./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:48:12,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:48:12,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:48:12,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:48:12,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:48:12,802 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:48:12,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:48:12,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:48:12,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:48:12,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:48:12,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:48:12,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:48:12,815 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:48:12,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:48:12,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:48:12,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:48:12,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:48:12,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:48:12,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:48:12,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:48:12,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:48:12,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:48:12,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:48:12,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:48:12,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:48:12,858 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:48:12,858 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:48:12,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:48:12,862 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:48:12,863 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:48:12,865 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:48:12,866 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:48:12,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:48:12,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:48:12,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:48:12,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:48:12,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:48:12,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:48:12,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:48:12,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:48:12,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:48:12,880 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-23 12:48:12,937 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:48:12,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:48:12,938 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:48:12,938 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:48:12,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:48:12,940 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:48:12,940 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:48:12,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:48:12,941 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:48:12,941 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 12:48:12,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:48:12,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:48:12,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:48:12,943 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 12:48:12,944 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 12:48:12,944 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 12:48:12,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:48:12,944 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 12:48:12,944 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:48:12,945 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:48:12,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:48:12,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:48:12,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:48:12,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:48:12,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:48:12,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:48:12,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:48:12,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:48:12,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:48:12,949 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_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e [2021-11-23 12:48:13,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:48:13,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:48:13,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:48:13,308 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:48:13,309 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:48:13,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2021-11-23 12:48:13,393 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/data/6520817ec/184ae4f962254bb4ad05df82b0cfaca7/FLAG6138804a3 [2021-11-23 12:48:14,036 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:48:14,038 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2021-11-23 12:48:14,064 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/data/6520817ec/184ae4f962254bb4ad05df82b0cfaca7/FLAG6138804a3 [2021-11-23 12:48:14,328 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/data/6520817ec/184ae4f962254bb4ad05df82b0cfaca7 [2021-11-23 12:48:14,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:48:14,333 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:48:14,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:48:14,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:48:14,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:48:14,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:48:14" (1/1) ... [2021-11-23 12:48:14,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7008ca97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:48:14, skipping insertion in model container [2021-11-23 12:48:14,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:48:14" (1/1) ... [2021-11-23 12:48:14,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:48:14,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:48:14,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:48:14,865 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:48:14,909 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:48:14,942 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:48:14,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:48:14 WrapperNode [2021-11-23 12:48:14,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:48:14,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:48:14,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:48:14,945 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:48:14,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:48:14" (1/1) ... [2021-11-23 12:48:14,971 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:48:14" (1/1) ... [2021-11-23 12:48:15,001 INFO L137 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2021-11-23 12:48:15,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:48:15,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:48:15,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:48:15,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:48:15,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:48:14" (1/1) ... [2021-11-23 12:48:15,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:48:14" (1/1) ... [2021-11-23 12:48:15,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:48:14" (1/1) ... [2021-11-23 12:48:15,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:48:14" (1/1) ... [2021-11-23 12:48:15,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:48:14" (1/1) ... [2021-11-23 12:48:15,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:48:14" (1/1) ... [2021-11-23 12:48:15,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:48:14" (1/1) ... [2021-11-23 12:48:15,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:48:15,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:48:15,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:48:15,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:48:15,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:48:14" (1/1) ... [2021-11-23 12:48:15,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:48:15,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:48:15,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:48:15,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:48:15,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 12:48:15,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 12:48:15,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 12:48:15,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 12:48:15,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:48:15,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:48:15,362 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:48:15,364 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:48:15,643 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:48:15,650 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:48:15,650 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 12:48:15,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:48:15 BoogieIcfgContainer [2021-11-23 12:48:15,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:48:15,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:48:15,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:48:15,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:48:15,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:48:14" (1/3) ... [2021-11-23 12:48:15,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a6a29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:48:15, skipping insertion in model container [2021-11-23 12:48:15,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:48:14" (2/3) ... [2021-11-23 12:48:15,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a6a29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:48:15, skipping insertion in model container [2021-11-23 12:48:15,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:48:15" (3/3) ... [2021-11-23 12:48:15,677 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrspn-alloca-2.i [2021-11-23 12:48:15,683 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:48:15,691 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-11-23 12:48:15,761 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:48:15,769 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 12:48:15,769 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-11-23 12:48:15,788 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:15,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 12:48:15,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:15,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:15,798 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:15,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:15,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-11-23 12:48:15,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:15,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178572452] [2021-11-23 12:48:15,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:15,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:16,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:16,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178572452] [2021-11-23 12:48:16,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178572452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:48:16,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:48:16,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:48:16,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315549876] [2021-11-23 12:48:16,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:48:16,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:48:16,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:16,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:48:16,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:48:16,125 INFO L87 Difference]: Start difference. First operand has 43 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:16,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:16,207 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2021-11-23 12:48:16,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:48:16,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 12:48:16,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:16,217 INFO L225 Difference]: With dead ends: 78 [2021-11-23 12:48:16,217 INFO L226 Difference]: Without dead ends: 74 [2021-11-23 12:48:16,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:48:16,224 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 37 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:16,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 121 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:48:16,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-23 12:48:16,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 44. [2021-11-23 12:48:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:16,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-11-23 12:48:16,271 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 7 [2021-11-23 12:48:16,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:16,271 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-11-23 12:48:16,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:16,272 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-11-23 12:48:16,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 12:48:16,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:16,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:16,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:48:16,274 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:16,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:16,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-11-23 12:48:16,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:16,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969365346] [2021-11-23 12:48:16,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:16,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:16,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:16,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969365346] [2021-11-23 12:48:16,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969365346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:48:16,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:48:16,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:48:16,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356125555] [2021-11-23 12:48:16,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:48:16,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:48:16,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:16,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:48:16,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:48:16,351 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:16,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:16,387 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-11-23 12:48:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:48:16,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 12:48:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:16,388 INFO L225 Difference]: With dead ends: 42 [2021-11-23 12:48:16,389 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 12:48:16,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:48:16,391 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:16,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 34 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:48:16,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 12:48:16,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-23 12:48:16,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:16,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-11-23 12:48:16,400 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2021-11-23 12:48:16,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:16,400 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-11-23 12:48:16,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:16,401 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-11-23 12:48:16,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 12:48:16,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:16,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:16,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:48:16,402 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:16,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:16,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-11-23 12:48:16,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:16,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19988644] [2021-11-23 12:48:16,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:16,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:16,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:16,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19988644] [2021-11-23 12:48:16,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19988644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:48:16,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:48:16,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:48:16,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712740971] [2021-11-23 12:48:16,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:48:16,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:48:16,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:16,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:48:16,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:48:16,549 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:16,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:16,658 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2021-11-23 12:48:16,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:48:16,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 12:48:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:16,661 INFO L225 Difference]: With dead ends: 75 [2021-11-23 12:48:16,661 INFO L226 Difference]: Without dead ends: 75 [2021-11-23 12:48:16,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:48:16,664 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:16,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:48:16,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-23 12:48:16,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 44. [2021-11-23 12:48:16,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:16,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-11-23 12:48:16,673 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 7 [2021-11-23 12:48:16,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:16,674 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-11-23 12:48:16,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:16,674 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-11-23 12:48:16,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 12:48:16,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:16,675 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:16,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 12:48:16,679 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:16,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:16,680 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-11-23 12:48:16,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:16,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237908717] [2021-11-23 12:48:16,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:16,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:16,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:16,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237908717] [2021-11-23 12:48:16,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237908717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:48:16,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:48:16,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:48:16,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980413498] [2021-11-23 12:48:16,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:48:16,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:48:16,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:16,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:48:16,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:48:16,839 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:16,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:16,890 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-11-23 12:48:16,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:48:16,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 12:48:16,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:16,895 INFO L225 Difference]: With dead ends: 43 [2021-11-23 12:48:16,896 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 12:48:16,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:48:16,901 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:16,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 32 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:48:16,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 12:48:16,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-23 12:48:16,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:16,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-11-23 12:48:16,918 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 9 [2021-11-23 12:48:16,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:16,918 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-11-23 12:48:16,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:16,919 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-11-23 12:48:16,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 12:48:16,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:16,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:16,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 12:48:16,920 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:16,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:16,921 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-11-23 12:48:16,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:16,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126139348] [2021-11-23 12:48:16,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:16,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:17,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:17,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126139348] [2021-11-23 12:48:17,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126139348] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:48:17,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:48:17,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:48:17,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800034250] [2021-11-23 12:48:17,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:48:17,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:48:17,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:17,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:48:17,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:48:17,028 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:17,073 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-11-23 12:48:17,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:48:17,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 12:48:17,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:17,076 INFO L225 Difference]: With dead ends: 76 [2021-11-23 12:48:17,076 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 12:48:17,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:48:17,078 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 29 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:17,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:48:17,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 12:48:17,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-11-23 12:48:17,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:17,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-11-23 12:48:17,087 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 9 [2021-11-23 12:48:17,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:17,088 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-11-23 12:48:17,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:17,088 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-11-23 12:48:17,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 12:48:17,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:17,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:17,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 12:48:17,090 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:17,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:17,091 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-11-23 12:48:17,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:17,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941219016] [2021-11-23 12:48:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:17,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:17,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:17,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941219016] [2021-11-23 12:48:17,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941219016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:48:17,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:48:17,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:48:17,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596295233] [2021-11-23 12:48:17,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:48:17,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:48:17,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:17,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:48:17,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:48:17,129 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:17,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:17,161 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-11-23 12:48:17,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:48:17,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 12:48:17,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:17,163 INFO L225 Difference]: With dead ends: 52 [2021-11-23 12:48:17,163 INFO L226 Difference]: Without dead ends: 52 [2021-11-23 12:48:17,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:48:17,165 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:17,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 33 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:48:17,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-23 12:48:17,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-23 12:48:17,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:17,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-11-23 12:48:17,174 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 9 [2021-11-23 12:48:17,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:17,175 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-11-23 12:48:17,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:17,175 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-11-23 12:48:17,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 12:48:17,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:17,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:17,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 12:48:17,177 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:17,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:17,178 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-11-23 12:48:17,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:17,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166945180] [2021-11-23 12:48:17,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:17,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:17,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:17,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166945180] [2021-11-23 12:48:17,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166945180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:48:17,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:48:17,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:48:17,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736144947] [2021-11-23 12:48:17,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:48:17,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:48:17,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:17,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:48:17,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:48:17,300 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:17,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:17,461 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2021-11-23 12:48:17,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:48:17,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 12:48:17,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:17,463 INFO L225 Difference]: With dead ends: 76 [2021-11-23 12:48:17,464 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 12:48:17,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:48:17,466 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 60 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:17,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 73 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:48:17,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 12:48:17,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-11-23 12:48:17,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-11-23 12:48:17,476 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 9 [2021-11-23 12:48:17,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:17,476 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-11-23 12:48:17,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:17,477 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-11-23 12:48:17,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 12:48:17,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:17,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:17,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 12:48:17,491 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:17,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:17,492 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-11-23 12:48:17,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:17,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498708303] [2021-11-23 12:48:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:17,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:17,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:17,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498708303] [2021-11-23 12:48:17,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498708303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:48:17,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:48:17,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:48:17,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631190141] [2021-11-23 12:48:17,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:48:17,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:48:17,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:17,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:48:17,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:48:17,590 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:17,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:17,622 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2021-11-23 12:48:17,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:48:17,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 12:48:17,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:17,624 INFO L225 Difference]: With dead ends: 53 [2021-11-23 12:48:17,624 INFO L226 Difference]: Without dead ends: 53 [2021-11-23 12:48:17,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:48:17,626 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 63 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:17,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 29 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:48:17,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-23 12:48:17,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-23 12:48:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.391304347826087) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2021-11-23 12:48:17,635 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 10 [2021-11-23 12:48:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:17,635 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2021-11-23 12:48:17,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:17,636 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2021-11-23 12:48:17,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:48:17,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:17,637 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:17,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 12:48:17,650 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:17,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:17,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-11-23 12:48:17,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:17,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250499536] [2021-11-23 12:48:17,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:17,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:17,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:17,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250499536] [2021-11-23 12:48:17,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250499536] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:48:17,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118111226] [2021-11-23 12:48:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:17,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:48:17,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:48:17,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:48:17,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:48:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:17,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 12:48:17,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:48:18,089 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 12:48:18,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 12:48:18,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:48:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:18,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:48:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:18,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118111226] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:48:18,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:48:18,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-23 12:48:18,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740649278] [2021-11-23 12:48:18,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:48:18,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 12:48:18,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:18,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 12:48:18,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:48:18,532 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:18,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:18,802 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2021-11-23 12:48:18,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:48:18,803 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 12:48:18,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:18,804 INFO L225 Difference]: With dead ends: 116 [2021-11-23 12:48:18,805 INFO L226 Difference]: Without dead ends: 116 [2021-11-23 12:48:18,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:48:18,806 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 174 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:18,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 183 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:48:18,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-23 12:48:18,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 48. [2021-11-23 12:48:18,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:18,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-11-23 12:48:18,817 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 11 [2021-11-23 12:48:18,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:18,817 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-11-23 12:48:18,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:18,818 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-11-23 12:48:18,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 12:48:18,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:18,819 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:18,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:48:19,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 12:48:19,034 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:19,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:19,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446205, now