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:43,450 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 572 transitions. [2021-11-07 08:08:43,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 26 states have internal predecessors, (103), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:08:43,450 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 572 transitions. [2021-11-07 08:08:43,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 08:08:43,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:43,456 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:43,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:43,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:43,671 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:08:43,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:43,671 INFO L85 PathProgramCache]: Analyzing trace with hash -728551564, now seen corresponding path program 1 times [2021-11-07 08:08:43,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:43,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427122438] [2021-11-07 08:08:43,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:43,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:44,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:08:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:08:44,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:44,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427122438] [2021-11-07 08:08:44,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427122438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:44,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924440665] [2021-11-07 08:08:44,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:44,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:44,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:44,281 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:44,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 08:08:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:45,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 08:08:45,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:46,072 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 08:08:46,072 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 19 treesize of output 18 [2021-11-07 08:08:46,098 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-07 08:08:46,098 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 19 treesize of output 26 [2021-11-07 08:08:46,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:46,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:46,291 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 08:08:46,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-07 08:08:46,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:46,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:46,314 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 08:08:46,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-07 08:08:46,367 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-07 08:08:46,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 76 [2021-11-07 08:08:46,397 INFO L354 Elim1Store]: treesize reduction 92, result has 17.1 percent of original size [2021-11-07 08:08:46,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-07 08:08:47,312 INFO L354 Elim1Store]: treesize reduction 93, result has 25.6 percent of original size [2021-11-07 08:08:47,312 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 165 treesize of output 132 [2021-11-07 08:08:48,658 INFO L354 Elim1Store]: treesize reduction 105, result has 13.2 percent of original size [2021-11-07 08:08:48,658 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 59 [2021-11-07 08:08:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:08:48,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924440665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:48,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:08:48,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 28 [2021-11-07 08:08:48,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302893095] [2021-11-07 08:08:48,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 08:08:48,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:48,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 08:08:48,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:08:48,703 INFO L87 Difference]: Start difference. First operand 473 states and 572 transitions. Second operand has 29 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:09:07,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:07,543 INFO L93 Difference]: Finished difference Result 814 states and 985 transitions. [2021-11-07 08:09:07,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 08:09:07,543 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-11-07 08:09:07,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:07,546 INFO L225 Difference]: With dead ends: 814 [2021-11-07 08:09:07,546 INFO L226 Difference]: Without dead ends: 814 [2021-11-07 08:09:07,546 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=350, Invalid=2302, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 08:09:07,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-11-07 08:09:07,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 536. [2021-11-07 08:09:07,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 512 states have (on average 1.26171875) internal successors, (646), 532 states have internal predecessors, (646), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:09:07,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 649 transitions. [2021-11-07 08:09:07,559 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 649 transitions. Word has length 56 [2021-11-07 08:09:07,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:07,559 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 649 transitions. [2021-11-07 08:09:07,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:09:07,559 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 649 transitions. [2021-11-07 08:09:07,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 08:09:07,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:07,561 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:07,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:07,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:07,781 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting mainErr53REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:09:07,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:07,782 INFO L85 PathProgramCache]: Analyzing trace with hash -728551563, now seen corresponding path program 1 times [2021-11-07 08:09:07,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:07,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532662997] [2021-11-07 08:09:07,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:07,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:08,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:09:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:08,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:08,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532662997] [2021-11-07 08:09:08,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532662997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:08,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596081421] [2021-11-07 08:09:08,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:08,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:08,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:08,363 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:08,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 08:09:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:10,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-07 08:09:10,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:10,213 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:09:10,287 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:09:10,298 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:09:10,299 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 11 treesize of output 11 [2021-11-07 08:09:10,340 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 11 treesize of output 7 [2021-11-07 08:09:10,347 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 [2021-11-07 08:09:10,483 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 08:09:10,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-11-07 08:09:10,497 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-07 08:09:10,497 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 59 treesize of output 54 [2021-11-07 08:09:10,881 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-07 08:09:10,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 82 [2021-11-07 08:09:10,907 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-07 08:09:10,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 71 [2021-11-07 08:09:11,108 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-07 08:09:11,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-07 08:09:11,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:09:11,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 24 [2021-11-07 08:09:11,224 INFO L354 Elim1Store]: treesize reduction 92, result has 17.1 percent of original size [2021-11-07 08:09:11,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 81 [2021-11-07 08:09:11,240 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-07 08:09:11,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 80 [2021-11-07 08:09:12,220 INFO L354 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2021-11-07 08:09:12,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 102 treesize of output 69 [2021-11-07 08:09:12,245 INFO L354 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2021-11-07 08:09:12,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 35 [2021-11-07 08:09:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:12,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596081421] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:12,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:12,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 34 [2021-11-07 08:09:12,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598756624] [2021-11-07 08:09:12,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 08:09:12,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:12,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 08:09:12,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 08:09:12,333 INFO L87 Difference]: Start difference. First operand 536 states and 649 transitions. Second operand has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 33 states have internal predecessors, (95), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:09:30,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:30,459 INFO L93 Difference]: Finished difference Result 800 states and 959 transitions. [2021-11-07 08:09:30,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 08:09:30,460 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 33 states have internal predecessors, (95), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-11-07 08:09:30,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:30,462 INFO L225 Difference]: With dead ends: 800 [2021-11-07 08:09:30,463 INFO L226 Difference]: Without dead ends: 800 [2021-11-07 08:09:30,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=553, Invalid=4139, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 08:09:30,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-11-07 08:09:30,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 530. [2021-11-07 08:09:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 506 states have (on average 1.2529644268774704) internal successors, (634), 526 states have internal predecessors, (634), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:09:30,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 637 transitions. [2021-11-07 08:09:30,470 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 637 transitions. Word has length 56 [2021-11-07 08:09:30,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:30,470 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 637 transitions. [2021-11-07 08:09:30,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 33 states have internal predecessors, (95), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:09:30,471 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 637 transitions. [2021-11-07 08:09:30,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 08:09:30,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:30,472 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2021-11-07 08:09:30,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:30,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-07 08:09:30,695 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting mainErr56ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:09:30,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:30,695 INFO L85 PathProgramCache]: Analyzing trace with hash -855070567, now seen corresponding path program 1 times [2021-11-07 08:09:30,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:30,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872525287] [2021-11-07 