seen corresponding path program 1 times [2021-11-23 12:48:19,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:19,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714765048] [2021-11-23 12:48:19,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:19,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:19,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:19,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714765048] [2021-11-23 12:48:19,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714765048] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:48:19,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:48:19,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:48:19,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918411449] [2021-11-23 12:48:19,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:48:19,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:48:19,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:19,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:48:19,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:48:19,128 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:19,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:19,194 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-11-23 12:48:19,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:48:19,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 12:48:19,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:19,199 INFO L225 Difference]: With dead ends: 47 [2021-11-23 12:48:19,199 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 12:48:19,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:48:19,202 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:19,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 67 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:48:19,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 12:48:19,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-23 12:48:19,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:19,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-11-23 12:48:19,226 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 13 [2021-11-23 12:48:19,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:19,227 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-11-23 12:48:19,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:19,227 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-11-23 12:48:19,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 12:48:19,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:19,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:19,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 12:48:19,231 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:19,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:19,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446204, now seen corresponding path program 1 times [2021-11-23 12:48:19,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:19,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540803843] [2021-11-23 12:48:19,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:19,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:19,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:19,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540803843] [2021-11-23 12:48:19,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540803843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:48:19,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:48:19,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 12:48:19,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784315247] [2021-11-23 12:48:19,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:48:19,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:48:19,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:19,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:48:19,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:48:19,384 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:19,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:19,497 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-11-23 12:48:19,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:48:19,498 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 12:48:19,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:19,500 INFO L225 Difference]: With dead ends: 50 [2021-11-23 12:48:19,501 INFO L226 Difference]: Without dead ends: 50 [2021-11-23 12:48:19,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:48:19,513 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:19,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 79 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:48:19,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-23 12:48:19,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-11-23 12:48:19,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:19,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-11-23 12:48:19,530 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 13 [2021-11-23 12:48:19,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:19,531 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-11-23 12:48:19,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:19,533 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-11-23 12:48:19,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 12:48:19,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:19,535 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:19,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 12:48:19,536 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:19,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:19,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-11-23 12:48:19,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:19,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90317736] [2021-11-23 12:48:19,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:19,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:19,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:19,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90317736] [2021-11-23 12:48:19,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90317736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:48:19,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846568155] [2021-11-23 12:48:19,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:19,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:48:19,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:48:19,668 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:48:19,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:48:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:19,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 12:48:19,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:48:19,768 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:48:19,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:48:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:19,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:48:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:20,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846568155] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:48:20,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:48:20,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-23 12:48:20,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551881767] [2021-11-23 12:48:20,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:48:20,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 12:48:20,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:20,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 12:48:20,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-23 12:48:20,121 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:20,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:20,327 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2021-11-23 12:48:20,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 12:48:20,328 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 12:48:20,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:20,329 INFO L225 Difference]: With dead ends: 91 [2021-11-23 12:48:20,329 INFO L226 Difference]: Without dead ends: 91 [2021-11-23 12:48:20,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-23 12:48:20,332 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 166 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:20,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 170 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:48:20,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-23 12:48:20,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 46. [2021-11-23 12:48:20,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-11-23 12:48:20,347 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2021-11-23 12:48:20,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:20,348 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-11-23 12:48:20,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:20,349 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-11-23 12:48:20,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 12:48:20,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:20,351 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:20,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:48:20,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:48:20,566 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:20,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:20,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298785, now seen corresponding path program 1 times [2021-11-23 12:48:20,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:20,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385760158] [2021-11-23 12:48:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:20,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:20,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:20,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385760158] [2021-11-23 12:48:20,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385760158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:48:20,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:48:20,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:48:20,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886064436] [2021-11-23 12:48:20,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:48:20,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:48:20,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:20,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:48:20,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:48:20,631 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:20,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:20,707 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-11-23 12:48:20,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:48:20,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 12:48:20,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:20,709 INFO L225 Difference]: With dead ends: 46 [2021-11-23 12:48:20,709 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 12:48:20,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:48:20,712 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:20,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 76 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:48:20,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 12:48:20,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-11-23 12:48:20,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:20,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-11-23 12:48:20,725 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 16 [2021-11-23 12:48:20,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:20,727 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-11-23 12:48:20,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:20,728 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-11-23 12:48:20,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 12:48:20,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:20,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:20,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 12:48:20,734 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:20,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:20,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298784, now seen corresponding path program 1 times [2021-11-23 12:48:20,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:20,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008054814] [2021-11-23 12:48:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:20,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:20,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:20,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008054814] [2021-11-23 12:48:20,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008054814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:48:20,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:48:20,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 12:48:20,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123853078] [2021-11-23 12:48:20,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:48:20,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:48:20,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:20,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:48:20,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:48:20,895 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:20,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:20,999 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-11-23 12:48:21,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:48:21,000 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 12:48:21,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:21,001 INFO L225 Difference]: With dead ends: 49 [2021-11-23 12:48:21,001 INFO L226 Difference]: Without dead ends: 49 [2021-11-23 12:48:21,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-23 12:48:21,002 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 86 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:21,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 85 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:48:21,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-23 12:48:21,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-11-23 12:48:21,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:21,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-11-23 12:48:21,012 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 16 [2021-11-23 12:48:21,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:21,013 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-11-23 12:48:21,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:21,013 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-11-23 12:48:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 12:48:21,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:21,019 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:21,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 12:48:21,020 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:21,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:21,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1033258167, now seen corresponding path program 1 times [2021-11-23 12:48:21,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:21,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490729281] [2021-11-23 12:48:21,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:21,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:21,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:21,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490729281] [2021-11-23 12:48:21,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490729281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:48:21,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:48:21,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:48:21,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294738592] [2021-11-23 12:48:21,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:48:21,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:48:21,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:21,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:48:21,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:48:21,167 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:21,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:21,188 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-11-23 12:48:21,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:48:21,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 12:48:21,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:21,190 INFO L225 Difference]: With dead ends: 46 [2021-11-23 12:48:21,190 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 12:48:21,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:48:21,195 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:21,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 52 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:48:21,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 12:48:21,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-23 12:48:21,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:21,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-11-23 12:48:21,199 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 21 [2021-11-23 12:48:21,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:21,200 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-11-23 12:48:21,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:21,200 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-11-23 12:48:21,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 12:48:21,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:21,202 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:21,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 12:48:21,202 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:21,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:21,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1033312273, now seen corresponding path program 1 times [2021-11-23 12:48:21,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:21,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009284197] [2021-11-23 12:48:21,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:21,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:21,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:21,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009284197] [2021-11-23 12:48:21,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009284197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:48:21,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:48:21,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 12:48:21,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673186127] [2021-11-23 12:48:21,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:48:21,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 12:48:21,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:21,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 12:48:21,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:48:21,369 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:21,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:21,549 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-11-23 12:48:21,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 12:48:21,550 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 12:48:21,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:21,551 INFO L225 Difference]: With dead ends: 53 [2021-11-23 12:48:21,551 INFO L226 Difference]: Without dead ends: 34 [2021-11-23 12:48:21,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-11-23 12:48:21,552 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:21,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 173 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:48:21,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-23 12:48:21,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-23 12:48:21,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-11-23 12:48:21,555 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 21 [2021-11-23 12:48:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:21,555 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-11-23 12:48:21,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:21,555 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-11-23 12:48:21,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 12:48:21,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:21,556 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:21,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 12:48:21,557 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:21,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:21,557 INFO L85 PathProgramCache]: Analyzing trace with hash -960832433, now seen corresponding path program 1 times [2021-11-23 12:48:21,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:21,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292872286] [2021-11-23 12:48:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:21,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:21,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:21,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292872286] [2021-11-23 12:48:21,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292872286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:48:21,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:48:21,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-23 12:48:21,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096750627] [2021-11-23 12:48:21,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:48:21,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 12:48:21,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:21,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 12:48:21,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:48:21,801 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:21,992 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-11-23 12:48:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 12:48:21,993 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 12:48:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:21,994 INFO L225 Difference]: With dead ends: 48 [2021-11-23 12:48:21,994 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 12:48:21,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-11-23 12:48:21,996 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 93 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:21,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 147 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:48:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 12:48:22,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-11-23 12:48:22,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:22,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-11-23 12:48:22,002 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 21 [2021-11-23 12:48:22,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:22,005 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-11-23 12:48:22,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:22,008 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-11-23 12:48:22,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 12:48:22,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:22,010 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:22,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 12:48:22,010 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:22,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:22,011 INFO L85 PathProgramCache]: Analyzing trace with hash -276078, now seen corresponding path program 1 times [2021-11-23 12:48:22,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:22,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886962480] [2021-11-23 12:48:22,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:22,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:22,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:22,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886962480] [2021-11-23 12:48:22,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886962480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:48:22,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869992293] [2021-11-23 12:48:22,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:22,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:48:22,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:48:22,245 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:48:22,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 12:48:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:22,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 12:48:22,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:48:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:22,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:48:22,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 12:48:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:22,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869992293] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:48:22,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:48:22,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2021-11-23 12:48:22,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911491182] [2021-11-23 12:48:22,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:48:22,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 12:48:22,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:22,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 12:48:22,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-11-23 12:48:22,812 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:23,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:23,223 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-11-23 12:48:23,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 12:48:23,225 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-23 12:48:23,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:23,226 INFO L225 Difference]: With dead ends: 49 [2021-11-23 12:48:23,226 INFO L226 Difference]: Without dead ends: 49 [2021-11-23 12:48:23,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-11-23 12:48:23,227 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 219 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:23,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 193 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:48:23,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-23 12:48:23,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-11-23 12:48:23,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:23,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-23 12:48:23,231 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 25 [2021-11-23 12:48:23,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:23,232 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-23 12:48:23,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:23,232 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-23 12:48:23,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 12:48:23,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:23,234 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:23,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:48:23,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 12:48:23,446 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:23,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:23,447 INFO L85 PathProgramCache]: Analyzing trace with hash -278256, now seen corresponding path program 1 times [2021-11-23 12:48:23,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:23,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85241465] [2021-11-23 12:48:23,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:23,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:48:23,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:23,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85241465] [2021-11-23 12:48:23,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85241465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:48:23,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:48:23,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 12:48:23,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90200261] [2021-11-23 12:48:23,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:48:23,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 12:48:23,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:23,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 12:48:23,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:48:23,622 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:23,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:23,815 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-11-23 12:48:23,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 12:48:23,815 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-23 12:48:23,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:23,816 INFO L225 Difference]: With dead ends: 65 [2021-11-23 12:48:23,816 INFO L226 Difference]: Without dead ends: 65 [2021-11-23 12:48:23,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-11-23 12:48:23,818 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:23,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 172 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:48:23,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-23 12:48:23,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-11-23 12:48:23,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:23,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-11-23 12:48:23,821 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 25 [2021-11-23 12:48:23,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:23,821 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-11-23 12:48:23,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:23,822 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-11-23 12:48:23,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 12:48:23,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:23,823 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:23,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 12:48:23,823 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:23,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:23,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1805716590, now seen corresponding path program 1 times [2021-11-23 12:48:23,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:23,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690185002] [2021-11-23 12:48:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:23,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:48:24,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:24,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690185002] [2021-11-23 12:48:24,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690185002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:48:24,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:48:24,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-23 12:48:24,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935123606] [2021-11-23 12:48:24,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:48:24,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 12:48:24,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:24,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 12:48:24,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-23 12:48:24,064 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:24,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:24,297 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2021-11-23 12:48:24,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 12:48:24,298 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-23 12:48:24,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:24,299 INFO L225 Difference]: With dead ends: 93 [2021-11-23 12:48:24,299 INFO L226 Difference]: Without dead ends: 93 [2021-11-23 12:48:24,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-11-23 12:48:24,300 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 74 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:24,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 170 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:48:24,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-23 12:48:24,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2021-11-23 12:48:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:24,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-11-23 12:48:24,306 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 25 [2021-11-23 12:48:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:24,306 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-11-23 12:48:24,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:24,307 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-11-23 12:48:24,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 12:48:24,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:24,308 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:24,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 12:48:24,308 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:24,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:24,309 INFO L85 PathProgramCache]: Analyzing trace with hash -2113727723, now seen corresponding path program 1 times [2021-11-23 12:48:24,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:24,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681727530] [2021-11-23 12:48:24,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:24,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:48:24,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:24,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681727530] [2021-11-23 12:48:24,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681727530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:48:24,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257749977] [2021-11-23 12:48:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:24,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:48:24,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:48:24,519 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:48:24,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 12:48:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:24,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 12:48:24,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:48:24,644 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 12:48:24,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 12:48:24,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:48:24,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:48:24,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:48:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:48:25,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257749977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:48:25,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:48:25,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2021-11-23 12:48:25,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539987218] [2021-11-23 12:48:25,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:48:25,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 12:48:25,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:25,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 12:48:25,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-11-23 12:48:25,297 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:25,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:25,794 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2021-11-23 12:48:25,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 12:48:25,795 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-23 12:48:25,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:25,796 INFO L225 Difference]: With dead ends: 86 [2021-11-23 12:48:25,796 INFO L226 Difference]: Without dead ends: 86 [2021-11-23 12:48:25,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-11-23 12:48:25,798 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 203 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:25,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 218 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:48:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-23 12:48:25,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-11-23 12:48:25,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 79 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:25,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-11-23 12:48:25,802 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 29 [2021-11-23 12:48:25,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:25,803 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-11-23 12:48:25,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:25,803 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-11-23 12:48:25,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 12:48:25,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:25,804 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:25,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 12:48:26,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-23 12:48:26,016 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:26,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:26,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1128269345, now seen corresponding path program 2 times [2021-11-23 12:48:26,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:26,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008160177] [2021-11-23 12:48:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:26,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:26,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:26,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008160177] [2021-11-23 12:48:26,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008160177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:48:26,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144529168] [2021-11-23 12:48:26,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:48:26,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:48:26,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:48:26,343 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:48:26,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 12:48:26,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:48:26,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:48:26,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 12:48:26,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:48:26,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 12:48:27,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:48:27,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-23 12:48:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:27,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:48:28,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-23 12:48:28,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-23 12:48:28,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-23 12:48:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:28,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144529168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:48:28,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:48:28,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 37 [2021-11-23 12:48:28,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761115067] [2021-11-23 12:48:28,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:48:28,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 12:48:28,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:28,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 12:48:28,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 12:48:28,424 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:29,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:29,141 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2021-11-23 12:48:29,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 12:48:29,144 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 12:48:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:29,147 INFO L225 Difference]: With dead ends: 140 [2021-11-23 12:48:29,147 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 12:48:29,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=233, Invalid=2217, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 12:48:29,150 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 92 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:29,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 399 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 182 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2021-11-23 12:48:29,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 12:48:29,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2021-11-23 12:48:29,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.1401869158878504) internal successors, (122), 108 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:29,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2021-11-23 12:48:29,157 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 30 [2021-11-23 12:48:29,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:29,157 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2021-11-23 12:48:29,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:29,158 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2021-11-23 12:48:29,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 12:48:29,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:29,159 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:29,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 12:48:29,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 12:48:29,374 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:29,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:29,374 INFO L85 PathProgramCache]: Analyzing trace with hash -988436448, now seen corresponding path program 2 times [2021-11-23 12:48:29,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:29,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824002559] [2021-11-23 12:48:29,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:29,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:48:29,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:29,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824002559] [2021-11-23 12:48:29,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824002559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:48:29,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063364755] [2021-11-23 12:48:29,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:48:29,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:48:29,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:48:29,746 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:48:29,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 12:48:29,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:48:29,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:48:29,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 12:48:29,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:48:29,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 12:48:29,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 12:48:30,017 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-23 12:48:30,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-11-23 12:48:30,970 INFO L354 Elim1Store]: treesize reduction 39, result has 20.4 percent of original size [2021-11-23 12:48:30,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 39 [2021-11-23 12:48:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:48:31,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:48:33,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 70 [2021-11-23 12:48:33,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2021-11-23 12:48:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:48:33,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063364755] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:48:33,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:48:33,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2021-11-23 12:48:33,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575669058] [2021-11-23 12:48:33,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:48:33,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-23 12:48:33,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:33,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-23 12:48:33,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1425, Unknown=1, NotChecked=0, Total=1560 [2021-11-23 12:48:33,570 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 40 states, 40 states have (on average 2.575) internal successors, (103), 40 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:35,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:35,616 INFO L93 Difference]: Finished difference Result 196 states and 215 transitions. [2021-11-23 12:48:35,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-23 12:48:35,617 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.575) internal successors, (103), 40 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-23 12:48:35,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:35,619 INFO L225 Difference]: With dead ends: 196 [2021-11-23 12:48:35,619 INFO L226 Difference]: Without dead ends: 196 [2021-11-23 12:48:35,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=404, Invalid=3377, Unknown=1, NotChecked=0, Total=3782 [2021-11-23 12:48:35,622 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 184 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:35,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 704 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 379 Invalid, 0 Unknown, 143 Unchecked, 0.3s Time] [2021-11-23 12:48:35,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-23 12:48:35,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 175. [2021-11-23 12:48:35,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 173 states have (on average 1.1445086705202312) internal successors, (198), 174 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:35,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 198 transitions. [2021-11-23 12:48:35,629 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 198 transitions. Word has length 37 [2021-11-23 12:48:35,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:35,630 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 198 transitions. [2021-11-23 12:48:35,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.575) internal successors, (103), 40 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:35,630 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 198 transitions. [2021-11-23 12:48:35,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 12:48:35,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:35,631 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:35,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 12:48:35,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 12:48:35,850 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:35,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:35,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1971973557, now seen corresponding path program 3 times [2021-11-23 12:48:35,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:35,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115271913] [2021-11-23 12:48:35,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:35,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:36,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:36,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115271913] [2021-11-23 12:48:36,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115271913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:48:36,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587085795] [2021-11-23 12:48:36,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:48:36,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:48:36,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:48:36,112 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:48:36,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 12:48:36,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 12:48:36,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:48:36,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-23 12:48:36,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:48:36,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 12:48:36,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 12:48:36,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-23 12:48:37,367 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-11-23 12:48:37,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 23 [2021-11-23 12:48:37,378 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:37,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:48:38,084 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0) (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 2)) 0)) is different from false [2021-11-23 12:48:38,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:48:38,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-11-23 12:48:38,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:48:38,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2021-11-23 12:48:38,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 12:48:38,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:48:38,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2021-11-23 12:48:38,419 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:38,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587085795] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:48:38,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:48:38,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 16] total 42 [2021-11-23 12:48:38,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633559072] [2021-11-23 12:48:38,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:48:38,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-23 12:48:38,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:38,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-23 12:48:38,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1507, Unknown=1, NotChecked=78, Total=1722 [2021-11-23 12:48:38,422 INFO L87 Difference]: Start difference. First operand 175 states and 198 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:39,541 INFO L93 Difference]: Finished difference Result 408 states and 448 transitions. [2021-11-23 12:48:39,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-23 12:48:39,543 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-23 12:48:39,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:39,545 INFO L225 Difference]: With dead ends: 408 [2021-11-23 12:48:39,545 INFO L226 Difference]: Without dead ends: 360 [2021-11-23 12:48:39,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=367, Invalid=3796, Unknown=1, NotChecked=126, Total=4290 [2021-11-23 12:48:39,547 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 125 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:39,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 821 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 542 Invalid, 0 Unknown, 288 Unchecked, 0.3s Time] [2021-11-23 12:48:39,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-23 12:48:39,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 209. [2021-11-23 12:48:39,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.1400966183574879) internal successors, (236), 208 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 236 transitions. [2021-11-23 12:48:39,560 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 236 transitions. Word has length 39 [2021-11-23 12:48:39,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:39,560 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 236 transitions. [2021-11-23 12:48:39,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:39,560 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 236 transitions. [2021-11-23 12:48:39,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 12:48:39,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:39,562 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:39,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 12:48:39,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:48:39,786 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:39,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:39,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1978925873, now seen corresponding path program 1 times [2021-11-23 12:48:39,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:39,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460131842] [2021-11-23 12:48:39,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:39,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:48:40,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:40,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460131842] [2021-11-23 12:48:40,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460131842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:48:40,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335403520] [2021-11-23 12:48:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:40,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:48:40,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:48:40,146 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:48:40,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 12:48:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:40,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 12:48:40,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:48:40,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 12:48:41,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:48:41,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-23 12:48:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:48:41,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:48:42,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-23 12:48:42,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-23 12:48:42,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-23 12:48:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:48:42,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335403520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:48:42,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:48:42,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 37 [2021-11-23 12:48:42,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342301382] [2021-11-23 12:48:42,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:48:42,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 12:48:42,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:42,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 12:48:42,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 12:48:42,169 INFO L87 Difference]: Start difference. First operand 209 states and 236 transitions. Second operand has 37 states, 37 states have (on average 2.675675675675676) internal successors, (99), 37 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:43,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:43,413 INFO L93 Difference]: Finished difference Result 295 states and 326 transitions. [2021-11-23 12:48:43,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 12:48:43,413 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.675675675675676) internal successors, (99), 37 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-23 12:48:43,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:43,416 INFO L225 Difference]: With dead ends: 295 [2021-11-23 12:48:43,416 INFO L226 Difference]: Without dead ends: 264 [2021-11-23 12:48:43,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=335, Invalid=3087, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 12:48:43,419 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 90 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:43,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 380 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 115 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2021-11-23 12:48:43,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-23 12:48:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 233. [2021-11-23 12:48:43,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 231 states have (on average 1.1341991341991342) internal successors, (262), 232 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:43,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 262 transitions. [2021-11-23 12:48:43,428 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 262 transitions. Word has length 42 [2021-11-23 12:48:43,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:43,429 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 262 transitions. [2021-11-23 12:48:43,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.675675675675676) internal successors, (99), 37 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:43,430 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 262 transitions. [2021-11-23 12:48:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 12:48:43,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:43,431 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:43,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 12:48:43,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:48:43,646 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:43,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:43,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1860251704, now seen corresponding path program 4 times [2021-11-23 12:48:43,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:43,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913488316] [2021-11-23 12:48:43,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:43,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:43,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:43,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913488316] [2021-11-23 12:48:43,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913488316] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:48:43,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123293565] [2021-11-23 12:48:43,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:48:43,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:48:43,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:48:43,898 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:48:43,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 12:48:43,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:48:43,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:48:43,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-23 12:48:43,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:48:44,004 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:48:44,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:48:44,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 12:48:44,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:48:44,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-23 12:48:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:44,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:48:45,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-23 12:48:45,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-23 12:48:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:46,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123293565] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:48:46,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:48:46,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 43 [2021-11-23 12:48:46,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560268279] [2021-11-23 12:48:46,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:48:46,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 12:48:46,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:48:46,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 12:48:46,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 12:48:46,315 INFO L87 Difference]: Start difference. First operand 233 states and 262 transitions. Second operand has 44 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 44 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:48,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:48:48,379 INFO L93 Difference]: Finished difference Result 373 states and 413 transitions. [2021-11-23 12:48:48,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 12:48:48,379 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 44 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-23 12:48:48,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:48:48,382 INFO L225 Difference]: With dead ends: 373 [2021-11-23 12:48:48,382 INFO L226 Difference]: Without dead ends: 373 [2021-11-23 12:48:48,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=886, Invalid=4084, Unknown=0, NotChecked=0, Total=4970 [2021-11-23 12:48:48,384 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 473 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:48:48,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 600 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 698 Invalid, 0 Unknown, 137 Unchecked, 0.5s Time] [2021-11-23 12:48:48,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-11-23 12:48:48,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 266. [2021-11-23 12:48:48,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 264 states have (on average 1.1325757575757576) internal successors, (299), 265 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:48,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 299 transitions. [2021-11-23 12:48:48,396 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 299 transitions. Word has length 43 [2021-11-23 12:48:48,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:48:48,396 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 299 transitions. [2021-11-23 12:48:48,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 44 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:48:48,396 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 299 transitions. [2021-11-23 12:48:48,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 12:48:48,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:48:48,398 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:48:48,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 12:48:48,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:48:48,614 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:48:48,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:48:48,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1252507090, now seen corresponding path program 3 times [2021-11-23 12:48:48,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:48:48,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800886193] [2021-11-23 12:48:48,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:48:48,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:48:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:48:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:48:49,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:48:49,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800886193] [2021-11-23 12:48:49,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800886193] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:48:49,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206943554] [2021-11-23 12:48:49,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:48:49,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:48:49,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:48:49,554 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:48:49,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 12:48:49,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 12:48:49,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:48:49,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-23 12:48:49,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:48:49,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 12:48:49,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:48:50,011 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-23 12:48:50,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-23 12:48:50,724 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-23 12:48:50,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-11-23 12:48:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:48:50,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:49:00,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:49:00,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 12:49:01,062 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:49:01,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206943554] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:49:01,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:49:01,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 15] total 50 [2021-11-23 12:49:01,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076190911] [2021-11-23 12:49:01,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:49:01,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-23 12:49:01,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:49:01,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-23 12:49:01,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2303, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 12:49:01,067 INFO L87 Difference]: Start difference. First operand 266 states and 299 transitions. Second operand has 50 states, 50 states have (on average 2.44) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:03,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:49:03,001 INFO L93 Difference]: Finished difference Result 425 states and 469 transitions. [2021-11-23 12:49:03,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 12:49:03,001 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.44) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-23 12:49:03,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:49:03,004 INFO L225 Difference]: With dead ends: 425 [2021-11-23 12:49:03,004 INFO L226 Difference]: Without dead ends: 398 [2021-11-23 12:49:03,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=436, Invalid=5884, Unknown=0, NotChecked=0, Total=6320 [2021-11-23 12:49:03,007 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 241 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 563 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:49:03,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 1631 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 844 Invalid, 0 Unknown, 563 Unchecked, 0.5s Time] [2021-11-23 12:49:03,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-23 12:49:03,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 336. [2021-11-23 12:49:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 334 states have (on average 1.1347305389221556) internal successors, (379), 335 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 379 transitions. [2021-11-23 12:49:03,019 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 379 transitions. Word has length 49 [2021-11-23 12:49:03,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:49:03,019 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 379 transitions. [2021-11-23 12:49:03,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.44) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:03,020 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 379 transitions. [2021-11-23 12:49:03,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 12:49:03,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:49:03,021 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:49:03,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 12:49:03,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-23 12:49:03,250 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:49:03,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:49:03,250 INFO L85 PathProgramCache]: Analyzing trace with hash -839474363, now seen corresponding path program 2 times [2021-11-23 12:49:03,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:49:03,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317185294] [2021-11-23 12:49:03,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:49:03,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:49:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:49:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 12:49:03,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:49:03,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317185294] [2021-11-23 12:49:03,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317185294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:49:03,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267214873] [2021-11-23 12:49:03,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:49:03,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:49:03,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:49:03,844 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:49:03,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 12:49:03,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:49:03,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:49:03,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 12:49:03,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:49:04,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 12:49:05,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:49:05,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-23 12:49:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:49:05,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:49:06,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-23 12:49:06,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-11-23 12:49:06,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-11-23 12:49:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:49:06,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267214873] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:49:06,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:49:06,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 15] total 46 [2021-11-23 12:49:06,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285401577] [2021-11-23 12:49:06,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:49:06,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 12:49:06,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:49:06,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 12:49:06,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1924, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 12:49:06,228 INFO L87 Difference]: Start difference. First operand 336 states and 379 transitions. Second operand has 46 states, 46 states have (on average 2.652173913043478) internal successors, (122), 46 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:08,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:49:08,800 INFO L93 Difference]: Finished difference Result 436 states and 482 transitions. [2021-11-23 12:49:08,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-23 12:49:08,802 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.652173913043478) internal successors, (122), 46 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-23 12:49:08,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:49:08,806 INFO L225 Difference]: With dead ends: 436 [2021-11-23 12:49:08,807 INFO L226 Difference]: Without dead ends: 401 [2021-11-23 12:49:08,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=517, Invalid=5803, Unknown=0, NotChecked=0, Total=6320 [2021-11-23 12:49:08,810 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 185 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:49:08,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 883 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 603 Invalid, 0 Unknown, 408 Unchecked, 0.4s Time] [2021-11-23 12:49:08,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-23 12:49:08,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 330. [2021-11-23 12:49:08,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 328 states have (on average 1.1371951219512195) internal successors, (373), 329 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:08,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 373 transitions. [2021-11-23 12:49:08,823 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 373 transitions. Word has length 51 [2021-11-23 12:49:08,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:49:08,824 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 373 transitions. [2021-11-23 12:49:08,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.652173913043478) internal successors, (122), 46 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:08,824 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 373 transitions. [2021-11-23 12:49:08,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 12:49:08,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:49:08,826 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:49:08,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 12:49:09,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-23 12:49:09,042 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:49:09,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:49:09,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1185464536, now seen corresponding path program 5 times [2021-11-23 12:49:09,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:49:09,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710606726] [2021-11-23 12:49:09,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:49:09,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:49:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:49:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 49 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:49:09,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:49:09,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710606726] [2021-11-23 