08:09:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:30,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:31,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:09:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:31,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:31,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872525287] [2021-11-07 08:09:31,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872525287] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:31,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573990789] [2021-11-07 08:09:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:31,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:31,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:31,698 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:31,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 08:09:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:33,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-07 08:09:33,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:33,538 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:09:33,584 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 08:09:33,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-07 08:09:33,633 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 13 treesize of output 9 [2021-11-07 08:09:33,637 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 23 treesize of output 19 [2021-11-07 08:09:33,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:33,723 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2021-11-07 08:09:33,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:33,727 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 67 treesize of output 60 [2021-11-07 08:09:33,867 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-07 08:09:33,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-11-07 08:09:33,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:33,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:33,961 INFO L354 Elim1Store]: treesize reduction 43, result has 23.2 percent of original size [2021-11-07 08:09:33,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 84 [2021-11-07 08:09:33,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:33,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:33,973 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 08:09:33,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 58 [2021-11-07 08:09:34,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:34,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:34,223 INFO L354 Elim1Store]: treesize reduction 102, result has 19.0 percent of original size [2021-11-07 08:09:34,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 110 treesize of output 83 [2021-11-07 08:09:34,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:34,242 INFO L354 Elim1Store]: treesize reduction 96, result has 19.3 percent of original size [2021-11-07 08:09:34,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 100 [2021-11-07 08:09:34,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:34,684 INFO L354 Elim1Store]: treesize reduction 168, result has 18.8 percent of original size [2021-11-07 08:09:34,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 128 treesize of output 114 [2021-11-07 08:09:34,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:34,741 INFO L354 Elim1Store]: treesize reduction 152, result has 21.6 percent of original size [2021-11-07 08:09:34,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 130 treesize of output 141 [2021-11-07 08:09:34,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:34,979 INFO L354 Elim1Store]: treesize reduction 150, result has 16.7 percent of original size [2021-11-07 08:09:34,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 132 treesize of output 122 [2021-11-07 08:09:34,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:35,013 INFO L354 Elim1Store]: treesize reduction 194, result has 13.8 percent of original size [2021-11-07 08:09:35,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 113 treesize of output 83 [2021-11-07 08:09:35,077 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:09:35,077 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 11 treesize of output 11 [2021-11-07 08:09:35,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:35,213 INFO L354 Elim1Store]: treesize reduction 170, result has 15.4 percent of original size [2021-11-07 08:09:35,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 124 treesize of output 109 [2021-11-07 08:09:35,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:35,249 INFO L354 Elim1Store]: treesize reduction 132, result has 18.5 percent of original size [2021-11-07 08:09:35,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 117 treesize of output 122 [2021-11-07 08:09:35,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:35,751 INFO L354 Elim1Store]: treesize reduction 236, result has 17.5 percent of original size [2021-11-07 08:09:35,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 204 treesize of output 151 [2021-11-07 08:09:35,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:35,795 INFO L354 Elim1Store]: treesize reduction 244, result has 16.2 percent of original size [2021-11-07 08:09:35,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 187 treesize of output 168 [2021-11-07 08:09:46,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:09:46,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:09:46,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-07 08:09:46,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654560262] [2021-11-07 08:09:46,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 08:09:46,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:46,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 08:09:46,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1253, Unknown=3, NotChecked=0, Total=1406 [2021-11-07 08:09:46,019 INFO L87 Difference]: Start difference. First operand 530 states and 637 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:09:52,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:52,606 INFO L93 Difference]: Finished difference Result 866 states and 1043 transitions. [2021-11-07 08:09:52,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-07 08:09:52,607 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-11-07 08:09:52,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:52,610 INFO L225 Difference]: With dead ends: 866 [2021-11-07 08:09:52,610 INFO L226 Difference]: Without dead ends: 866 [2021-11-07 08:09:52,611 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=684, Invalid=4423, Unknown=5, NotChecked=0, Total=5112 [2021-11-07 08:09:52,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2021-11-07 08:09:52,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 527. [2021-11-07 08:09:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 503 states have (on average 1.2504970178926442) internal successors, (629), 523 states have internal predecessors, (629), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:09:52,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 632 transitions. [2021-11-07 08:09:52,617 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 632 transitions. Word has length 57 [2021-11-07 08:09:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:52,618 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 632 transitions. [2021-11-07 08:09:52,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:09:52,618 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 632 transitions. [2021-11-07 08:09:52,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 08:09:52,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:52,619 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:52,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:52,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-07 08:09:52,819 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:09:52,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:52,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1497663785, now seen corresponding path program 2 times [2021-11-07 08:09:52,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:52,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188393014] [2021-11-07 08:09:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:52,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:53,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:09:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:53,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:53,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188393014] [2021-11-07 08:09:53,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188393014] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:53,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500146825] [2021-11-07 08:09:53,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:09:53,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:53,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:53,491 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:53,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 08:09:55,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:09:55,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:55,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-07 08:09:55,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:55,447 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:09:55,491 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 13 treesize of output 9 [2021-11-07 08:09:55,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:55,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-07 08:09:55,608 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:09:55,608 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 11 treesize of output 11 [2021-11-07 08:09:55,651 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 [2021-11-07 08:09:55,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:55,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-07 08:09:55,787 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 08:09:55,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 52 [2021-11-07 08:09:55,797 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-07 08:09:55,797 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 62 treesize of output 34 [2021-11-07 08:09:55,886 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 08:09:55,886 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 17 [2021-11-07 08:09:55,967 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 25 treesize of output 13 [2021-11-07 08:09:56,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 08:09:56,126 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-07 08:09:56,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2021-11-07 08:09:56,169 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-07 08:09:56,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-07 08:09:56,231 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 08:09:56,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-11-07 08:09:56,239 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 20 treesize of output 16 [2021-11-07 08:09:56,378 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 08:09:56,379 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 65 [2021-11-07 08:09:56,396 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-11-07 08:09:56,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 54 [2021-11-07 08:09:56,492 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 08:09:56,492 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 31 [2021-11-07 08:09:56,640 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-07 08:09:56,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 33 [2021-11-07 08:09:56,811 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-07 08:09:56,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 42 [2021-11-07 08:09:56,909 INFO L354 Elim1Store]: treesize reduction 160, result has 14.9 percent of original size [2021-11-07 08:09:56,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 49 [2021-11-07 08:09:57,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.base, main_~x~0.offset] [2021-11-07 08:09:57,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:09:57,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-07 08:09:57,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241348386] [2021-11-07 08:09:57,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 08:09:57,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:57,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 08:09:57,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:09:57,201 INFO L87 Difference]: Start difference. First operand 527 states and 632 transitions. Second operand has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:09:58,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:58,300 INFO L93 Difference]: Finished difference Result 848 states and 1022 transitions. [2021-11-07 08:09:58,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 08:09:58,301 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-11-07 08:09:58,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:58,304 INFO L225 Difference]: With dead ends: 848 [2021-11-07 08:09:58,304 INFO L226 Difference]: Without dead ends: 848 [2021-11-07 08:09:58,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=441, Invalid=3099, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 08:09:58,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-11-07 