12:49:09,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710606726] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:49:09,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460784917] [2021-11-23 12:49:09,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:49:09,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:49:09,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:49:09,318 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:49:09,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 12:49:09,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-23 12:49:09,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:49:09,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 12:49:09,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:49:09,429 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:49:09,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:49:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:49:09,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:49:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:49:10,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460784917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:49:10,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:49:10,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2021-11-23 12:49:10,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087621520] [2021-11-23 12:49:10,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:49:10,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-23 12:49:10,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:49:10,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-23 12:49:10,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 12:49:10,311 INFO L87 Difference]: Start difference. First operand 330 states and 373 transitions. Second operand has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:11,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:49:11,446 INFO L93 Difference]: Finished difference Result 757 states and 833 transitions. [2021-11-23 12:49:11,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-23 12:49:11,456 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-23 12:49:11,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:49:11,462 INFO L225 Difference]: With dead ends: 757 [2021-11-23 12:49:11,462 INFO L226 Difference]: Without dead ends: 723 [2021-11-23 12:49:11,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=936, Invalid=3096, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 12:49:11,474 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 318 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:49:11,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 660 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 12:49:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-11-23 12:49:11,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 500. [2021-11-23 12:49:11,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 498 states have (on average 1.1365461847389557) internal successors, (566), 499 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:11,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 566 transitions. [2021-11-23 12:49:11,496 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 566 transitions. Word has length 53 [2021-11-23 12:49:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:49:11,497 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 566 transitions. [2021-11-23 12:49:11,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:11,497 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 566 transitions. [2021-11-23 12:49:11,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 12:49:11,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:49:11,499 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:49:11,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 12:49:11,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-23 12:49:11,722 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:49:11,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:49:11,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1963378865, now seen corresponding path program 4 times [2021-11-23 12:49:11,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:49:11,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281665759] [2021-11-23 12:49:11,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:49:11,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:49:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:49:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:49:11,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:49:11,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281665759] [2021-11-23 12:49:11,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281665759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:49:11,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063544718] [2021-11-23 12:49:11,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:49:11,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:49:11,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:49:11,946 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:49:11,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 12:49:12,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:49:12,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:49:12,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-23 12:49:12,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:49:12,064 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:49:12,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:49:12,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 12:49:12,678 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-23 12:49:12,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-11-23 12:49:13,388 INFO L354 Elim1Store]: treesize reduction 45, result has 18.2 percent of original size [2021-11-23 12:49:13,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2021-11-23 12:49:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:49:13,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:49:16,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 63 [2021-11-23 12:49:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:49:18,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063544718] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:49:18,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:49:18,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20, 21] total 51 [2021-11-23 12:49:18,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607236153] [2021-11-23 12:49:18,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:49:18,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-23 12:49:18,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:49:18,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-23 12:49:18,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=2389, Unknown=1, NotChecked=0, Total=2652 [2021-11-23 12:49:18,040 INFO L87 Difference]: Start difference. First operand 500 states and 566 transitions. Second operand has 52 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 52 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:22,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:49:22,557 INFO L93 Difference]: Finished difference Result 676 states and 751 transitions. [2021-11-23 12:49:22,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 12:49:22,558 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 52 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-23 12:49:22,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:49:22,561 INFO L225 Difference]: With dead ends: 676 [2021-11-23 12:49:22,562 INFO L226 Difference]: Without dead ends: 676 [2021-11-23 12:49:22,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1278, Invalid=7841, Unknown=1, NotChecked=0, Total=9120 [2021-11-23 12:49:22,565 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 485 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 12:49:22,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 1252 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1173 Invalid, 0 Unknown, 350 Unchecked, 0.9s Time] [2021-11-23 12:49:22,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-11-23 12:49:22,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 564. [2021-11-23 12:49:22,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 562 states have (on average 1.1370106761565837) internal successors, (639), 563 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:22,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 639 transitions. [2021-11-23 12:49:22,585 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 639 transitions. Word has length 53 [2021-11-23 12:49:22,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:49:22,585 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 639 transitions. [2021-11-23 12:49:22,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 52 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:22,586 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 639 transitions. [2021-11-23 12:49:22,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-23 12:49:22,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:49:22,588 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:49:22,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 12:49:22,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:49:22,806 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:49:22,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:49:22,806 INFO L85 PathProgramCache]: Analyzing trace with hash 678158875, now seen corresponding path program 6 times [2021-11-23 12:49:22,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:49:22,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704177396] [2021-11-23 12:49:22,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:49:22,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:49:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:49:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:49:23,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:49:23,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704177396] [2021-11-23 12:49:23,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704177396] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:49:23,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574966268] [2021-11-23 12:49:23,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:49:23,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:49:23,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:49:23,151 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:49:23,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 12:49:23,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-23 12:49:23,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:49:23,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-23 12:49:23,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:49:23,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:49:23,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:49:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:49:23,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:49:23,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:49:23,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 12:49:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:49:24,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574966268] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:49:24,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:49:24,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 36 [2021-11-23 12:49:24,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678239319] [2021-11-23 12:49:24,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:49:24,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 12:49:24,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:49:24,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 12:49:24,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 12:49:24,015 INFO L87 Difference]: Start difference. First operand 564 states and 639 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:25,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:49:25,073 INFO L93 Difference]: Finished difference Result 1045 states and 1163 transitions. [2021-11-23 12:49:25,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 12:49:25,074 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-23 12:49:25,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:49:25,080 INFO L225 Difference]: With dead ends: 1045 [2021-11-23 12:49:25,080 INFO L226 Difference]: Without dead ends: 997 [2021-11-23 12:49:25,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=383, Invalid=2373, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 12:49:25,082 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 386 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:49:25,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 1213 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 968 Invalid, 0 Unknown, 95 Unchecked, 0.5s Time] [2021-11-23 12:49:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-11-23 12:49:25,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 580. [2021-11-23 12:49:25,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 578 states have (on average 1.1384083044982698) internal successors, (658), 579 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:25,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 658 transitions. [2021-11-23 12:49:25,106 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 658 transitions. Word has length 57 [2021-11-23 12:49:25,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:49:25,106 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 658 transitions. [2021-11-23 12:49:25,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:25,106 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 658 transitions. [2021-11-23 12:49:25,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 12:49:25,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:49:25,108 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:49:25,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 12:49:25,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:49:25,322 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:49:25,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:49:25,322 INFO L85 PathProgramCache]: Analyzing trace with hash 118455529, now seen corresponding path program 3 times [2021-11-23 12:49:25,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:49:25,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356419712] [2021-11-23 12:49:25,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:49:25,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:49:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:49:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:49:25,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:49:25,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356419712] [2021-11-23 12:49:25,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356419712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:49:25,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074575034] [2021-11-23 12:49:25,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:49:25,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:49:25,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:49:25,609 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:49:25,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 12:49:25,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 12:49:25,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:49:25,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-23 12:49:25,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:49:25,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:49:26,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:49:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:49:26,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:49:26,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:49:26,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 12:49:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:49:26,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074575034] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:49:26,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:49:26,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 33 [2021-11-23 12:49:26,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047761237] [2021-11-23 12:49:26,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:49:26,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 12:49:26,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:49:26,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 12:49:26,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 12:49:26,539 INFO L87 Difference]: Start difference. First operand 580 states and 658 transitions. Second operand has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:49:27,310 INFO L93 Difference]: Finished difference Result 950 states and 1057 transitions. [2021-11-23 12:49:27,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 12:49:27,310 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-23 12:49:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:49:27,316 INFO L225 Difference]: With dead ends: 950 [2021-11-23 12:49:27,316 INFO L226 Difference]: Without dead ends: 828 [2021-11-23 12:49:27,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 12:49:27,317 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 171 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:49:27,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 742 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 610 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2021-11-23 12:49:27,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-11-23 12:49:27,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 657. [2021-11-23 12:49:27,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 655 states have (on average 1.132824427480916) internal successors, (742), 656 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 742 transitions. [2021-11-23 12:49:27,338 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 742 transitions. Word has length 60 [2021-11-23 12:49:27,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:49:27,338 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 742 transitions. [2021-11-23 12:49:27,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:27,339 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 742 transitions. [2021-11-23 12:49:27,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 12:49:27,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:49:27,341 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:49:27,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 12:49:27,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:49:27,554 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:49:27,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:49:27,554 INFO L85 PathProgramCache]: Analyzing trace with hash -27203543, now seen corresponding path program 4 times [2021-11-23 12:49:27,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:49:27,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867331841] [2021-11-23 12:49:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:49:27,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:49:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:49:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 35 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 12:49:27,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:49:27,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867331841] [2021-11-23 12:49:27,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867331841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:49:27,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243944114] [2021-11-23 12:49:27,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:49:27,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:49:27,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:49:27,784 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:49:27,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 12:49:27,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:49:27,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:49:27,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 12:49:27,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:49:27,891 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:49:27,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:49:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 12:49:28,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:49:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 12:49:28,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243944114] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:49:28,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:49:28,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2021-11-23 12:49:28,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58108395] [2021-11-23 12:49:28,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:49:28,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 12:49:28,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:49:28,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 12:49:28,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-11-23 12:49:28,550 INFO L87 Difference]: Start difference. First operand 657 states and 742 transitions. Second operand has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:29,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:49:29,239 INFO L93 Difference]: Finished difference Result 811 states and 904 transitions. [2021-11-23 12:49:29,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 12:49:29,239 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-23 12:49:29,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:49:29,247 INFO L225 Difference]: With dead ends: 811 [2021-11-23 12:49:29,247 INFO L226 Difference]: Without dead ends: 740 [2021-11-23 12:49:29,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=525, Invalid=1731, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 12:49:29,248 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 190 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:49:29,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 400 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:49:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-11-23 12:49:29,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 651. [2021-11-23 12:49:29,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 649 states have (on average 1.1325115562403698) internal successors, (735), 650 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:29,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 735 transitions. [2021-11-23 12:49:29,270 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 735 transitions. Word has length 60 [2021-11-23 12:49:29,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:49:29,271 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 735 transitions. [2021-11-23 12:49:29,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:29,272 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 735 transitions. [2021-11-23 12:49:29,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 12:49:29,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:49:29,274 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:49:29,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 12:49:29,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:49:29,492 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:49:29,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:49:29,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1164356062, now seen corresponding path program 7 times [2021-11-23 12:49:29,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:49:29,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694298992] [2021-11-23 12:49:29,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:49:29,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:49:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:49:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:49:29,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:49:29,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694298992] [2021-11-23 12:49:29,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694298992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:49:29,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390709049] [2021-11-23 12:49:29,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:49:29,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:49:29,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:49:29,880 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:49:29,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 12:49:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:49:29,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-23 12:49:29,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:49:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:49:30,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:49:30,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 12:49:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:49:30,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390709049] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:49:30,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:49:30,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 38 [2021-11-23 12:49:30,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667236736] [2021-11-23 12:49:30,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:49:30,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 12:49:30,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:49:30,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 12:49:30,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 12:49:30,965 INFO L87 Difference]: Start difference. First operand 651 states and 735 transitions. Second operand has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:32,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:49:32,086 INFO L93 Difference]: Finished difference Result 920 states and 1020 transitions. [2021-11-23 12:49:32,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 12:49:32,087 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-23 12:49:32,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:49:32,093 INFO L225 Difference]: With dead ends: 920 [2021-11-23 12:49:32,093 INFO L226 Difference]: Without dead ends: 920 [2021-11-23 12:49:32,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=627, Invalid=2679, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 12:49:32,095 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 345 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:49:32,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 798 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 12:49:32,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-11-23 12:49:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 695. [2021-11-23 12:49:32,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 693 states have (on average 1.1370851370851371) internal successors, (788), 694 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 788 transitions. [2021-11-23 12:49:32,121 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 788 transitions. Word has length 61 [2021-11-23 12:49:32,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:49:32,122 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 788 transitions. [2021-11-23 12:49:32,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:32,122 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 788 transitions. [2021-11-23 12:49:32,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 12:49:32,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:49:32,124 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:49:32,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 12:49:32,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-23 12:49:32,338 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:49:32,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:49:32,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1827605318, now seen corresponding path program 5 times [2021-11-23 12:49:32,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:49:32,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046035637] [2021-11-23 12:49:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:49:32,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:49:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:49:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 82 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:49:32,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:49:32,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046035637] [2021-11-23 12:49:32,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046035637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:49:32,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478639777] [2021-11-23 12:49:32,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:49:32,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:49:32,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:49:32,625 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:49:32,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 12:49:32,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-23 12:49:32,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:49:32,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-23 12:49:32,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:49:32,742 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:49:32,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:49:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:49:33,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:49:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 60 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:49:33,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478639777] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:49:33,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:49:33,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2021-11-23 12:49:33,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337194495] [2021-11-23 12:49:33,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:49:33,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 12:49:33,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:49:33,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 12:49:33,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 12:49:33,879 INFO L87 Difference]: Start difference. First operand 695 states and 788 transitions. Second operand has 36 states, 35 states have (on average 4.4) internal successors, (154), 36 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:34,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:49:34,857 INFO L93 Difference]: Finished difference Result 887 states and 987 transitions. [2021-11-23 12:49:34,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 12:49:34,858 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.4) internal successors, (154), 36 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-23 12:49:34,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:49:34,862 INFO L225 Difference]: With dead ends: 887 [2021-11-23 12:49:34,862 INFO L226 Difference]: Without dead ends: 769 [2021-11-23 12:49:34,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=575, Invalid=2287, Unknown=0, NotChecked=0, Total=2862 [2021-11-23 12:49:34,863 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 294 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:49:34,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 631 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 12:49:34,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-11-23 12:49:34,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 595. [2021-11-23 12:49:34,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 593 states have (on average 1.1349072512647556) internal successors, (673), 594 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:34,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 673 transitions. [2021-11-23 12:49:34,901 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 673 transitions. Word has length 64 [2021-11-23 12:49:34,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:49:34,901 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 673 transitions. [2021-11-23 12:49:34,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.4) internal successors, (154), 36 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:34,902 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 673 transitions. [2021-11-23 12:49:34,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 12:49:34,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:49:34,904 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:49:34,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 12:49:35,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-23 12:49:35,118 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:49:35,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:49:35,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1970176257, now seen corresponding path program 5 times [2021-11-23 12:49:35,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:49:35,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345985961] [2021-11-23 12:49:35,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:49:35,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:49:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:49:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:49:36,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:49:36,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345985961] [2021-11-23 12:49:36,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345985961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:49:36,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777403201] [2021-11-23 12:49:36,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:49:36,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:49:36,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:49:36,383 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:49:36,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 12:49:36,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-23 12:49:36,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:49:36,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-23 12:49:36,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:49:36,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 12:49:37,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:49:37,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-23 12:49:39,132 INFO L354 Elim1Store]: treesize reduction 72, result has 10.0 percent of original size [2021-11-23 12:49:39,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 34 [2021-11-23 12:49:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 12:49:39,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:49:40,673 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~length2~0#1| Int)) (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (= .cse0 0) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| .cse1) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) .cse0)))))) is different from false [2021-11-23 12:49:40,691 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-23 12:49:40,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 207 treesize of output 167 [2021-11-23 12:49:40,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:49:40,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 157 [2021-11-23 12:49:40,828 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-11-23 12:49:40,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-11-23 12:49:40,924 INFO L354 Elim1Store]: treesize reduction 9, result has 74.3 percent of original size [2021-11-23 12:49:40,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-11-23 12:49:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 12:49:41,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777403201] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:49:41,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:49:41,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 25, 25] total 69 [2021-11-23 12:49:41,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727870295] [2021-11-23 12:49:41,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:49:41,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-23 12:49:41,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:49:41,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-23 12:49:41,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=4342, Unknown=1, NotChecked=132, Total=4692 [2021-11-23 12:49:41,448 INFO L87 Difference]: Start difference. First operand 595 states and 673 transitions. Second operand has 69 states, 69 states have (on average 2.289855072463768) internal successors, (158), 69 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:49:48,901 WARN L227 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 65 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 