08:09:58,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 555. [2021-11-07 08:09:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 531 states have (on average 1.2485875706214689) internal successors, (663), 551 states have internal predecessors, (663), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:09:58,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 666 transitions. [2021-11-07 08:09:58,315 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 666 transitions. Word has length 57 [2021-11-07 08:09:58,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:58,315 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 666 transitions. [2021-11-07 08:09:58,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:09:58,315 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 666 transitions. [2021-11-07 08:09:58,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 08:09:58,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:58,316 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:58,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:58,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:58,535 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting mainErr53REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:09:58,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:58,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1497663784, now seen corresponding path program 2 times [2021-11-07 08:09:58,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:58,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181460441] [2021-11-07 08:09:58,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:58,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:59,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:09:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:59,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:59,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181460441] [2021-11-07 08:09:59,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181460441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:59,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109541509] [2021-11-07 08:09:59,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:09:59,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:59,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:59,127 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:59,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 08:10:01,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:10:01,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:01,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-07 08:10:01,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:01,174 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:10:01,206 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 13 treesize of output 9 [2021-11-07 08:10:01,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:01,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-07 08:10:01,289 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:10:01,289 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 11 treesize of output 11 [2021-11-07 08:10:01,338 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 [2021-11-07 08:10:01,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:01,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-07 08:10:01,472 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 08:10:01,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 52 [2021-11-07 08:10:01,482 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-07 08:10:01,482 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 62 treesize of output 34 [2021-11-07 08:10:01,567 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 08:10:01,568 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 17 [2021-11-07 08:10:01,643 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 25 treesize of output 13 [2021-11-07 08:10:01,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 08:10:01,802 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-07 08:10:01,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2021-11-07 08:10:01,864 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-07 08:10:01,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-07 08:10:01,925 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 08:10:01,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-11-07 08:10:01,933 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 20 treesize of output 16 [2021-11-07 08:10:02,086 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 08:10:02,087 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 65 [2021-11-07 08:10:02,103 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-11-07 08:10:02,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 54 [2021-11-07 08:10:02,200 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 08:10:02,201 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 31 [2021-11-07 08:10:02,332 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-07 08:10:02,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 33 [2021-11-07 08:10:02,463 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-07 08:10:02,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 42 [2021-11-07 08:10:02,587 INFO L354 Elim1Store]: treesize reduction 160, result has 14.9 percent of original size [2021-11-07 08:10:02,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 49 [2021-11-07 08:10:02,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.base, main_~x~0.offset] [2021-11-07 08:10:02,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:10:02,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-07 08:10:02,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172036247] [2021-11-07 08:10:02,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 08:10:02,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:02,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 08:10:02,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1348, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 08:10:02,844 INFO L87 Difference]: Start difference. First operand 555 states and 666 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:10:04,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:04,269 INFO L93 Difference]: Finished difference Result 776 states and 917 transitions. [2021-11-07 08:10:04,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 08:10:04,269 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-11-07 08:10:04,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:04,272 INFO L225 Difference]: With dead ends: 776 [2021-11-07 08:10:04,273 INFO L226 Difference]: Without dead ends: 776 [2021-11-07 08:10:04,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=576, Invalid=3456, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 08:10:04,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-11-07 08:10:04,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 602. [2021-11-07 08:10:04,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 578 states have (on average 1.2387543252595157) internal successors, (716), 598 states have internal predecessors, (716), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:10:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 719 transitions. [2021-11-07 08:10:04,280 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 719 transitions. Word has length 57 [2021-11-07 08:10:04,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:04,280 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 719 transitions. [2021-11-07 08:10:04,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:10:04,281 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 719 transitions. [2021-11-07 08:10:04,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 08:10:04,282 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:04,282 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:04,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:04,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:04,496 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting mainErr53REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:10:04,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:04,496 INFO L85 PathProgramCache]: Analyzing trace with hash -212915744, now seen corresponding path program 1 times [2021-11-07 08:10:04,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:04,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406566206] [2021-11-07 08:10:04,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:04,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:05,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:10:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:10:05,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:05,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406566206] [2021-11-07 08:10:05,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406566206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:05,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138897059] [2021-11-07 08:10:05,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:05,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:05,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:05,115 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:05,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 08:10:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:07,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-07 08:10:07,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:07,172 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:10:07,213 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 13 treesize of output 9 [2021-11-07 08:10:07,216 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 13 treesize of output 9 [2021-11-07 08:10:07,353 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:10:07,353 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 11 treesize of output 11 [2021-11-07 08:10:07,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:07,412 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 25 treesize of output 24 [2021-11-07 08:10:07,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:07,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 08:10:07,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:07,595 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-07 08:10:07,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 65 [2021-11-07 08:10:07,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:07,613 INFO L354 Elim1Store]: treesize reduction 78, result has 17.9 percent of original size [2021-11-07 08:10:07,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 66 [2021-11-07 08:10:08,013 INFO L354 Elim1Store]: treesize reduction 118, result has 21.3 percent of original size [2021-11-07 08:10:08,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 94 [2021-11-07 08:10:08,044 INFO L354 Elim1Store]: treesize reduction 138, result has 20.7 percent of original size [2021-11-07 08:10:08,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 105 [2021-11-07 08:10:09,291 INFO L354 Elim1Store]: treesize reduction 136, result has 15.0 percent of original size [2021-11-07 08:10:09,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 82 [2021-11-07 08:10:09,321 INFO L354 Elim1Store]: treesize reduction 136, result has 15.0 percent of original size [2021-11-07 08:10:09,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 63 [2021-11-07 08:10:10,412 INFO L354 Elim1Store]: treesize reduction 118, result has 16.9 percent of original size [2021-11-07 08:10:10,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 85 [2021-11-07 08:10:10,436 INFO L354 Elim1Store]: treesize reduction 118, result has 16.9 percent of original size [2021-11-07 08:10:10,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 85 [2021-11-07 08:10:11,620 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-07 08:10:11,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-11-07 08:10:11,753 INFO L354 Elim1Store]: treesize reduction 152, result has 14.6 percent of original size [2021-11-07 08:10:11,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 106 treesize of output 103 [2021-11-07 08:10:11,780 INFO L354 Elim1Store]: treesize reduction 152, result has 14.6 percent of original size [2021-11-07 08:10:11,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 92 treesize of output 93 [2021-11-07 08:10:12,052 INFO L354 Elim1Store]: treesize reduction 144, result has 18.6 percent of original size [2021-11-07 08:10:12,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 103 [2021-11-07 08:10:12,080 INFO L354 Elim1Store]: treesize reduction 130, result has 16.7 percent of original size [2021-11-07 08:10:12,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 104 treesize of output 105 [2021-11-07 08:10:32,980 INFO L354 Elim1Store]: treesize reduction 268, result has 15.2 percent of original size [2021-11-07 08:10:32,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 166 treesize of output 133 [2021-11-07 08:10:33,034 INFO L354 Elim1Store]: treesize reduction 266, result has 16.6 percent of original size [2021-11-07 08:10:33,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 168 treesize of output 182 [2021-11-07 08:10:37,463 INFO L354 Elim1Store]: treesize reduction 302, result has 11.7 percent of original size [2021-11-07 08:10:37,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 158 treesize