12:49:59,922 WARN L227 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 56 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 12:50:00,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:50:00,935 INFO L93 Difference]: Finished difference Result 1053 states and 1175 transitions. [2021-11-23 12:50:00,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 12:50:00,936 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.289855072463768) internal successors, (158), 69 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-23 12:50:00,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:50:00,941 INFO L225 Difference]: With dead ends: 1053 [2021-11-23 12:50:00,941 INFO L226 Difference]: Without dead ends: 1018 [2021-11-23 12:50:00,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2036 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=505, Invalid=9200, Unknown=1, NotChecked=194, Total=9900 [2021-11-23 12:50:00,942 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 297 mSDsluCounter, 2874 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 2962 SdHoareTripleChecker+Invalid, 2629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 771 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:50:00,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 2962 Invalid, 2629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1829 Invalid, 0 Unknown, 771 Unchecked, 1.0s Time] [2021-11-23 12:50:00,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-11-23 12:50:00,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 888. [2021-11-23 12:50:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 886 states have (on average 1.136568848758465) internal successors, (1007), 887 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1007 transitions. [2021-11-23 12:50:00,969 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1007 transitions. Word has length 65 [2021-11-23 12:50:00,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:50:00,970 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1007 transitions. [2021-11-23 12:50:00,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.289855072463768) internal successors, (158), 69 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1007 transitions. [2021-11-23 12:50:00,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 12:50:00,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:50:00,990 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:50:01,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 12:50:01,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-23 12:50:01,206 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:50:01,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:50:01,206 INFO L85 PathProgramCache]: Analyzing trace with hash 147941651, now seen corresponding path program 8 times [2021-11-23 12:50:01,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:50:01,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580739309] [2021-11-23 12:50:01,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:50:01,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:50:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:50:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:50:01,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:50:01,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580739309] [2021-11-23 12:50:01,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580739309] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:50:01,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042821586] [2021-11-23 12:50:01,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:50:01,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:50:01,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:50:01,598 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:50:01,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 12:50:01,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:50:01,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:50:01,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-23 12:50:01,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:50:01,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:50:02,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:50:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:50:02,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:50:02,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:50:02,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 12:50:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:50:02,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042821586] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:50:02,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:50:02,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 39 [2021-11-23 12:50:02,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070856392] [2021-11-23 12:50:02,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:50:02,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 12:50:02,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:50:02,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 12:50:02,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 12:50:02,506 INFO L87 Difference]: Start difference. First operand 888 states and 1007 transitions. Second operand has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:03,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:50:03,683 INFO L93 Difference]: Finished difference Result 1509 states and 1677 transitions. [2021-11-23 12:50:03,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 12:50:03,683 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-23 12:50:03,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:50:03,688 INFO L225 Difference]: With dead ends: 1509 [2021-11-23 12:50:03,688 INFO L226 Difference]: Without dead ends: 1344 [2021-11-23 12:50:03,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=391, Invalid=3031, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 12:50:03,689 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 364 mSDsluCounter, 1814 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1907 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:50:03,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 1907 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1588 Invalid, 0 Unknown, 56 Unchecked, 0.6s Time] [2021-11-23 12:50:03,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-11-23 12:50:03,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1120. [2021-11-23 12:50:03,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1118 states have (on average 1.1359570661896243) internal successors, (1270), 1119 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:03,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1270 transitions. [2021-11-23 12:50:03,716 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1270 transitions. Word has length 66 [2021-11-23 12:50:03,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:50:03,716 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1270 transitions. [2021-11-23 12:50:03,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:03,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1270 transitions. [2021-11-23 12:50:03,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 12:50:03,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:50:03,719 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:50:03,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 12:50:03,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-23 12:50:03,942 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:50:03,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:50:03,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1600167810, now seen corresponding path program 6 times [2021-11-23 12:50:03,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:50:03,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007697690] [2021-11-23 12:50:03,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:50:03,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:50:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:50:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 12:50:04,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:50:04,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007697690] [2021-11-23 12:50:04,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007697690] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:50:04,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117382418] [2021-11-23 12:50:04,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:50:04,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:50:04,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:50:04,198 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:50:04,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 12:50:04,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-23 12:50:04,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:50:04,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-23 12:50:04,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:50:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 12:50:04,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:50:05,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:50:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 12:50:05,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117382418] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:50:05,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:50:05,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2021-11-23 12:50:05,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308996254] [2021-11-23 12:50:05,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:50:05,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 12:50:05,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:50:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 12:50:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 12:50:05,467 INFO L87 Difference]: Start difference. First operand 1120 states and 1270 transitions. Second operand has 34 states, 33 states have (on average 4.696969696969697) internal successors, (155), 34 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:06,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:50:06,217 INFO L93 Difference]: Finished difference Result 1447 states and 1633 transitions. [2021-11-23 12:50:06,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 12:50:06,218 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.696969696969697) internal successors, (155), 34 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-23 12:50:06,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:50:06,223 INFO L225 Difference]: With dead ends: 1447 [2021-11-23 12:50:06,223 INFO L226 Difference]: Without dead ends: 1447 [2021-11-23 12:50:06,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=523, Invalid=2027, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 12:50:06,224 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 482 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:50:06,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 945 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 12:50:06,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-11-23 12:50:06,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1224. [2021-11-23 12:50:06,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1222 states have (on average 1.1374795417348609) internal successors, (1390), 1223 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:06,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1390 transitions. [2021-11-23 12:50:06,252 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1390 transitions. Word has length 69 [2021-11-23 12:50:06,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:50:06,252 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 1390 transitions. [2021-11-23 12:50:06,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.696969696969697) internal successors, (155), 34 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:06,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1390 transitions. [2021-11-23 12:50:06,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 12:50:06,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:50:06,255 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:50:06,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 12:50:06,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-23 12:50:06,475 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:50:06,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:50:06,476 INFO L85 PathProgramCache]: Analyzing trace with hash 267889840, now seen corresponding path program 9 times [2021-11-23 12:50:06,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:50:06,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091898069] [2021-11-23 12:50:06,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:50:06,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:50:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:50:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 28 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:50:06,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:50:06,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091898069] [2021-11-23 12:50:06,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091898069] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:50:06,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610699163] [2021-11-23 12:50:06,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:50:06,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:50:06,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:50:06,930 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:50:06,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 12:50:07,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 12:50:07,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:50:07,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-23 12:50:07,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:50:07,074 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:50:07,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:50:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 45 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:50:07,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:50:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 66 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:50:08,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610699163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:50:08,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:50:08,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 56 [2021-11-23 12:50:08,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063829875] [2021-11-23 12:50:08,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:50:08,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-23 12:50:08,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:50:08,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-23 12:50:08,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2800, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 12:50:08,862 INFO L87 Difference]: Start difference. First operand 1224 states and 1390 transitions. Second operand has 57 states, 56 states have (on average 3.607142857142857) internal successors, (202), 57 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:10,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:50:10,461 INFO L93 Difference]: Finished difference Result 1624 states and 1810 transitions. [2021-11-23 12:50:10,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-23 12:50:10,462 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.607142857142857) internal successors, (202), 57 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-23 12:50:10,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:50:10,468 INFO L225 Difference]: With dead ends: 1624 [2021-11-23 12:50:10,468 INFO L226 Difference]: Without dead ends: 1624 [2021-11-23 12:50:10,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1376, Invalid=5430, Unknown=0, NotChecked=0, Total=6806 [2021-11-23 12:50:10,469 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 671 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:50:10,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 808 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 12:50:10,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2021-11-23 12:50:10,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1279. [2021-11-23 12:50:10,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1277 states have (on average 1.139389193422083) internal successors, (1455), 1278 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:10,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1455 transitions. [2021-11-23 12:50:10,501 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1455 transitions. Word has length 70 [2021-11-23 12:50:10,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:50:10,501 INFO L470 AbstractCegarLoop]: Abstraction has 1279 states and 1455 transitions. [2021-11-23 12:50:10,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.607142857142857) internal successors, (202), 57 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:10,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1455 transitions. [2021-11-23 12:50:10,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 12:50:10,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:50:10,504 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:50:10,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 12:50:10,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-23 12:50:10,730 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:50:10,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:50:10,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1559326514, now seen corresponding path program 1 times [2021-11-23 12:50:10,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:50:10,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747862405] [2021-11-23 12:50:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:50:10,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:50:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:50:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 8 proven. 85 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:50:11,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:50:11,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747862405] [2021-11-23 12:50:11,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747862405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:50:11,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117454622] [2021-11-23 12:50:11,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:50:11,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:50:11,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:50:11,764 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:50:11,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 12:50:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:50:11,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-23 12:50:11,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:50:11,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 12:50:12,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:50:12,236 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-23 12:50:12,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-23 12:50:13,169 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-23 12:50:13,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-11-23 12:50:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 12:50:13,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:50:19,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:50:19,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 12:50:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 8 proven. 79 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 12:50:19,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117454622] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:50:19,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:50:19,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 17] total 46 [2021-11-23 12:50:19,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748825067] [2021-11-23 12:50:19,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:50:19,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 12:50:19,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:50:19,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 12:50:19,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1937, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 12:50:19,410 INFO L87 Difference]: Start difference. First operand 1279 states and 1455 transitions. Second operand has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:21,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:50:21,033 INFO L93 Difference]: Finished difference Result 1363 states and 1533 transitions. [2021-11-23 12:50:21,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 12:50:21,034 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-23 12:50:21,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:50:21,039 INFO L225 Difference]: With dead ends: 1363 [2021-11-23 12:50:21,040 INFO L226 Difference]: Without dead ends: 1072 [2021-11-23 12:50:21,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=374, Invalid=3916, Unknown=0, NotChecked=0, Total=4290 [2021-11-23 12:50:21,041 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 197 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:50:21,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1234 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 959 Invalid, 0 Unknown, 70 Unchecked, 0.5s Time] [2021-11-23 12:50:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-11-23 12:50:21,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 945. [2021-11-23 12:50:21,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 943 states have (on average 1.1389183457051961) internal successors, (1074), 944 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:21,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1074 transitions. [2021-11-23 12:50:21,062 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1074 transitions. Word has length 70 [2021-11-23 12:50:21,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:50:21,063 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 1074 transitions. [2021-11-23 12:50:21,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:21,063 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1074 transitions. [2021-11-23 12:50:21,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 12:50:21,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:50:21,065 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:50:21,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 12:50:21,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-23 12:50:21,290 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:50:21,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:50:21,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2007377610, now seen corresponding path program 7 times [2021-11-23 12:50:21,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:50:21,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440316519] [2021-11-23 12:50:21,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:50:21,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:50:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:50:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:50:21,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:50:21,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440316519] [2021-11-23 12:50:21,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440316519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:50:21,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538960639] [2021-11-23 12:50:21,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:50:21,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:50:21,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:50:21,914 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:50:21,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 12:50:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:50:22,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 127 conjunts are in the unsatisfiable core [2021-11-23 12:50:22,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:50:22,044 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:50:22,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:50:22,724 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 21 treesize of output 17 [2021-11-23 12:50:22,815 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-11-23 12:50:22,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-23 12:50:23,949 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 12:50:23,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-23 12:50:25,269 INFO L354 Elim1Store]: treesize reduction 77, result has 3.8 percent of original size [2021-11-23 12:50:25,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 39 [2021-11-23 12:50:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:50:25,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:50:26,504 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-23 12:50:26,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 214 treesize of output 174 [2021-11-23 12:50:26,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:50:26,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 164 [2021-11-23 12:50:26,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:50:26,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 17 [2021-11-23 12:50:26,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:50:26,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:50:26,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 72 [2021-11-23 12:50:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 15 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:50:29,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538960639] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:50:29,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:50:29,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 34, 33] total 83 [2021-11-23 12:50:29,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970271878] [2021-11-23 12:50:29,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:50:29,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-23 12:50:29,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:50:29,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-23 12:50:29,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=6424, Unknown=0, NotChecked=0, Total=6806 [2021-11-23 12:50:29,109 INFO L87 Difference]: Start difference. First operand 945 states and 1074 transitions. Second operand has 83 states, 83 states have (on average 2.397590361445783) internal successors, (199), 83 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:32,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:50:32,963 INFO L93 Difference]: Finished difference Result 1764 states and 1987 transitions. [2021-11-23 12:50:32,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-23 12:50:32,964 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.397590361445783) internal successors, (199), 83 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-23 12:50:32,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:50:32,969 INFO L225 Difference]: With dead ends: 1764 [2021-11-23 12:50:32,970 INFO L226 Difference]: Without dead ends: 1721 [2021-11-23 12:50:32,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3505 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=859, Invalid=15143, Unknown=0, NotChecked=0, Total=16002 [2021-11-23 12:50:32,971 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 389 mSDsluCounter, 2581 mSDsCounter, 0 mSdLazyCounter, 2605 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 2665 SdHoareTripleChecker+Invalid, 4058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1430 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:50:32,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 2665 Invalid, 4058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2605 Invalid, 0 Unknown, 1430 Unchecked, 1.2s Time] [2021-11-23 12:50:32,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-11-23 12:50:32,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1461. [2021-11-23 12:50:32,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1459 states have (on average 1.1405071967100755) internal successors, (1664), 1460 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:32,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 1664 transitions. [2021-11-23 12:50:32,999 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 1664 transitions. Word has length 73 [2021-11-23 12:50:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:50:32,999 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 1664 transitions. [2021-11-23 12:50:33,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.397590361445783) internal successors, (199), 83 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:33,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 1664 transitions. [2021-11-23 12:50:33,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 12:50:33,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:50:33,003 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:50:33,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 12:50:33,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:50:33,218 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:50:33,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:50:33,218 INFO L85 PathProgramCache]: Analyzing trace with hash 15423873, now seen corresponding path program 10 times [2021-11-23 12:50:33,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:50:33,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119732131] [2021-11-23 12:50:33,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:50:33,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:50:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:50:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 20 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:50:33,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:50:33,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119732131] [2021-11-23 12:50:33,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119732131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:50:33,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231608052] [2021-11-23 12:50:33,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:50:33,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:50:33,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:50:33,624 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:50:33,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 12:50:33,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:50:33,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:50:33,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-23 12:50:33,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:50:33,727 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:50:33,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:50:34,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 12:50:34,988 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-23 12:50:34,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-11-23 12:50:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 96 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:50:34,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:50:35,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-11-23 12:50:35,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-23 12:50:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 95 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:50:36,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231608052] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:50:36,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:50:36,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 65 [2021-11-23 12:50:36,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089845621] [2021-11-23 12:50:36,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:50:36,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-23 12:50:36,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:50:36,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-23 12:50:36,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=3825, Unknown=0, NotChecked=0, Total=4160 [2021-11-23 12:50:36,639 INFO L87 Difference]: Start difference. First operand 1461 states and 1664 transitions. Second operand has 65 states, 65 states have (on average 3.1846153846153844) internal successors, (207), 65 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:43,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:50:43,871 INFO L93 Difference]: Finished difference Result 2797 states and 3105 transitions. [2021-11-23 12:50:43,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-11-23 12:50:43,872 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.1846153846153844) internal successors, (207), 65 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-23 12:50:43,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:50:43,880 INFO L225 Difference]: With dead ends: 2797 [2021-11-23 12:50:43,880 INFO L226 Difference]: Without dead ends: 2427 [2021-11-23 12:50:43,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 144 SyntacticMatches, 14 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8975 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=3457, Invalid=28049, Unknown=0, NotChecked=0, Total=31506 [2021-11-23 12:50:43,882 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 1879 mSDsluCounter, 3714 mSDsCounter, 0 mSdLazyCounter, 3835 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1879 SdHoareTripleChecker+Valid, 3849 SdHoareTripleChecker+Invalid, 4969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 3835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 877 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 12:50:43,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1879 Valid, 3849 Invalid, 4969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 3835 Invalid, 0 Unknown, 877 Unchecked, 1.8s Time] [2021-11-23 12:50:43,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-11-23 12:50:43,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 1992. [2021-11-23 12:50:43,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1990 states have (on average 1.1381909547738693) internal successors, (2265), 1991 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:43,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 2265 transitions. [2021-11-23 12:50:43,920 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 2265 transitions. Word has length 75 [2021-11-23 12:50:43,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:50:43,920 INFO L470 AbstractCegarLoop]: Abstraction has 1992 states and 2265 transitions. [2021-11-23 12:50:43,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.1846153846153844) internal successors, (207), 65 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:43,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 2265 transitions. [2021-11-23 12:50:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 12:50:43,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:50:43,924 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:50:43,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-23 12:50:44,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:50:44,150 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:50:44,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:50:44,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2052723789, now seen corresponding path program 8 times [2021-11-23 12:50:44,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:50:44,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331431722] [2021-11-23 12:50:44,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:50:44,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:50:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:50:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 15 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:50:44,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:50:44,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331431722] [2021-11-23 12:50:44,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331431722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:50:44,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524767397] [2021-11-23 12:50:44,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:50:44,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:50:44,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:50:44,454 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:50:44,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 12:50:44,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:50:44,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:50:44,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-23 12:50:44,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:50:44,570 