of output 121 [2021-11-07 08:10:37,505 INFO L354 Elim1Store]: treesize reduction 244, result has 13.2 percent of original size [2021-11-07 08:10:37,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 139 treesize of output 132 [2021-11-07 08:10:39,805 INFO L354 Elim1Store]: treesize reduction 272, result has 12.8 percent of original size [2021-11-07 08:10:39,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 191 treesize of output 124 [2021-11-07 08:10:39,868 INFO L354 Elim1Store]: treesize reduction 300, result has 13.0 percent of original size [2021-11-07 08:10:39,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 179 treesize of output 179 [2021-11-07 08:11:07,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:11:07,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:11:07,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-07 08:11:07,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846012145] [2021-11-07 08:11:07,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 08:11:07,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:07,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 08:11:07,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1459, Unknown=27, NotChecked=0, Total=1640 [2021-11-07 08:11:07,134 INFO L87 Difference]: Start difference. First operand 602 states and 719 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:11:09,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:09,113 INFO L93 Difference]: Finished difference Result 766 states and 903 transitions. [2021-11-07 08:11:09,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 08:11:09,114 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-11-07 08:11:09,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:09,117 INFO L225 Difference]: With dead ends: 766 [2021-11-07 08:11:09,117 INFO L226 Difference]: Without dead ends: 766 [2021-11-07 08:11:09,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 58.8s TimeCoverageRelationStatistics Valid=518, Invalid=3877, Unknown=27, NotChecked=0, Total=4422 [2021-11-07 08:11:09,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-11-07 08:11:09,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 545. [2021-11-07 08:11:09,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 521 states have (on average 1.2456813819577734) internal successors, (649), 541 states have internal predecessors, (649), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:11:09,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 652 transitions. [2021-11-07 08:11:09,128 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 652 transitions. Word has length 57 [2021-11-07 08:11:09,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:09,129 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 652 transitions. [2021-11-07 08:11:09,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:11:09,129 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 652 transitions. [2021-11-07 08:11:09,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 08:11:09,130 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:09,130 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:09,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-07 08:11:09,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-07 08:11:09,343 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting mainErr56ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:11:09,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:09,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1267167195, now seen corresponding path program 1 times [2021-11-07 08:11:09,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:09,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495441550] [2021-11-07 08:11:09,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:09,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:09,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:11:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:09,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:09,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:09,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495441550] [2021-11-07 08:11:09,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495441550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:09,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324545830] [2021-11-07 08:11:09,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:09,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:09,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:09,979 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:11:09,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 08:11:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:12,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-07 08:11:12,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:12,560 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:11:12,663 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:11:12,663 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 11 treesize of output 11 [2021-11-07 08:11:12,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:11:12,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 08:11:12,730 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 [2021-11-07 08:11:12,886 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 08:11:12,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-11-07 08:11:12,908 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-07 08:11:12,908 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 59 treesize of output 54 [2021-11-07 08:11:13,242 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-07 08:11:13,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 82 [2021-11-07 08:11:13,263 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-07 08:11:13,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 71 [2021-11-07 08:11:13,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:11:13,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-07 08:11:13,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:11:13,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:11:13,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-07 08:11:13,521 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:11:13,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 57 [2021-11-07 08:11:13,526 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 08:11:13,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 69 [2021-11-07 08:11:15,231 INFO L354 Elim1Store]: treesize reduction 110, result has 6.0 percent of original size [2021-11-07 08:11:15,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 101 treesize of output 77 [2021-11-07 08:11:15,255 INFO L354 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2021-11-07 08:11:15,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 38 [2021-11-07 08:11:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:15,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324545830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:15,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:15,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-11-07 08:11:15,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885317118] [2021-11-07 08:11:15,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 08:11:15,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:15,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 08:11:15,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:11:15,286 INFO L87 Difference]: Start difference. First operand 545 states and 652 transitions. Second operand has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 30 states have internal predecessors, (98), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:11:19,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:19,905 INFO L93 Difference]: Finished difference Result 790 states and 936 transitions. [2021-11-07 08:11:19,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 08:11:19,905 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 30 states have internal predecessors, (98), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-11-07 08:11:19,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:19,908 INFO L225 Difference]: With dead ends: 790 [2021-11-07 08:11:19,908 INFO L226 Difference]: Without dead ends: 790 [2021-11-07 08:11:19,909 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=366, Invalid=2604, Unknown=0, NotChecked=0, Total=2970 [2021-11-07 08:11:19,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-11-07 08:11:19,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 545. [2021-11-07 08:11:19,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 521 states have (on average 1.2456813819577734) internal successors, (649), 541 states have internal predecessors, (649), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:11:19,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 652 transitions. [2021-11-07 08:11:19,916 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 652 transitions. Word has length 58 [2021-11-07 08:11:19,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:19,916 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 652 transitions. [2021-11-07 08:11:19,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 30 states have internal predecessors, (98), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:11:19,916 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 652 transitions. [2021-11-07 08:11:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 08:11:19,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:19,917 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:19,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:20,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:20,118 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting mainErr56ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:11:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:20,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1649636664, now seen corresponding path program 2 times [2021-11-07 08:11:20,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:20,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116013976] [2021-11-07 08:11:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:20,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:21,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:11:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:21,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:21,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116013976] [2021-11-07 08:11:21,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116013976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:21,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269778279] [2021-11-07 08:11:21,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:11:21,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:21,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:21,261 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:11:21,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 08:11:23,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:11:23,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:11:23,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-07 08:11:23,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:23,883 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:11:23,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:11:23,956 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 13 treesize of output 9 [2021-11-07 08:11:24,083 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:11:24,084 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 11 treesize of output 11 [2021-11-07 08:11:24,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:11:24,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-07 08:11:24,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:11:24,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 08:11:24,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:11:24,387 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-07 08:11:24,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 65 [2021-11-07 08:11:24,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:11:24,409 INFO L354 Elim1Store]: treesize reduction 78, result has 17.9 percent of original size [2021-11-07 08:11:24,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 66 [2021-11-07 08:11:24,846 INFO L354 Elim1Store]: treesize reduction 118, result has 21.3 percent of original size [2021-11-07 08:11:24,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 96 [2021-11-07 08:11:24,884 INFO L354 Elim1Store]: treesize reduction 110, result has 22.5 percent of original size [2021-11-07 08:11:24,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 95 [2021-11-07 08:11:26,518 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-07 08:11:26,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 80 [2021-11-07 08:11:26,535 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-07 08:11:26,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 61 [2021-11-07 08:11:26,609 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-11-07 08:11:26,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 83 [2021-11-07 08:11:26,624 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-11-07 08:11:26,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 79 [2021-11-07 08:11:28,249 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-07 08:11:28,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-07 08:11:28,382 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-07 08:11:28,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 101 [2021-11-07 08:11:28,397 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-07 08:11:28,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 91 [2021-11-07 08:11:28,734 INFO L354 Elim1Store]: treesize reduction 144, result has 18.6 percent of original size [2021-11-07 08:11:28,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 105 [2021-11-07 08:11:28,766 INFO L354 Elim1Store]: treesize reduction 130, result has 16.7 percent of original size [2021-11-07 08:11:28,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 106 treesize of output 107 [2021-11-07 08:11:43,654 INFO L354 Elim1Store]: treesize reduction 268, result has 15.2 percent of original size [2021-11-07 08:11:43,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 168 treesize of output 135 [2021-11-07 08:11:43,713 INFO L354 Elim1Store]: treesize reduction 266, result has 16.6 percent of original size [2021-11-07 08:11:43,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 170 treesize of output 184 [2021-11-07 08:11:46,237 INFO L354 Elim1Store]: treesize reduction 302, result has 11.7 percent of original size [2021-11-07 08:11:46,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 160 treesize of output 123 [2021-11-07 08:11:46,290 INFO L354 Elim1Store]: treesize reduction 244, result has 13.2 percent of original size [2021-11-07 08:11:46,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 141 treesize of output 134 [2021-11-07 08:11:46,584 INFO L354 Elim1Store]: treesize reduction 272, result has 12.8 percent of original size [2021-11-07 08:11:46,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 193 treesize of output 126 [2021-11-07 08:11:46,668 INFO L354 Elim1Store]: treesize reduction 300, result has 13.0 percent of original size [2021-11-07 08:11:46,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 181 treesize of output 181 [2021-11-07 08:12:15,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:12:15,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:12:15,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-07 08:12:15,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564104822] [2021-11-07 08:12:15,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 08:12:15,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:15,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 08:12:15,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1280, Unknown=21, NotChecked=0, Total=1560 [2021-11-07 08:12:15,184 INFO L87 Difference]: Start difference. First operand 545 states and 652 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:12:16,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:16,908 INFO L93 Difference]: Finished difference Result 641 states and 751 transitions. [2021-11-07 08:12:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 08:12:16,908 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-11-07 08:12:16,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:16,911 INFO L225 Difference]: With dead ends: 641 [2021-11-07 08:12:16,911 INFO L226 Difference]: Without dead ends: 641 [2021-11-07 08:12:16,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 49.4s TimeCoverageRelationStatistics Valid=492, Invalid=2679, Unknown=21, NotChecked=0, Total=3192 [2021-11-07 08:12:16,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-11-07 08:12:16,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 552. [2021-11-07 08:12:16,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 528 states have (on average 1.2424242424242424) internal successors, (656), 548 states have internal predecessors, (656), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:12:16,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 659 transitions. [2021-11-07 08:12:16,918 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 659 transitions. Word has length 59 [2021-11-07 08:12:16,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:16,919 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 659 transitions. [2021-11-07 08:12:16,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:12:16,919 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 659 transitions. [2021-11-07 08:12:16,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 08:12:16,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:16,920 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:16,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-07 08:12:17,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-11-07 08:12:17,123 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting mainErr71ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:12:17,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:17,123 INFO L85 PathProgramCache]: Analyzing trace with hash 706302212, now seen corresponding path program 1 times [2021-11-07 08:12:17,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:17,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606225771] [2021-11-07 08:12:17,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:17,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:17,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:12:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:12:17,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:17,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606225771] [2021-11-07 08:12:17,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606225771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:17,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749535473] [2021-11-07 08:12:17,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:17,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:17,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:12:17,435 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:12:17,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 08:12:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:20,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 08:12:20,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:12:20,106 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-07 08:12:20,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 24 [2021-11-07 08:12:20,175 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-07 08:12:20,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2021-11-07 08:12:20,356 INFO L354 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-11-07 08:12:20,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2021-11-07 08:12:20,408 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 [2021-11-07 08:12:20,560 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 08:12:20,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-07 08:12:20,802 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-07 08:12:20,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 63 [2021-11-07 08:12:20,815 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-07 08:12:20,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 51 [2021-11-07 08:12:20,941 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-07 08:12:20,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-07 08:12:20,977 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-07 08:12:20,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 38 [2021-11-07 08:12:21,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:12:21,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:12:21,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-07 08:12:21,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722742385] [2021-11-07 08:12:21,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:12:21,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:21,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:12:21,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:12:21,074 INFO L87 Difference]: Start difference. First operand 552 states and 659 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:12:22,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:22,001 INFO L93 Difference]: Finished difference Result 724 states and 860 transitions. [2021-11-07 08:12:22,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 08:12:22,001 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-11-07 08:12:22,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:22,005 INFO L225 Difference]: With dead ends: 724 [2021-11-07 08:12:22,005 INFO L226 Difference]: Without dead ends: 724 [2021-11-07 08:12:22,005 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 08:12:22,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-11-07 08:12:22,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 552. [2021-11-07 08:12:22,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 528 states have (on average 1.2367424242424243) internal successors, (653), 548 states have internal predecessors, (653), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:12:22,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 656 transitions. [2021-11-07 08:12:22,016 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 656 transitions. Word has length 59 [2021-11-07 08:12:22,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:22,017 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 656 transitions. [2021-11-07 08:12:22,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:12:22,017 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 656 transitions. [2021-11-07 08:12:22,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:12:22,018 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:22,019 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2021-11-07 08:12:22,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-07 08:12:22,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:22,235 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:12:22,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:22,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1160361276, now seen corresponding path program 1 times [2021-11-07 08:12:22,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:22,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167589935] [2021-11-07 08:12:22,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:22,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:23,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:12:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:12:23,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:23,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167589935] [2021-11-07 08:12:23,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167589935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:23,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178430690] [2021-11-07 08:12:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:23,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:23,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:12:23,117 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:12:23,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 08:12:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:25,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-07 08:12:25,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:12:25,725 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:12:25,808 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:12:25,824 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 08:12:25,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-07 08:12:25,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-07 08:12:25,907 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 11 treesize of output 7 [2021-11-07 08:12:26,082 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 08:12:26,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 54 [2021-11-07 08:12:26,094 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-07 08:12:26,094 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 68 treesize of output 63 [2021-11-07 08:12:26,458 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-07 08:12:26,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 80 [2021-11-07 08:12:26,483 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-11-07 08:12:26,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 93 [2021-11-07 08:12:26,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:12:26,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:12:26,690 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 08:12:26,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-07 08:12:26,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:12:26,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:12:26,709 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 08:12:26,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 42 [2021-11-07 08:12:26,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-07 08:12:26,840 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-07 08:12:26,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-11-07 08:12:26,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:12:26,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-07 08:12:26,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:12:26,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 43 [2021-11-07 08:12:27,342 INFO L354 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2021-11-07 