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 12:50:44,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 12:50:44,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:50:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:50:45,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:50:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:50:46,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524767397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:50:46,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:50:46,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 44 [2021-11-23 12:50:46,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114959219] [2021-11-23 12:50:46,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:50:46,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-23 12:50:46,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:50:46,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-23 12:50:46,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 12:50:46,192 INFO L87 Difference]: Start difference. First operand 1992 states and 2265 transitions. Second operand has 45 states, 44 states have (on average 5.068181818181818) internal successors, (223), 45 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:47,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:50:47,701 INFO L93 Difference]: Finished difference Result 2541 states and 2879 transitions. [2021-11-23 12:50:47,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 12:50:47,701 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 5.068181818181818) internal successors, (223), 45 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 12:50:47,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:50:47,710 INFO L225 Difference]: With dead ends: 2541 [2021-11-23 12:50:47,710 INFO L226 Difference]: Without dead ends: 2541 [2021-11-23 12:50:47,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=915, Invalid=4341, Unknown=0, NotChecked=0, Total=5256 [2021-11-23 12:50:47,711 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 645 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:50:47,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 1232 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 12:50:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-11-23 12:50:47,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2142. [2021-11-23 12:50:47,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2140 states have (on average 1.138785046728972) internal successors, (2437), 2141 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:47,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 2437 transitions. [2021-11-23 12:50:47,768 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 2437 transitions. Word has length 77 [2021-11-23 12:50:47,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:50:47,768 INFO L470 AbstractCegarLoop]: Abstraction has 2142 states and 2437 transitions. [2021-11-23 12:50:47,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 5.068181818181818) internal successors, (223), 45 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:47,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 2437 transitions. [2021-11-23 12:50:47,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 12:50:47,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:50:47,772 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:50:47,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-23 12:50:47,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-23 12:50:47,998 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:50:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:50:47,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1372924284, now seen corresponding path program 11 times [2021-11-23 12:50:47,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:50:47,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618819173] [2021-11-23 12:50:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:50:47,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:50:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:50:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 45 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:50:48,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:50:48,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618819173] [2021-11-23 12:50:48,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618819173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:50:48,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090211944] [2021-11-23 12:50:48,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:50:48,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:50:48,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:50:48,438 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:50:48,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 12:50:48,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-23 12:50:48,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:50:48,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-23 12:50:48,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:50:48,573 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:50:48,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:50:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 66 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:50:49,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:50:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 91 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:50:50,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090211944] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:50:50,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:50:50,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 50 [2021-11-23 12:50:50,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771842897] [2021-11-23 12:50:50,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:50:50,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 12:50:50,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:50:50,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 12:50:50,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2251, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 12:50:50,121 INFO L87 Difference]: Start difference. First operand 2142 states and 2437 transitions. Second operand has 51 states, 50 states have (on average 4.06) internal successors, (203), 51 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:51,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:50:51,767 INFO L93 Difference]: Finished difference Result 3024 states and 3402 transitions. [2021-11-23 12:50:51,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-23 12:50:51,773 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.06) internal successors, (203), 51 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 12:50:51,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:50:51,783 INFO L225 Difference]: With dead ends: 3024 [2021-11-23 12:50:51,783 INFO L226 Difference]: Without dead ends: 3024 [2021-11-23 12:50:51,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1262, Invalid=5218, Unknown=0, NotChecked=0, Total=6480 [2021-11-23 12:50:51,784 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 513 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 12:50:51,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 1230 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1613 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 12:50:51,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2021-11-23 12:50:51,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2505. [2021-11-23 12:50:51,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2503 states have (on average 1.1466240511386336) internal successors, (2870), 2504 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 2870 transitions. [2021-11-23 12:50:51,818 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 2870 transitions. Word has length 79 [2021-11-23 12:50:51,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:50:51,818 INFO L470 AbstractCegarLoop]: Abstraction has 2505 states and 2870 transitions. [2021-11-23 12:50:51,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.06) internal successors, (203), 51 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:50:51,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 2870 transitions. [2021-11-23 12:50:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 12:50:51,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:50:51,822 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:50:51,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-23 12:50:52,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-23 12:50:52,038 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:50:52,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:50:52,038 INFO L85 PathProgramCache]: Analyzing trace with hash -2122268416, now seen corresponding path program 2 times [2021-11-23 12:50:52,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:50:52,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965951363] [2021-11-23 12:50:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:50:52,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:50:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:50:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 12:50:52,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:50:52,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965951363] [2021-11-23 12:50:52,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965951363] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:50:52,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888566409] [2021-11-23 12:50:52,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:50:52,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:50:52,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:50:52,508 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:50:52,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-23 12:50:52,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:50:52,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:50:52,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-23 12:50:52,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:50:52,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 12:50:52,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:50:53,016 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-23 12:50:53,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-23 12:50:54,069 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-23 12:50:54,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-11-23 12:50:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 11 proven. 128 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 12:50:54,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:51:00,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:51:00,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 12:51:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 12:51:00,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888566409] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:51:00,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:51:00,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 45 [2021-11-23 12:51:00,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400500349] [2021-11-23 12:51:00,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:51:00,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-23 12:51:00,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:51:00,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-23 12:51:00,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1845, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 12:51:00,918 INFO L87 Difference]: Start difference. First operand 2505 states and 2870 transitions. Second operand has 45 states, 45 states have (on average 3.7111111111111112) internal successors, (167), 45 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:51:01,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:51:01,665 INFO L93 Difference]: Finished difference Result 2656 states and 3014 transitions. [2021-11-23 12:51:01,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 12:51:01,674 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.7111111111111112) internal successors, (167), 45 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-23 12:51:01,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:51:01,682 INFO L225 Difference]: With dead ends: 2656 [2021-11-23 12:51:01,682 INFO L226 Difference]: Without dead ends: 2159 [2021-11-23 12:51:01,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=226, Invalid=2966, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 12:51:01,684 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 137 mSDsluCounter, 1751 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:51:01,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1825 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 798 Invalid, 0 Unknown, 190 Unchecked, 0.3s Time] [2021-11-23 12:51:01,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2021-11-23 12:51:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 1887. [2021-11-23 12:51:01,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1885 states have (on average 1.1442970822281167) internal successors, (2157), 1886 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:51:01,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 2157 transitions. [2021-11-23 12:51:01,706 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 2157 transitions. Word has length 82 [2021-11-23 12:51:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:51:01,707 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 2157 transitions. [2021-11-23 12:51:01,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.7111111111111112) internal successors, (167), 45 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:51:01,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 2157 transitions. [2021-11-23 12:51:01,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-23 12:51:01,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:51:01,710 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:51:01,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-23 12:51:01,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:51:01,938 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:51:01,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:51:01,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1425198035, now seen corresponding path program 12 times [2021-11-23 12:51:01,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:51:01,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258952597] [2021-11-23 12:51:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:51:01,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:51:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:51:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 23 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:51:02,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:51:02,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258952597] [2021-11-23 12:51:02,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258952597] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:51:02,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008801384] [2021-11-23 12:51:02,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:51:02,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:51:02,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:51:02,359 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:51:02,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-23 12:51:02,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-23 12:51:02,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:51:02,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-23 12:51:02,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:51:02,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:51:03,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:51:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 23 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:51:03,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:51:03,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:51:03,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 12:51:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 23 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:51:03,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008801384] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:51:03,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:51:03,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 45 [2021-11-23 12:51:03,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519305807] [2021-11-23 12:51:03,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:51:03,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-23 12:51:03,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:51:03,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-23 12:51:03,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1845, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 12:51:03,380 INFO L87 Difference]: Start difference. First operand 1887 states and 2157 transitions. Second operand has 45 states, 45 states have (on average 3.0) internal successors, (135), 45 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:51:05,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:51:05,213 INFO L93 Difference]: Finished difference Result 2750 states and 3091 transitions. [2021-11-23 12:51:05,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-23 12:51:05,214 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.0) internal successors, (135), 45 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-23 12:51:05,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:51:05,224 INFO L225 Difference]: With dead ends: 2750 [2021-11-23 12:51:05,225 INFO L226 Difference]: Without dead ends: 2417 [2021-11-23 12:51:05,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=488, Invalid=4068, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 12:51:05,226 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 537 mSDsluCounter, 3040 mSDsCounter, 0 mSdLazyCounter, 2682 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 3170 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:51:05,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 3170 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2682 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 12:51:05,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-11-23 12:51:05,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 2144. [2021-11-23 12:51:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 2142 states have (on average 1.1447245564892623) internal successors, (2452), 2143 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:51:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 2452 transitions. [2021-11-23 12:51:05,248 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 2452 transitions. Word has length 84 [2021-11-23 12:51:05,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:51:05,249 INFO L470 AbstractCegarLoop]: Abstraction has 2144 states and 2452 transitions. [2021-11-23 12:51:05,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.0) internal successors, (135), 45 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:51:05,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 2452 transitions. [2021-11-23 12:51:05,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 12:51:05,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:51:05,252 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:51:05,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-23 12:51:05,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-23 12:51:05,469 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:51:05,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:51:05,469 INFO L85 PathProgramCache]: Analyzing trace with hash 701755736, now seen corresponding path program 9 times [2021-11-23 12:51:05,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:51:05,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145044306] [2021-11-23 12:51:05,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:51:05,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:51:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:51:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 12 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:51:06,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:51:06,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145044306] [2021-11-23 12:51:06,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145044306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:51:06,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260013330] [2021-11-23 12:51:06,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:51:06,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:51:06,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:51:06,178 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:51:06,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-23 12:51:06,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 12:51:06,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:51:06,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-23 12:51:06,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:51:06,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 12:51:06,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:51:06,765 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-23 12:51:06,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-23 12:51:08,133 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-23 12:51:08,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-11-23 12:51:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 12 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:51:08,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:51:18,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:51:18,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 12:51:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 12 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:51:19,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260013330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:51:19,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:51:19,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 22, 21] total 63 [2021-11-23 12:51:19,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144593828] [2021-11-23 12:51:19,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:51:19,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-23 12:51:19,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:51:19,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-23 12:51:19,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3727, Unknown=0, NotChecked=0, Total=3906 [2021-11-23 12:51:19,178 INFO L87 Difference]: Start difference. First operand 2144 states and 2452 transitions. Second operand has 63 states, 63 states have (on average 3.6507936507936507) internal successors, (230), 63 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:51:21,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:51:21,323 INFO L93 Difference]: Finished difference Result 4300 states and 4889 transitions. [2021-11-23 12:51:21,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-23 12:51:21,323 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.6507936507936507) internal successors, (230), 63 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-23 12:51:21,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:51:21,334 INFO L225 Difference]: With dead ends: 4300 [2021-11-23 12:51:21,334 INFO L226 Difference]: Without dead ends: 2964 [2021-11-23 12:51:21,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=381, Invalid=8549, Unknown=0, NotChecked=0, Total=8930 [2021-11-23 12:51:21,335 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 178 mSDsluCounter, 2523 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 2602 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:51:21,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 2602 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1519 Invalid, 0 Unknown, 318 Unchecked, 0.6s Time] [2021-11-23 12:51:21,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-11-23 12:51:21,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2334. [2021-11-23 12:51:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2332 states have (on average 1.1436535162950257) internal successors, (2667), 2333 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:51:21,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 2667 transitions. [2021-11-23 12:51:21,363 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 2667 transitions. Word has length 85 [2021-11-23 12:51:21,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:51:21,363 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 2667 transitions. [2021-11-23 12:51:21,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.6507936507936507) internal successors, (230), 63 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:51:21,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 2667 transitions. [2021-11-23 12:51:21,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 12:51:21,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:51:21,366 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:51:21,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-23 12:51:21,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-23 12:51:21,566 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:51:21,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:51:21,566 INFO L85 PathProgramCache]: Analyzing trace with hash 767994506, now seen corresponding path program 13 times [2021-11-23 12:51:21,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:51:21,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397871169] [2021-11-23 12:51:21,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:51:21,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:51:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:51:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 66 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:51:21,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:51:21,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397871169] [2021-11-23 12:51:21,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397871169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:51:21,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711168676] [2021-11-23 12:51:21,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:51:21,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:51:21,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:51:21,968 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:51:21,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-23 12:51:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:51:22,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-23 12:51:22,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:51:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:51:22,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:51:23,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 12:51:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:51:23,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711168676] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:51:23,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:51:23,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 50 [2021-11-23 12:51:23,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810071858] [2021-11-23 12:51:23,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:51:23,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 12:51:23,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:51:23,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 12:51:23,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2285, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 12:51:23,204 INFO L87 Difference]: Start difference. First operand 2334 states and 2667 transitions. Second operand has 51 states, 50 states have (on average 3.58) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:51:24,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:51:24,806 INFO L93 Difference]: Finished difference Result 2829 states and 3178 transitions. [2021-11-23 12:51:24,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 12:51:24,807 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.58) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-23 12:51:24,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:51:24,811 INFO L225 Difference]: With dead ends: 2829 [2021-11-23 12:51:24,812 INFO L226 Difference]: Without dead ends: 2829 [2021-11-23 12:51:24,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1161, Invalid=5001, Unknown=0, NotChecked=0, Total=6162 [2021-11-23 12:51:24,813 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 711 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 12:51:24,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 1218 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1651 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 12:51:24,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2021-11-23 12:51:24,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 2394. [2021-11-23 12:51:24,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2394 states, 2392 states have (on average 1.144648829431438) internal successors, (2738), 2393 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:51:24,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 2738 transitions. [2021-11-23 12:51:24,852 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 2738 transitions. Word has length 88 [2021-11-23 12:51:24,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:51:24,852 INFO L470 AbstractCegarLoop]: Abstraction has 2394 states and 2738 transitions. [2021-11-23 12:51:24,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.58) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:51:24,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 2738 transitions. [2021-11-23 12:51:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 12:51:24,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:51:24,856 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:51:24,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-23 12:51:25,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:51:25,070 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:51:25,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:51:25,070 INFO L85 PathProgramCache]: Analyzing trace with hash 303608411, now seen corresponding path program 10 times [2021-11-23 12:51:25,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:51:25,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480175322] [2021-11-23 12:51:25,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:51:25,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:51:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:51:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 28 proven. 170 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:51:25,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:51:25,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480175322] [2021-11-23 12:51:25,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480175322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:51:25,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591373228] [2021-11-23 12:51:25,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:51:25,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:51:25,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:51:25,426 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:51:25,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-23 12:51:25,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:51:25,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:51:25,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-23 12:51:25,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:51:25,549 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:51:25,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:51:26,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 12:51:26,365 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-23 12:51:26,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-11-23 12:51:27,804 INFO L354 Elim1Store]: treesize reduction 45, result has 18.2 percent of original size [2021-11-23 12:51:27,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2021-11-23 12:51:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 50 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:51:28,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:51:30,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 63 [2021-11-23 12:51:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 66 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:51:32,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591373228] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:51:32,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:51:32,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 26] total 68 [2021-11-23 12:51:32,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562328660] [2021-11-23 12:51:32,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:51:32,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-23 12:51:32,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:51:32,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-23 12:51:32,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=4256, Unknown=1, NotChecked=0, Total=4692 [2021-11-23 12:51:32,626 INFO L87 Difference]: Start difference. First operand 2394 states and 2738 transitions. Second operand has 69 states, 68 states have (on average 3.8088235294117645) internal successors, (259), 69 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:51:37,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:51:37,101 INFO L93 Difference]: Finished difference Result 2699 states and 3076 transitions. [2021-11-23 12:51:37,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-23 12:51:37,101 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 3.8088235294117645) internal successors, (259), 69 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-23 12:51:37,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:51:37,107 INFO L225 Difference]: With dead ends: 2699 [2021-11-23 12:51:37,107 INFO L226 Difference]: Without dead ends: 2699 [2021-11-23 12:51:37,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 134 SyntacticMatches, 4 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2934 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1512, Invalid=12529, Unknown=1, NotChecked=0, Total=14042 [2021-11-23 12:51:37,109 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 490 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 12:51:37,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 1899 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1392 Invalid, 0 Unknown, 403 Unchecked, 0.8s Time] [2021-11-23 12:51:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2021-11-23 12:51:37,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2640. [2021-11-23 12:51:37,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2638 states have (on average 1.1455648218347232) internal successors, (3022), 2639 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:51:37,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 3022 transitions. [2021-11-23 12:51:37,143 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 3022 transitions. Word has length 89 [2021-11-23 12:51:37,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:51:37,143 INFO L470 AbstractCegarLoop]: Abstraction has 2640 states and 3022 transitions. [2021-11-23 12:51:37,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 3.8088235294117645) internal successors, (259), 69 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:51:37,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 3022 transitions. [2021-11-23 12:51:37,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 12:51:37,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:51:37,146 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:51:37,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-23 12:51:37,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-23 12:51:37,354 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:51:37,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:51:37,354 INFO L85 PathProgramCache]: Analyzing trace with hash -2114784281, now seen corresponding path program 14 times [2021-11-23 12:51:37,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:51:37,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151631302] [2021-11-23 12:51:37,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:51:37,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:51:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:51:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 26 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:51:37,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:51:37,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151631302] [2021-11-23 