08:12:27,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 93 [2021-11-07 08:12:27,376 INFO L354 Elim1Store]: treesize reduction 116, result has 14.1 percent of original size [2021-11-07 08:12:27,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 148 treesize of output 140 [2021-11-07 08:12:27,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:12:27,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:12:27,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-07 08:12:27,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334522710] [2021-11-07 08:12:27,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:12:27,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:27,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:12:27,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-11-07 08:12:27,742 INFO L87 Difference]: Start difference. First operand 552 states and 656 transitions. Second operand has 20 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:12:29,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:29,763 INFO L93 Difference]: Finished difference Result 782 states and 932 transitions. [2021-11-07 08:12:29,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 08:12:29,763 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-11-07 08:12:29,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:29,768 INFO L225 Difference]: With dead ends: 782 [2021-11-07 08:12:29,769 INFO L226 Difference]: Without dead ends: 782 [2021-11-07 08:12:29,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=358, Invalid=2504, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 08:12:29,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-11-07 08:12:29,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 552. [2021-11-07 08:12:29,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 528 states have (on average 1.231060606060606) internal successors, (650), 548 states have internal predecessors, (650), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:12:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 653 transitions. [2021-11-07 08:12:29,779 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 653 transitions. Word has length 60 [2021-11-07 08:12:29,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:29,780 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 653 transitions. [2021-11-07 08:12:29,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:12:29,780 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 653 transitions. [2021-11-07 08:12:29,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:12:29,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:29,781 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2021-11-07 08:12:29,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 08:12:29,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:29,982 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting mainErr53REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:12:29,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:29,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1160361277, now seen corresponding path program 1 times [2021-11-07 08:12:29,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:29,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577093427] [2021-11-07 08:12:29,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:29,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:30,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:12:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:30,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:12:30,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:30,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577093427] [2021-11-07 08:12:30,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577093427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:30,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043153082] [2021-11-07 08:12:30,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:30,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:30,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:12:30,775 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:12:30,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 08:12:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:33,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-07 08:12:33,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:12:33,474 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:12:33,567 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 08:12:33,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-07 08:12:33,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:12:33,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-07 08:12:33,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 08:12:33,850 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 08:12:33,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 54 [2021-11-07 08:12:33,862 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-07 08:12:33,862 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 68 treesize of output 63 [2021-11-07 08:12:34,238 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-07 08:12:34,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 80 [2021-11-07 08:12:34,261 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-07 08:12:34,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 73 [2021-11-07 08:12:34,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:12:34,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-07 08:12:34,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:12:34,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-07 08:12:34,599 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-07 08:12:34,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-07 08:12:34,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-07 08:12:34,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:12:34,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-07 08:12:34,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:12:34,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 43 [2021-11-07 08:12:35,126 INFO L354 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2021-11-07 08:12:35,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 106 [2021-11-07 08:12:35,157 INFO L354 Elim1Store]: treesize reduction 206, result has 13.4 percent of original size [2021-11-07 08:12:35,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 164 [2021-11-07 08:12:37,795 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:12:37,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:12:37,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-07 08:12:37,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977421152] [2021-11-07 08:12:37,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 08:12:37,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:37,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 08:12:37,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=925, Unknown=2, NotChecked=0, Total=1056 [2021-11-07 08:12:37,796 INFO L87 Difference]: Start difference. First operand 552 states and 653 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:12:39,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:39,831 INFO L93 Difference]: Finished difference Result 783 states and 922 transitions. [2021-11-07 08:12:39,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 08:12:39,832 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-11-07 08:12:39,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:39,836 INFO L225 Difference]: With dead ends: 783 [2021-11-07 08:12:39,836 INFO L226 Difference]: Without dead ends: 783 [2021-11-07 08:12:39,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=268, Invalid=1986, Unknown=2, NotChecked=0, Total=2256 [2021-11-07 08:12:39,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-11-07 08:12:39,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 552. [2021-11-07 08:12:39,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 528 states have (on average 1.2253787878787878) internal successors, (647), 548 states have internal predecessors, (647), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:12:39,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 650 transitions. [2021-11-07 08:12:39,850 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 650 transitions. Word has length 60 [2021-11-07 08:12:39,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:39,850 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 650 transitions. [2021-11-07 08:12:39,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:12:39,850 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 650 transitions. [2021-11-07 08:12:39,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 08:12:39,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:39,851 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:39,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 08:12:40,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:40,052 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:12:40,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:40,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1154549993, now seen corresponding path program 2 times [2021-11-07 08:12:40,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:40,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538378577] [2021-11-07 08:12:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:40,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:40,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:12:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:12:40,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:40,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538378577] [2021-11-07 08:12:40,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538378577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:40,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314779067] [2021-11-07 08:12:40,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:12:40,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:40,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:12:40,939 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:12:40,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 08:12:44,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:12:44,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:12:44,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-07 08:12:44,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:12:44,035 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:12:44,089 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 08:12:44,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-07 08:12:44,148 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 23 treesize of output 19 [2021-11-07 08:12:44,241 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 08:12:44,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-11-07 08:12:44,460 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-07 08:12:44,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-11-07 08:12:44,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:12:44,576 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-07 08:12:44,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 52 [2021-11-07 08:12:44,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:12:44,871 INFO L354 Elim1Store]: treesize reduction 116, result has 17.1 percent of original size [2021-11-07 08:12:44,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 64 [2021-11-07 08:12:45,335 INFO L354 Elim1Store]: treesize reduction 182, result has 17.6 percent of original size [2021-11-07 08:12:45,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 86 [2021-11-07 08:12:45,659 INFO L354 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2021-11-07 08:12:45,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 59 [2021-11-07 08:12:45,735 INFO L354 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2021-11-07 08:12:45,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 68 [2021-11-07 08:12:45,969 INFO L354 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2021-11-07 08:12:45,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 57 [2021-11-07 08:12:46,173 INFO L354 Elim1Store]: treesize reduction 118, result has 12.6 percent of original size [2021-11-07 08:12:46,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 105 treesize of output 88 [2021-11-07 08:12:46,665 INFO L354 Elim1Store]: treesize reduction 224, result has 15.2 percent of original size [2021-11-07 08:12:46,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 124 treesize of output 97 [2021-11-07 08:12:58,385 INFO L354 Elim1Store]: treesize reduction 358, result has 13.3 percent of original size [2021-11-07 08:12:58,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 188 treesize of output 125 [2021-11-07 08:13:01,242 INFO L354 Elim1Store]: treesize reduction 400, result has 10.5 percent of original size [2021-11-07 08:13:01,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 182 treesize of output 107 [2021-11-07 08:13:03,518 INFO L354 Elim1Store]: treesize reduction 364, result has 11.4 percent of original size [2021-11-07 08:13:03,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 197 treesize of output 116 [2021-11-07 08:13:25,976 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:13:25,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:13:25,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-07 08:13:25,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294210030] [2021-11-07 08:13:25,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 08:13:25,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:25,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 08:13:25,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1789, Unknown=17, NotChecked=0, Total=2162 [2021-11-07 08:13:25,977 INFO L87 Difference]: Start difference. First operand 552 states and 650 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:13:29,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:29,284 INFO L93 Difference]: Finished difference Result 905 states and 1075 transitions. [2021-11-07 08:13:29,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 08:13:29,285 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-11-07 08:13:29,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:29,288 INFO L225 Difference]: With dead ends: 905 [2021-11-07 08:13:29,289 INFO L226 Difference]: Without dead ends: 905 [2021-11-07 08:13:29,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2518 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=1207, Invalid=6258, Unknown=17, NotChecked=0, Total=7482 [2021-11-07 08:13:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-11-07 08:13:29,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 580. [2021-11-07 08:13:29,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 556 states have (on average 1.224820143884892) internal successors, (681), 576 states have internal predecessors, (681), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:13:29,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 684 transitions. [2021-11-07 08:13:29,302 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 684 transitions. Word has length 61 [2021-11-07 08:13:29,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:29,302 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 684 transitions. [2021-11-07 08:13:29,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:13:29,303 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 684 transitions. [2021-11-07 08:13:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 08:13:29,304 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:29,304 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:29,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:29,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:29,517 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting mainErr53REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:13:29,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:29,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1154549992, now seen corresponding path program 2 times [2021-11-07 08:13:29,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:29,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042078192] [2021-11-07 08:13:29,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:29,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:30,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:13:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:30,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:30,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042078192] [2021-11-07 08:13:30,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042078192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:30,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992728199] [2021-11-07 08:13:30,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:13:30,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:30,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:30,674 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:30,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 08:13:34,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:13:34,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:34,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-07 08:13:34,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:34,146 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:13:34,193 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:13:34,203 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:13:34,203 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 11 treesize of output 11 [2021-11-07 08:13:34,253 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 13 treesize of output 9 [2021-11-07 08:13:34,259 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 23 treesize of output 19 [2021-11-07 08:13:34,430 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 08:13:34,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2021-11-07 08:13:34,442 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-07 08:13:34,443 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 67 treesize of output 60 [2021-11-07 08:13:34,745 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-07 08:13:34,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 18 treesize of output 20 [2021-11-07 08:13:34,769 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:13:34,769 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 11 treesize of output 11 [2021-11-07 08:13:35,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:13:35,020 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-07 08:13:35,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 75 [2021-11-07 08:13:35,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:13:35,035 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-07 08:13:35,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 87 [2021-11-07 08:13:35,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:13:35,437 INFO L354 Elim1Store]: treesize reduction 106, result has 24.3 percent of original size [2021-11-07 08:13:35,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 123 treesize of output 106 [2021-11-07 08:13:35,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:13:35,483 INFO L354 Elim1Store]: treesize reduction 150, result has 25.0 percent of original size [2021-11-07 08:13:35,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 135 treesize of output 156 [2021-11-07 08:13:38,207 INFO L354 Elim1Store]: treesize reduction 160, result has 27.6 percent of original size [2021-11-07 08:13:38,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 179 treesize of output 167 [2021-11-07 08:13:38,298 INFO L354 Elim1Store]: treesize reduction 176, result has 31.0 percent of original size [2021-11-07 08:13:38,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 203 treesize of output 242 [2021-11-07 08:13:41,781 INFO L354 Elim1Store]: treesize reduction 98, result has 20.3 percent of original size [2021-11-07 08:13:41,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 114 [2021-11-07 08:13:41,819 INFO L354 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2021-11-07 08:13:41,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 123 treesize of output 132 [2021-11-07 08:13:42,073 INFO L354 Elim1Store]: treesize reduction 86, result has 22.5 percent of original size [2021-11-07 08:13:42,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 117 [2021-11-07 08:13:42,111 INFO L354 Elim1Store]: treesize reduction 116, result has 24.2 percent of original size [2021-11-07 08:13:42,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 150 [2021-11-07 08:13:44,587 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-07 08:13:44,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-11-07 08:13:44,633 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-07 08:13:44,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-07 08:13:44,876 INFO L354 Elim1Store]: treesize reduction 110, result has 18.5 percent of original size [2021-11-07 08:13:44,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 173 treesize of output 158 [2021-11-07 08:13:44,919 INFO L354 Elim1Store]: treesize reduction 146, result has 20.2 percent of original size [2021-11-07 08:13:44,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 184 treesize of output 202 [2021-11-07 08:13:45,868 INFO L354 Elim1Store]: treesize reduction 214, result has 18.9 percent of original size [2021-11-07 08:13:45,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 217 treesize of output 178 [2021-11-07 08:13:45,936 INFO L354 Elim1Store]: treesize reduction 222, result has 21.0 percent of original size [2021-11-07 08:13:45,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 232 treesize of output 256 [2021-11-07 08:14:12,144 INFO L354 Elim1Store]: treesize reduction 336, result has 18.6 percent of original size [2021-11-07 08:14:12,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 346 treesize of output 243 [2021-11-07 08:14:12,249 INFO L354 Elim1Store]: treesize reduction 286, result has 23.9 percent of original size [2021-11-07 08:14:12,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 372 treesize of output 384 [2021-11-07 08:15:49,880 INFO L354 Elim1Store]: treesize reduction 356, result has 16.4 percent of original size [2021-11-07 08:15:49,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 22 case distinctions, treesize of input 325 treesize of output 265 [2021-11-07 08:15:49,997 INFO L354 Elim1Store]: treesize reduction 300, result has 21.7 percent of original size [2021-11-07 08:15:49,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 353 treesize of output 394 [2021-11-07 08:15:55,261 INFO L354 Elim1Store]: treesize reduction 354, result has 13.9 percent of original size [2021-11-07 08:15:55,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 254 treesize of output 178 [2021-11-07 08:15:55,349 INFO L354 Elim1Store]: treesize reduction 266, result has 15.8 percent of original size [2021-11-07 08:15:55,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 178 treesize of output 199 [2021-11-07 08:16:00,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:16:00,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:16:00,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-07 08:16:00,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596505263] [2021-11-07 08:16:00,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 08:16:00,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:00,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 08:16:00,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=2138, Unknown=26, NotChecked=0, Total=2450 [2021-11-07 08:16:00,328 INFO L87 Difference]: Start difference. First operand 580 states and 684 transitions. Second operand has 28 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:16:03,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:03,525 INFO L93 Difference]: Finished difference Result 800 states and 953 transitions. [2021-11-07 08:16:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 08:16:03,525 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-11-07 08:16:03,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:03,528 INFO L225 Difference]: With dead ends: 800 [2021-11-07 08:16:03,529 INFO L226 Difference]: Without dead ends: 800 [2021-11-07 08:16:03,529 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=546, Invalid=3984, Unknown=26, NotChecked=0, Total=4556 [2021-11-07 08:16:03,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-11-07 08:16:03,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 580. [2021-11-07 08:16:03,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 556 states have (on average 1.223021582733813) internal successors, (680), 576 states have internal predecessors, (680), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:16:03,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 683 transitions. [2021-11-07 08:16:03,542 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 683 transitions. Word has length 61 [2021-11-07 08:16:03,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:03,543 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 683 transitions. [2021-11-07 08:16:03,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:16:03,543 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 683 transitions. [2021-11-07 08:16:03,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 08:16:03,544 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:03,544 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:03,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-07 08:16:03,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:16:03,759 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:16:03,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:03,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1224059407, now seen corresponding path program 1 times [2021-11-07 08:16:03,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:03,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789934371] [2021-11-07 08:16:03,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:03,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:05,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:16:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:16:05,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:05,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789934371] [2021-11-07 08:16:05,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789934371] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:05,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074140529] [2021-11-07 