12:51:37,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151631302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:51:37,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729778042] [2021-11-23 12:51:37,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:51:37,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:51:37,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:51:37,818 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:51:37,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-23 12:51:37,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:51:37,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:51:37,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-23 12:51:37,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:51:38,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 12:51:39,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:51:39,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-23 12:51:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 91 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:51:40,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:51:41,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-23 12:51:41,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-11-23 12:51:41,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-11-23 12:51:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 91 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:51:41,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729778042] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:51:41,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:51:41,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 72 [2021-11-23 12:51:41,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511431225] [2021-11-23 12:51:41,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:51:41,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-23 12:51:41,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:51:41,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-23 12:51:41,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=4785, Unknown=0, NotChecked=0, Total=5112 [2021-11-23 12:51:41,733 INFO L87 Difference]: Start difference. First operand 2640 states and 3022 transitions. Second operand has 72 states, 72 states have (on average 3.25) internal successors, (234), 72 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:51:45,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:51:45,982 INFO L93 Difference]: Finished difference Result 3718 states and 4193 transitions. [2021-11-23 12:51:45,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-23 12:51:45,982 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.25) internal successors, (234), 72 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-23 12:51:45,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:51:45,986 INFO L225 Difference]: With dead ends: 3718 [2021-11-23 12:51:45,986 INFO L226 Difference]: Without dead ends: 3644 [2021-11-23 12:51:45,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3107 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=865, Invalid=12245, Unknown=0, NotChecked=0, Total=13110 [2021-11-23 12:51:45,987 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 627 mSDsluCounter, 4060 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 4212 SdHoareTripleChecker+Invalid, 4042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1470 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:51:45,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 4212 Invalid, 4042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2545 Invalid, 0 Unknown, 1470 Unchecked, 1.1s Time] [2021-11-23 12:51:45,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2021-11-23 12:51:46,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 2994. [2021-11-23 12:51:46,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2992 states have (on average 1.1463903743315509) internal successors, (3430), 2993 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:51:46,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 3430 transitions. [2021-11-23 12:51:46,032 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 3430 transitions. Word has length 93 [2021-11-23 12:51:46,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:51:46,032 INFO L470 AbstractCegarLoop]: Abstraction has 2994 states and 3430 transitions. [2021-11-23 12:51:46,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.25) internal successors, (234), 72 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:51:46,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 3430 transitions. [2021-11-23 12:51:46,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 12:51:46,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:51:46,037 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:51:46,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-23 12:51:46,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-23 12:51:46,250 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:51:46,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:51:46,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1245128407, now seen corresponding path program 11 times [2021-11-23 12:51:46,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:51:46,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520967853] [2021-11-23 12:51:46,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:51:46,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:51:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:51:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 12:51:47,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:51:47,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520967853] [2021-11-23 12:51:47,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520967853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:51:47,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766096427] [2021-11-23 12:51:47,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:51:47,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:51:47,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:51:47,034 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:51:47,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-23 12:51:47,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-23 12:51:47,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:51:47,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 134 conjunts are in the unsatisfiable core [2021-11-23 12:51:47,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:51:47,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 12:51:47,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 12:51:47,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2021-11-23 12:51:52,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:51:52,976 INFO L354 Elim1Store]: treesize reduction 59, result has 18.1 percent of original size [2021-11-23 12:51:52,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 45 [2021-11-23 12:51:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 45 proven. 195 refuted. 8 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 12:51:53,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:51:55,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:51:55,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-11-23 12:51:55,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-23 12:51:55,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:51:55,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 54 [2021-11-23 12:51:55,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:51:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 45 proven. 203 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 12:51:56,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766096427] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:51:56,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:51:56,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 29] total 88 [2021-11-23 12:51:56,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106822490] [2021-11-23 12:51:56,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:51:56,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-23 12:51:56,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:51:56,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-23 12:51:56,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=7195, Unknown=1, NotChecked=0, Total=7656 [2021-11-23 12:51:56,822 INFO L87 Difference]: Start difference. First operand 2994 states and 3430 transitions. Second operand has 88 states, 88 states have (on average 3.215909090909091) internal successors, (283), 88 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:52:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:52:43,894 INFO L93 Difference]: Finished difference Result 7440 states and 8484 transitions. [2021-11-23 12:52:43,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2021-11-23 12:52:43,895 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.215909090909091) internal successors, (283), 88 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-23 12:52:43,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:52:43,907 INFO L225 Difference]: With dead ends: 7440 [2021-11-23 12:52:43,907 INFO L226 Difference]: Without dead ends: 7381 [2021-11-23 12:52:43,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22494 ImplicationChecksByTransitivity, 51.7s TimeCoverageRelationStatistics Valid=5062, Invalid=69193, Unknown=1, NotChecked=0, Total=74256 [2021-11-23 12:52:43,913 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 1004 mSDsluCounter, 6287 mSDsCounter, 0 mSdLazyCounter, 5226 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 6454 SdHoareTripleChecker+Invalid, 6524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 5226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1199 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:52:43,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 6454 Invalid, 6524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 5226 Invalid, 0 Unknown, 1199 Unchecked, 2.6s Time] [2021-11-23 12:52:43,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7381 states. [2021-11-23 12:52:43,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7381 to 4389. [2021-11-23 12:52:43,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4389 states, 4387 states have (on average 1.1483929792568954) internal successors, (5038), 4388 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:52:43,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4389 states to 4389 states and 5038 transitions. [2021-11-23 12:52:43,999 INFO L78 Accepts]: Start accepts. Automaton has 4389 states and 5038 transitions. Word has length 101 [2021-11-23 12:52:43,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:52:43,999 INFO L470 AbstractCegarLoop]: Abstraction has 4389 states and 5038 transitions. [2021-11-23 12:52:44,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.215909090909091) internal successors, (283), 88 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:52:44,000 INFO L276 IsEmpty]: Start isEmpty. Operand 4389 states and 5038 transitions. [2021-11-23 12:52:44,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 12:52:44,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:52:44,005 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:52:44,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-23 12:52:44,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:52:44,226 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:52:44,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:52:44,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1402500025, now seen corresponding path program 15 times [2021-11-23 12:52:44,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:52:44,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282901084] [2021-11-23 12:52:44,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:52:44,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:52:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:52:44,886 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 29 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:52:44,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:52:44,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282901084] [2021-11-23 12:52:44,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282901084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:52:44,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945965043] [2021-11-23 12:52:44,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:52:44,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:52:44,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:52:44,888 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:52:44,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-23 12:52:45,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 12:52:45,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:52:45,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 148 conjunts are in the unsatisfiable core [2021-11-23 12:52:45,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:52:45,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 12:52:45,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 12:52:46,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-23 12:52:47,910 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-11-23 12:52:47,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 23 [2021-11-23 12:52:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 29 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:52:47,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:52:48,817 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0) (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 9)) 0)) is different from false [2021-11-23 12:52:48,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:52:48,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-11-23 12:52:48,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:52:48,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2021-11-23 12:52:48,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 4 [2021-11-23 12:52:48,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:52:48,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2021-11-23 12:52:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 29 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:52:49,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945965043] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:52:49,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:52:49,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34, 30] total 77 [2021-11-23 12:52:49,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27366708] [2021-11-23 12:52:49,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:52:49,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-23 12:52:49,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:52:49,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-23 12:52:49,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=5455, Unknown=1, NotChecked=148, Total=5852 [2021-11-23 12:52:49,645 INFO L87 Difference]: Start difference. First operand 4389 states and 5038 transitions. Second operand has 77 states, 77 states have (on average 3.1818181818181817) internal successors, (245), 77 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:52:53,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:52:53,093 INFO L93 Difference]: Finished difference Result 6985 states and 8000 transitions. [2021-11-23 12:52:53,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-23 12:52:53,094 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.1818181818181817) internal successors, (245), 77 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-23 12:52:53,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:52:53,109 INFO L225 Difference]: With dead ends: 6985 [2021-11-23 12:52:53,109 INFO L226 Difference]: Without dead ends: 6847 [2021-11-23 12:52:53,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3451 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=681, Invalid=13602, Unknown=1, NotChecked=236, Total=14520 [2021-11-23 12:52:53,111 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 508 mSDsluCounter, 5790 mSDsCounter, 0 mSdLazyCounter, 2887 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 5949 SdHoareTripleChecker+Invalid, 4991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2040 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:52:53,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 5949 Invalid, 4991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2887 Invalid, 0 Unknown, 2040 Unchecked, 1.3s Time] [2021-11-23 12:52:53,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6847 states. [2021-11-23 12:52:53,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6847 to 4498. [2021-11-23 12:52:53,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4498 states, 4496 states have (on average 1.147909252669039) internal successors, (5161), 4497 states have internal predecessors, (5161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:52:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4498 states to 4498 states and 5161 transitions. [2021-11-23 12:52:53,227 INFO L78 Accepts]: Start accepts. Automaton has 4498 states and 5161 transitions. Word has length 102 [2021-11-23 12:52:53,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:52:53,227 INFO L470 AbstractCegarLoop]: Abstraction has 4498 states and 5161 transitions. [2021-11-23 12:52:53,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.1818181818181817) internal successors, (245), 77 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:52:53,228 INFO L276 IsEmpty]: Start isEmpty. Operand 4498 states and 5161 transitions. [2021-11-23 12:52:53,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 12:52:53,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:52:53,234 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:52:53,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-23 12:52:53,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:52:53,450 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:52:53,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:52:53,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1330470007, now seen corresponding path program 6 times [2021-11-23 12:52:53,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:52:53,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014484597] [2021-11-23 12:52:53,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:52:53,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:52:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:52:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 29 proven. 336 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:52:53,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:52:53,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014484597] [2021-11-23 12:52:53,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014484597] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:52:53,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730378001] [2021-11-23 12:52:53,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:52:53,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:52:53,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:52:53,946 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:52:53,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-23 12:52:54,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-23 12:52:54,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:52:54,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-23 12:52:54,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:52:54,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:52:54,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:52:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 29 proven. 336 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:52:54,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:52:55,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:52:55,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 12:52:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 29 proven. 336 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:52:55,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730378001] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:52:55,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:52:55,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 48 [2021-11-23 12:52:55,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057022722] [2021-11-23 12:52:55,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:52:55,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 12:52:55,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:52:55,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 12:52:55,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2113, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 12:52:55,252 INFO L87 Difference]: Start difference. First operand 4498 states and 5161 transitions. Second operand has 48 states, 48 states have (on average 3.625) internal successors, (174), 48 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:52:57,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:52:57,246 INFO L93 Difference]: Finished difference Result 6145 states and 6974 transitions. [2021-11-23 12:52:57,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-23 12:52:57,254 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.625) internal successors, (174), 48 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-23 12:52:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:52:57,262 INFO L225 Difference]: With dead ends: 6145 [2021-11-23 12:52:57,262 INFO L226 Difference]: Without dead ends: 5535 [2021-11-23 12:52:57,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=523, Invalid=4733, Unknown=0, NotChecked=0, Total=5256 [2021-11-23 12:52:57,264 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 619 mSDsluCounter, 3300 mSDsCounter, 0 mSdLazyCounter, 2733 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 3448 SdHoareTripleChecker+Invalid, 2889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:52:57,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 3448 Invalid, 2889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2733 Invalid, 0 Unknown, 91 Unchecked, 1.1s Time] [2021-11-23 12:52:57,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2021-11-23 12:52:57,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 5004. [2021-11-23 12:52:57,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5004 states, 5002 states have (on average 1.1493402638944423) internal successors, (5749), 5003 states have internal predecessors, (5749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:52:57,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5004 states to 5004 states and 5749 transitions. [2021-11-23 12:52:57,333 INFO L78 Accepts]: Start accepts. Automaton has 5004 states and 5749 transitions. Word has length 105 [2021-11-23 12:52:57,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:52:57,333 INFO L470 AbstractCegarLoop]: Abstraction has 5004 states and 5749 transitions. [2021-11-23 12:52:57,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.625) internal successors, (174), 48 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:52:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 5004 states and 5749 transitions. [2021-11-23 12:52:57,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 12:52:57,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:52:57,340 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:52:57,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-23 12:52:57,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-23 12:52:57,562 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:52:57,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:52:57,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1831533212, now seen corresponding path program 16 times [2021-11-23 12:52:57,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:52:57,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009836705] [2021-11-23 12:52:57,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:52:57,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:52:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:52:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 120 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:52:58,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:52:58,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009836705] [2021-11-23 12:52:58,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009836705] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:52:58,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893616764] [2021-11-23 12:52:58,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:52:58,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:52:58,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:52:58,237 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:52:58,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-23 12:52:58,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:52:58,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:52:58,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 118 conjunts are in the unsatisfiable core [2021-11-23 12:52:58,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:52:58,329 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:52:58,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:52:58,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 12:52:59,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:52:59,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-23 12:52:59,894 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 162 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:52:59,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:53:01,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-23 12:53:01,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-23 12:53:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 190 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:03,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893616764] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:53:03,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:53:03,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31, 31] total 78 [2021-11-23 12:53:03,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19598457] [2021-11-23 12:53:03,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:53:03,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-23 12:53:03,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:53:03,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-23 12:53:03,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=5563, Unknown=0, NotChecked=0, Total=6162 [2021-11-23 12:53:03,413 INFO L87 Difference]: Start difference. First operand 5004 states and 5749 transitions. Second operand has 79 states, 78 states have (on average 3.5384615384615383) internal successors, (276), 79 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:12,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:53:12,854 INFO L93 Difference]: Finished difference Result 7326 states and 8305 transitions. [2021-11-23 12:53:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-23 12:53:12,854 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 3.5384615384615383) internal successors, (276), 79 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-23 12:53:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:53:12,860 INFO L225 Difference]: With dead ends: 7326 [2021-11-23 12:53:12,860 INFO L226 Difference]: Without dead ends: 7326 [2021-11-23 12:53:12,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5364 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=5036, Invalid=24034, Unknown=0, NotChecked=0, Total=29070 [2021-11-23 12:53:12,862 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 1808 mSDsluCounter, 3257 mSDsCounter, 0 mSdLazyCounter, 3843 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1808 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 4830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 3843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:53:12,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1808 Valid, 3364 Invalid, 4830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 3843 Invalid, 0 Unknown, 296 Unchecked, 2.5s Time] [2021-11-23 12:53:12,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7326 states. [2021-11-23 12:53:12,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7326 to 5913. [2021-11-23 12:53:12,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5913 states, 5911 states have (on average 1.1563187277956353) internal successors, (6835), 5912 states have internal predecessors, (6835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:12,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5913 states to 5913 states and 6835 transitions. [2021-11-23 12:53:12,930 INFO L78 Accepts]: Start accepts. Automaton has 5913 states and 6835 transitions. Word has length 106 [2021-11-23 12:53:12,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:53:12,930 INFO L470 AbstractCegarLoop]: Abstraction has 5913 states and 6835 transitions. [2021-11-23 12:53:12,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 3.5384615384615383) internal successors, (276), 79 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:12,931 INFO L276 IsEmpty]: Start isEmpty. Operand 5913 states and 6835 transitions. [2021-11-23 12:53:12,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 12:53:12,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:53:12,939 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:53:12,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-23 12:53:13,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:53:13,166 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:53:13,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:53:13,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1106575132, now seen corresponding path program 3 times [2021-11-23 12:53:13,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:53:13,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483883811] [2021-11-23 12:53:13,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:13,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:53:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 14 proven. 265 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 12:53:13,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:53:13,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483883811] [2021-11-23 12:53:13,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483883811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:53:13,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114190881] [2021-11-23 12:53:13,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:53:13,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:53:13,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:53:13,757 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:53:13,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-23 12:53:13,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 12:53:13,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:53:13,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-23 12:53:13,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:53:13,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 12:53:14,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:53:14,476 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-23 12:53:14,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-23 12:53:16,608 INFO L354 Elim1Store]: treesize reduction 55, result has 36.8 percent of original size [2021-11-23 12:53:16,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 54 [2021-11-23 12:53:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 14 proven. 267 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 12:53:16,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:53:23,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:53:23,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 12:53:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 14 proven. 267 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 12:53:24,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114190881] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:53:24,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:53:24,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 61 [2021-11-23 12:53:24,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93304579] [2021-11-23 12:53:24,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:53:24,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-23 12:53:24,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:53:24,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-23 12:53:24,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3471, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 12:53:24,462 INFO L87 Difference]: Start difference. First operand 5913 states and 6835 transitions. Second operand has 61 states, 61 states have (on average 3.9344262295081966) internal successors, (240), 61 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:26,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:53:26,304 INFO L93 Difference]: Finished difference Result 9204 states and 10592 transitions. [2021-11-23 12:53:26,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-23 12:53:26,304 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.9344262295081966) internal successors, (240), 61 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-23 12:53:26,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:53:26,311 INFO L225 Difference]: With dead ends: 9204 [2021-11-23 12:53:26,311 INFO L226 Difference]: Without dead ends: 7150 [2021-11-23 12:53:26,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 173 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=358, Invalid=6614, Unknown=0, NotChecked=0, Total=6972 [2021-11-23 12:53:26,312 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 322 mSDsluCounter, 5700 mSDsCounter, 0 mSdLazyCounter, 1587 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 5883 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 757 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 12:53:26,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 5883 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1587 Invalid, 0 Unknown, 757 Unchecked, 0.7s Time] [2021-11-23 12:53:26,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7150 states. [2021-11-23 12:53:26,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7150 to 4387. [2021-11-23 12:53:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4387 states, 4385 states have (on average 1.1543899657924743) internal successors, (5062), 4386 states have internal predecessors, (5062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:26,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4387 states to 4387 states and 5062 transitions. [2021-11-23 12:53:26,394 INFO L78 Accepts]: Start accepts. Automaton has 4387 states and 5062 transitions. Word has length 106 [2021-11-23 12:53:26,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:53:26,394 INFO L470 AbstractCegarLoop]: Abstraction has 4387 states and 5062 transitions. [2021-11-23 12:53:26,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.9344262295081966) internal successors, (240), 61 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:26,394 INFO L276 IsEmpty]: Start isEmpty. Operand 4387 states and 5062 transitions. [2021-11-23 12:53:26,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-23 12:53:26,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:53:26,399 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:53:26,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-23 12:53:26,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:53:26,599 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:53:26,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:53:26,600 INFO L85 PathProgramCache]: Analyzing trace with hash 415957306, now seen corresponding path program 7 times [2021-11-23 12:53:26,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:53:26,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258654773] [2021-11-23 12:53:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:26,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:53:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 91 proven. 307 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:53:27,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:53:27,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258654773] [2021-11-23 12:53:27,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258654773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:53:27,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366277160] [2021-11-23 12:53:27,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:53:27,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:53:27,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:53:27,238 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:53:27,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-23 12:53:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:27,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-23 12:53:27,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:53:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 120 proven. 