08:16:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:05,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:16:05,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:16:05,060 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:16:05,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 08:16:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:08,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-07 08:16:08,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:16:08,767 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:16:08,822 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 13 treesize of output 9 [2021-11-07 08:16:08,827 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 13 treesize of output 9 [2021-11-07 08:16:08,966 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:16:08,966 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 11 treesize of output 11 [2021-11-07 08:16:09,040 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-07 08:16:09,041 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 21 treesize of output 26 [2021-11-07 08:16:09,068 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-07 08:16:09,068 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 25 treesize of output 30 [2021-11-07 08:16:09,311 INFO L354 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2021-11-07 08:16:09,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 70 [2021-11-07 08:16:09,325 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-07 08:16:09,326 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 73 treesize of output 68 [2021-11-07 08:16:09,928 INFO L354 Elim1Store]: treesize reduction 118, result has 21.3 percent of original size [2021-11-07 08:16:09,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 96 [2021-11-07 08:16:09,959 INFO L354 Elim1Store]: treesize reduction 86, result has 25.2 percent of original size [2021-11-07 08:16:09,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 104 [2021-11-07 08:16:10,385 INFO L354 Elim1Store]: treesize reduction 136, result has 15.0 percent of original size [2021-11-07 08:16:10,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 84 [2021-11-07 08:16:10,424 INFO L354 Elim1Store]: treesize reduction 80, result has 17.5 percent of original size [2021-11-07 08:16:10,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 62 [2021-11-07 08:16:10,583 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 08:16:10,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-07 08:16:10,801 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-07 08:16:10,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 97 [2021-11-07 08:16:10,837 INFO L354 Elim1Store]: treesize reduction 118, result has 16.9 percent of original size [2021-11-07 08:16:10,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 83 [2021-11-07 08:16:11,405 INFO L354 Elim1Store]: treesize reduction 118, result has 26.7 percent of original size [2021-11-07 08:16:11,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 119 treesize of output 110 [2021-11-07 08:16:11,431 INFO L354 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2021-11-07 08:16:11,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 100 [2021-11-07 08:16:12,186 INFO L354 Elim1Store]: treesize reduction 8, result has 86.4 percent of original size [2021-11-07 08:16:12,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 120 [2021-11-07 08:16:12,644 INFO L354 Elim1Store]: treesize reduction 98, result has 27.4 percent of original size [2021-11-07 08:16:12,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 149 treesize of output 152 [2021-11-07 08:16:12,708 INFO L354 Elim1Store]: treesize reduction 76, result has 32.7 percent of original size [2021-11-07 08:16:12,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 173 [2021-11-07 08:16:13,483 INFO L354 Elim1Store]: treesize reduction 214, result has 18.9 percent of original size [2021-11-07 08:16:13,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 176 treesize of output 149 [2021-11-07 08:16:13,533 INFO L354 Elim1Store]: treesize reduction 114, result has 24.0 percent of original size [2021-11-07 08:16:13,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 149 treesize of output 164 [2021-11-07 08:16:18,210 INFO L354 Elim1Store]: treesize reduction 336, result has 18.6 percent of original size [2021-11-07 08:16:18,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 263 treesize of output 196 [2021-11-07 08:16:18,296 INFO L354 Elim1Store]: treesize reduction 176, result has 26.4 percent of original size [2021-11-07 08:16:18,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 196 treesize of output 232 [2021-11-07 08:16:25,150 INFO L354 Elim1Store]: treesize reduction 290, result has 12.4 percent of original size [2021-11-07 08:16:25,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 17 case distinctions, treesize of input 227 treesize of output 168 [2021-11-07 08:16:25,206 INFO L354 Elim1Store]: treesize reduction 160, result has 17.5 percent of original size [2021-11-07 08:16:25,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 168 treesize of output 171 [2021-11-07 08:16:26,452 INFO L354 Elim1Store]: treesize reduction 354, result has 13.9 percent of original size [2021-11-07 08:16:26,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 288 treesize of output 175 [2021-11-07 08:16:26,527 INFO L354 Elim1Store]: treesize reduction 190, result has 18.5 percent of original size [2021-11-07 08:16:26,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 175 treesize of output 193 [2021-11-07 08:16:44,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-07 08:16:44,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:16:44,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-07 08:16:44,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073707653] [2021-11-07 08:16:44,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 08:16:44,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:44,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 08:16:44,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2142, Unknown=5, NotChecked=0, Total=2352 [2021-11-07 08:16:44,801 INFO L87 Difference]: Start difference. First operand 580 states and 683 transitions. Second operand has 28 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:16:47,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:47,872 INFO L93 Difference]: Finished difference Result 917 states and 1093 transitions. [2021-11-07 08:16:47,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 08:16:47,873 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-11-07 08:16:47,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:47,875 INFO L225 Difference]: With dead ends: 917 [2021-11-07 08:16:47,875 INFO L226 Difference]: Without dead ends: 917 [2021-11-07 08:16:47,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1733 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=747, Invalid=5890, Unknown=5, NotChecked=0, Total=6642 [2021-11-07 08:16:47,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-11-07 08:16:47,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 615. [2021-11-07 08:16:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 591 states have (on average 1.2199661590524535) internal successors, (721), 611 states have internal predecessors, (721), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:16:47,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 724 transitions. [2021-11-07 08:16:47,890 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 724 transitions. Word has length 61 [2021-11-07 08:16:47,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:47,891 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 724 transitions. [2021-11-07 08:16:47,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:16:47,891 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 724 transitions. [2021-11-07 08:16:47,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 08:16:47,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:47,892 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:47,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-07 08:16:48,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-07 08:16:48,093 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting mainErr53REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-07 08:16:48,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:48,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1224059408, now seen corresponding path program 1 times [2021-11-07 08:16:48,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:48,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967576874] [2021-11-07 08:16:48,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:48,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:49,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:16:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:16:49,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:49,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967576874] [2021-11-07 08:16:49,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967576874] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:49,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489004650] [2021-11-07 08:16:49,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:49,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:16:49,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:16:49,338 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:16:49,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1dbea83-bc38-4ea7-af85-2bedc1c95241/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-07 08:16:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:53,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-07 08:16:53,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:16:53,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:16:53,379 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 13 treesize of output 9 [2021-11-07 08:16:53,390 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 13 treesize of output 9 [2021-11-07 08:16:53,552 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:16:53,552 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 11 treesize of output 11 [2021-11-07 08:16:53,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:16:53,649 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 25 treesize of output 24 [2021-11-07 08:16:53,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:16:53,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 08:16:53,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:16:53,933 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-07 08:16:53,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 58 [2021-11-07 08:16:53,946 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-07 08:16:53,946 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 61 treesize of output 56 [2021-11-07 08:16:54,386 INFO L354 Elim1Store]: treesize reduction 118, result has 21.3 percent of original size [2021-11-07 08:16:54,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 87 [2021-11-07 08:16:54,412 INFO L354 Elim1Store]: treesize reduction 62, result has 28.7 percent of original size [2021-11-07 08:16:54,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 80 [2021-11-07 08:16:54,657 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-07 08:16:54,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-07 08:16:54,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:16:54,669 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-07 08:16:54,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 36 [2021-11-07 08:16:54,732 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 08:16:54,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-07 08:16:54,876 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-07 08:16:54,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-07 08:16:54,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:16:54,894 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-07 08:16:54,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 54 [2021-11-07 08:16:55,314 INFO L354 Elim1Store]: treesize reduction 118, result has 26.7 percent of original size [2021-11-07 08:16:55,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 101 [2021-11-07 08:16:55,339 INFO L354 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2021-11-07 08:16:55,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 91 [2021-11-07 08:16:55,827 INFO L354 Elim1Store]: treesize reduction 8, result has 86.4 percent of original size [2021-11-07 08:16:55,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 120 [2021-11-07 08:16:56,223 INFO L354 Elim1Store]: treesize reduction 98, result has 27.4 percent of original size [2021-11-07 08:16:56,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 140 treesize of output 143 [2021-11-07 08:16:56,271 INFO L354 Elim1Store]: treesize reduction 76, result has 32.7 percent of original size [2021-11-07 08:16:56,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 143 treesize of output 164 [2021-11-07 08:16:57,072 INFO L354 Elim1Store]: treesize reduction 214, result has 18.9 percent of original size [2021-11-07 08:16:57,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 186 treesize of output 153 [2021-11-07 08:16:57,120 INFO L354 Elim1Store]: treesize reduction 114, result has 24.0 percent of original size [2021-11-07 08:16:57,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 153 treesize of output 168