278 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:53:27,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:53:28,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 12:53:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 120 proven. 278 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:53:28,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366277160] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:53:28,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:53:28,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 54 [2021-11-23 12:53:28,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305348328] [2021-11-23 12:53:28,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:53:28,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-23 12:53:28,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:53:28,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-23 12:53:28,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=2661, Unknown=0, NotChecked=0, Total=2970 [2021-11-23 12:53:28,852 INFO L87 Difference]: Start difference. First operand 4387 states and 5062 transitions. Second operand has 55 states, 54 states have (on average 4.12962962962963) internal successors, (223), 55 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:31,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:53:31,004 INFO L93 Difference]: Finished difference Result 5686 states and 6433 transitions. [2021-11-23 12:53:31,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-23 12:53:31,004 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 4.12962962962963) internal successors, (223), 55 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-23 12:53:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:53:31,010 INFO L225 Difference]: With dead ends: 5686 [2021-11-23 12:53:31,010 INFO L226 Difference]: Without dead ends: 5686 [2021-11-23 12:53:31,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1377, Invalid=5933, Unknown=0, NotChecked=0, Total=7310 [2021-11-23 12:53:31,011 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 541 mSDsluCounter, 1686 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 1762 SdHoareTripleChecker+Invalid, 2467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:53:31,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 1762 Invalid, 2467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2422 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 12:53:31,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-11-23 12:53:31,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 4442. [2021-11-23 12:53:31,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4442 states, 4440 states have (on average 1.154954954954955) internal successors, (5128), 4441 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:31,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4442 states to 4442 states and 5128 transitions. [2021-11-23 12:53:31,070 INFO L78 Accepts]: Start accepts. Automaton has 4442 states and 5128 transitions. Word has length 109 [2021-11-23 12:53:31,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:53:31,070 INFO L470 AbstractCegarLoop]: Abstraction has 4442 states and 5128 transitions. [2021-11-23 12:53:31,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 4.12962962962963) internal successors, (223), 55 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:31,070 INFO L276 IsEmpty]: Start isEmpty. Operand 4442 states and 5128 transitions. [2021-11-23 12:53:31,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-23 12:53:31,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:53:31,074 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:53:31,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-23 12:53:31,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:53:31,275 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:53:31,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:53:31,275 INFO L85 PathProgramCache]: Analyzing trace with hash -196905228, now seen corresponding path program 12 times [2021-11-23 12:53:31,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:53:31,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369896522] [2021-11-23 12:53:31,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:31,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:53:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 16 proven. 315 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:53:32,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:53:32,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369896522] [2021-11-23 12:53:32,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369896522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:53:32,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147758516] [2021-11-23 12:53:32,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:53:32,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:53:32,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:53:32,041 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:53:32,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-23 12:53:32,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-23 12:53:32,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:53:32,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 159 conjunts are in the unsatisfiable core [2021-11-23 12:53:32,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:53:32,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 12:53:32,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 12:53:33,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 12:53:33,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:53:33,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-23 12:53:34,985 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 12:53:34,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 48 [2021-11-23 12:53:37,136 INFO L354 Elim1Store]: treesize reduction 112, result has 10.4 percent of original size [2021-11-23 12:53:37,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 50 [2021-11-23 12:53:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 16 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:37,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:53:39,283 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-11-23 12:53:39,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 182 [2021-11-23 12:53:39,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:53:39,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 176 [2021-11-23 12:53:39,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:53:39,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-23 12:53:39,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:53:39,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 147 treesize of output 236 [2021-11-23 12:53:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 19 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:45,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147758516] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:53:45,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:53:45,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 40, 37] total 98 [2021-11-23 12:53:45,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933937921] [2021-11-23 12:53:45,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:53:45,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-23 12:53:45,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:53:45,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-23 12:53:45,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=9133, Unknown=0, NotChecked=0, Total=9506 [2021-11-23 12:53:45,851 INFO L87 Difference]: Start difference. First operand 4442 states and 5128 transitions. Second operand has 98 states, 98 states have (on average 3.0510204081632653) internal successors, (299), 98 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:05,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:05,017 INFO L93 Difference]: Finished difference Result 9457 states and 10949 transitions. [2021-11-23 12:54:05,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-23 12:54:05,018 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.0510204081632653) internal successors, (299), 98 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-23 12:54:05,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:05,024 INFO L225 Difference]: With dead ends: 9457 [2021-11-23 12:54:05,024 INFO L226 Difference]: Without dead ends: 9390 [2021-11-23 12:54:05,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9113 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=2679, Invalid=37923, Unknown=0, NotChecked=0, Total=40602 [2021-11-23 12:54:05,026 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 1846 mSDsluCounter, 6396 mSDsCounter, 0 mSdLazyCounter, 7461 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1846 SdHoareTripleChecker+Valid, 6533 SdHoareTripleChecker+Invalid, 11698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 7461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3878 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:05,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1846 Valid, 6533 Invalid, 11698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 7461 Invalid, 0 Unknown, 3878 Unchecked, 4.1s Time] [2021-11-23 12:54:05,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9390 states. [2021-11-23 12:54:05,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9390 to 6925. [2021-11-23 12:54:05,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6925 states, 6923 states have (on average 1.1588906543406037) internal successors, (8023), 6924 states have internal predecessors, (8023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:05,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6925 states to 6925 states and 8023 transitions. [2021-11-23 12:54:05,102 INFO L78 Accepts]: Start accepts. Automaton has 6925 states and 8023 transitions. Word has length 109 [2021-11-23 12:54:05,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:05,102 INFO L470 AbstractCegarLoop]: Abstraction has 6925 states and 8023 transitions. [2021-11-23 12:54:05,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.0510204081632653) internal successors, (299), 98 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:05,102 INFO L276 IsEmpty]: Start isEmpty. Operand 6925 states and 8023 transitions. [2021-11-23 12:54:05,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-23 12:54:05,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:05,107 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:05,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:05,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:05,308 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:54:05,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:05,308 INFO L85 PathProgramCache]: Analyzing trace with hash -846590015, now seen corresponding path program 4 times [2021-11-23 12:54:05,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:05,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882478207] [2021-11-23 12:54:05,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:05,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 45 proven. 258 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 12:54:05,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:05,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882478207] [2021-11-23 12:54:05,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882478207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:05,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379761787] [2021-11-23 12:54:05,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:54:05,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:05,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:05,677 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:05,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-23 12:54:05,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:54:05,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:54:05,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-23 12:54:05,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:05,838 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:54:05,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:54:05,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 12:54:06,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 12:54:06,728 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-23 12:54:06,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-23 12:54:08,372 INFO L354 Elim1Store]: treesize reduction 45, result has 18.2 percent of original size [2021-11-23 12:54:08,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 12:54:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 73 proven. 231 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 12:54:08,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:11,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 63 [2021-11-23 12:54:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 91 proven. 213 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 12:54:12,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379761787] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:12,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:12,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25, 25] total 68 [2021-11-23 12:54:12,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370039241] [2021-11-23 12:54:12,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:12,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-23 12:54:12,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:12,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-23 12:54:12,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=4230, Unknown=1, NotChecked=0, Total=4692 [2021-11-23 12:54:12,763 INFO L87 Difference]: Start difference. First operand 6925 states and 8023 transitions. Second operand has 69 states, 68 states have (on average 4.411764705882353) internal successors, (300), 69 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:19,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:19,854 INFO L93 Difference]: Finished difference Result 9107 states and 10538 transitions. [2021-11-23 12:54:19,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-23 12:54:19,855 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 4.411764705882353) internal successors, (300), 69 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-23 12:54:19,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:19,861 INFO L225 Difference]: With dead ends: 9107 [2021-11-23 12:54:19,861 INFO L226 Difference]: Without dead ends: 9107 [2021-11-23 12:54:19,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3100 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=2430, Invalid=15125, Unknown=1, NotChecked=0, Total=17556 [2021-11-23 12:54:19,862 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 641 mSDsluCounter, 3943 mSDsCounter, 0 mSdLazyCounter, 2328 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 4092 SdHoareTripleChecker+Invalid, 4523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2166 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:19,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 4092 Invalid, 4523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2328 Invalid, 0 Unknown, 2166 Unchecked, 1.1s Time] [2021-11-23 12:54:19,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9107 states. [2021-11-23 12:54:19,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9107 to 7519. [2021-11-23 12:54:19,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7519 states, 7517 states have (on average 1.1593720899294933) internal successors, (8715), 7518 states have internal predecessors, (8715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7519 states to 7519 states and 8715 transitions. [2021-11-23 12:54:20,009 INFO L78 Accepts]: Start accepts. Automaton has 7519 states and 8715 transitions. Word has length 110 [2021-11-23 12:54:20,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:20,009 INFO L470 AbstractCegarLoop]: Abstraction has 7519 states and 8715 transitions. [2021-11-23 12:54:20,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 4.411764705882353) internal successors, (300), 69 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:20,009 INFO L276 IsEmpty]: Start isEmpty. Operand 7519 states and 8715 transitions. [2021-11-23 12:54:20,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 12:54:20,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:20,014 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:20,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:20,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-23 12:54:20,215 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:54:20,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:20,215 INFO L85 PathProgramCache]: Analyzing trace with hash -964080841, now seen corresponding path program 8 times [2021-11-23 12:54:20,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:20,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104392134] [2021-11-23 12:54:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:20,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 32 proven. 418 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:54:20,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:20,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104392134] [2021-11-23 12:54:20,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104392134] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:20,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327415190] [2021-11-23 12:54:20,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:54:20,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:20,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:20,726 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:20,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-23 12:54:20,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:54:20,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:54:20,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-23 12:54:20,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:21,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 12:54:23,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:54:23,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-23 12:54:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 120 proven. 330 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:54:23,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:25,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-23 12:54:25,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-11-23 12:54:25,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-11-23 12:54:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 120 proven. 330 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:54:25,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327415190] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:25,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:25,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 77 [2021-11-23 12:54:25,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632085155] [2021-11-23 12:54:25,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:25,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-23 12:54:25,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:25,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-23 12:54:25,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=5483, Unknown=0, NotChecked=0, Total=5852 [2021-11-23 12:54:25,503 INFO L87 Difference]: Start difference. First operand 7519 states and 8715 transitions. Second operand has 77 states, 77 states have (on average 3.675324675324675) internal successors, (283), 77 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:35,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:35,690 INFO L93 Difference]: Finished difference Result 8970 states and 10199 transitions. [2021-11-23 12:54:35,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-23 12:54:35,690 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.675324675324675) internal successors, (283), 77 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-23 12:54:35,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:35,696 INFO L225 Difference]: With dead ends: 8970 [2021-11-23 12:54:35,696 INFO L226 Difference]: Without dead ends: 8200 [2021-11-23 12:54:35,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4693 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1270, Invalid=17636, Unknown=0, NotChecked=0, Total=18906 [2021-11-23 12:54:35,697 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 651 mSDsluCounter, 5965 mSDsCounter, 0 mSdLazyCounter, 3274 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 6153 SdHoareTripleChecker+Invalid, 4186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 881 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:35,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 6153 Invalid, 4186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3274 Invalid, 0 Unknown, 881 Unchecked, 1.5s Time] [2021-11-23 12:54:35,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8200 states. [2021-11-23 12:54:35,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8200 to 6837. [2021-11-23 12:54:35,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6837 states, 6835 states have (on average 1.1531821506949524) internal successors, (7882), 6836 states have internal predecessors, (7882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:35,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6837 states to 6837 states and 7882 transitions. [2021-11-23 12:54:35,782 INFO L78 Accepts]: Start accepts. Automaton has 6837 states and 7882 transitions. Word has length 114 [2021-11-23 12:54:35,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:35,782 INFO L470 AbstractCegarLoop]: Abstraction has 6837 states and 7882 transitions. [2021-11-23 12:54:35,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.675324675324675) internal successors, (283), 77 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:35,783 INFO L276 IsEmpty]: Start isEmpty. Operand 6837 states and 7882 transitions. [2021-11-23 12:54:35,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 12:54:35,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:35,787 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:35,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-23 12:54:35,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-23 12:54:35,988 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:54:35,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:35,988 INFO L85 PathProgramCache]: Analyzing trace with hash 920981252, now seen corresponding path program 17 times [2021-11-23 12:54:35,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:35,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098896488] [2021-11-23 12:54:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:35,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 322 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:36,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:36,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098896488] [2021-11-23 12:54:36,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098896488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:36,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895173670] [2021-11-23 12:54:36,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:54:36,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:36,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:36,505 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:36,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-23 12:54:36,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-23 12:54:36,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:54:36,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-23 12:54:36,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:36,659 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:54:36,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:54:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 333 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:37,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 332 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:38,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895173670] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:38,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:38,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 72 [2021-11-23 12:54:38,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84257287] [2021-11-23 12:54:38,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:38,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-23 12:54:38,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:38,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-23 12:54:38,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=819, Invalid=4293, Unknown=0, NotChecked=0, Total=5112 [2021-11-23 12:54:38,399 INFO L87 Difference]: Start difference. First operand 6837 states and 7882 transitions. Second operand has 72 states, 72 states have (on average 3.736111111111111) internal successors, (269), 72 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:44,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:44,458 INFO L93 Difference]: Finished difference Result 12296 states and 13775 transitions. [2021-11-23 12:54:44,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-11-23 12:54:44,458 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.736111111111111) internal successors, (269), 72 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-23 12:54:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:44,466 INFO L225 Difference]: With dead ends: 12296 [2021-11-23 12:54:44,466 INFO L226 Difference]: Without dead ends: 12217 [2021-11-23 12:54:44,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16561 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=11115, Invalid=41097, Unknown=0, NotChecked=0, Total=52212 [2021-11-23 12:54:44,469 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 934 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 2180 SdHoareTripleChecker+Invalid, 2454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:44,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 2180 Invalid, 2454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 12:54:44,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12217 states. [2021-11-23 12:54:44,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12217 to 8873. [2021-11-23 12:54:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8873 states, 8871 states have (on average 1.164693946567467) internal successors, (10332), 8872 states have internal predecessors, (10332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:44,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8873 states to 8873 states and 10332 transitions. [2021-11-23 12:54:44,558 INFO L78 Accepts]: Start accepts. Automaton has 8873 states and 10332 transitions. Word has length 116 [2021-11-23 12:54:44,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:44,558 INFO L470 AbstractCegarLoop]: Abstraction has 8873 states and 10332 transitions. [2021-11-23 12:54:44,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.736111111111111) internal successors, (269), 72 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:44,558 INFO L276 IsEmpty]: Start isEmpty. Operand 8873 states and 10332 transitions. [2021-11-23 12:54:44,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 12:54:44,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:44,564 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 11, 6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:44,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:44,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-23 12:54:44,765 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:54:44,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:44,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1763231455, now seen corresponding path program 9 times [2021-11-23 12:54:44,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:44,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345077039] [2021-11-23 12:54:44,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:44,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 38 proven. 369 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 12:54:45,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:45,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345077039] [2021-11-23 12:54:45,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345077039] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:45,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963581855] [2021-11-23 12:54:45,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:54:45,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:45,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:45,250 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:45,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-23 12:54:45,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 12:54:45,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:54:45,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-23 12:54:45,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:45,788 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 [2021-11-23 12:54:46,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:54:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 38 proven. 369 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 12:54:46,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:46,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:54:46,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 12:54:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 38 proven. 369 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 12:54:46,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963581855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:46,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:46,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 42 [2021-11-23 12:54:46,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779005848] [2021-11-23 12:54:46,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:46,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-23 12:54:46,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:46,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-23 12:54:46,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1595, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 12:54:46,796 INFO L87 Difference]: Start difference. First operand 8873 states and 10332 transitions. Second operand has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:48,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:48,223 INFO L93 Difference]: Finished difference Result 9321 states and 10645 transitions. [2021-11-23 12:54:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 12:54:48,230 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-23 12:54:48,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:48,238 INFO L225 Difference]: With dead ends: 9321 [2021-11-23 12:54:48,239 INFO L226 Difference]: Without dead ends: 8693 [2021-11-23 12:54:48,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 218 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=421, Invalid=3611, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 12:54:48,240 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 482 mSDsluCounter, 2359 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 2470 SdHoareTripleChecker+Invalid, 2106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:48,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 2470 Invalid, 2106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1818 Invalid, 0 Unknown, 212 Unchecked, 0.8s Time] [2021-11-23 12:54:48,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8693 states. [2021-11-23 12:54:48,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8693 to 7494. [2021-11-23 12:54:48,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7494 states, 7492 states have (on average 1.1569674319273893) internal successors, (8668), 7493 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:48,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7494 states to 7494 states and 8668 transitions. [2021-11-23 12:54:48,347 INFO L78 Accepts]: Start accepts. Automaton has 7494 states and 8668 transitions. Word has length 119 [2021-11-23 12:54:48,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:48,347 INFO L470 AbstractCegarLoop]: Abstraction has 7494 states and 8668 transitions. [2021-11-23 12:54:48,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:48,348 INFO L276 IsEmpty]: Start isEmpty. Operand 7494 states and 8668 transitions. [2021-11-23 12:54:48,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-23 12:54:48,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:48,353 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:48,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:48,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:48,553 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:54:48,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:48,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1113206431, now seen corresponding path program 18 times [2021-11-23 12:54:48,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:48,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276687097] [2021-11-23 12:54:48,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:48,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 35 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:49,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:49,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276687097] [2021-11-23 12:54:49,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276687097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:49,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347495331] [2021-11-23 12:54:49,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:54:49,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:49,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:49,162 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:49,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-23 12:54:49,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-23 12:54:49,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:54:49,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 137 conjunts are in the unsatisfiable core [2021-11-23 12:54:49,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:49,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:54:50,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:54:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 35 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:50,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:50,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:54:50,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 12:54:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 35 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:50,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347495331] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:50,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:50,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 57 [2021-11-23 12:54:50,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11627764] [2021-11-23 12:54:50,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:50,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-23 12:54:50,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:50,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-23 12:54:50,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3025, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 12:54:50,682 INFO L87 Difference]: Start difference. First operand 7494 states and 8668 transitions. Second operand has 57 states, 57 states have (on average 3.280701754385965) internal successors, (187), 57 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:53,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:53,618 INFO L93 Difference]: Finished difference Result 9902 states and 11412 transitions. [2021-11-23 12:54:53,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-23 12:54:53,618 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.280701754385965) internal successors, (187), 57 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-23 12:54:53,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:53,625 INFO L225 Difference]: With dead ends: 9902 [2021-11-23 12:54:53,625 INFO L226 Difference]: Without dead ends: 9805 [2021-11-23 12:54:53,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 219 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=568, Invalid=7088, Unknown=0, NotChecked=0, Total=7656 [2021-11-23 12:54:53,626 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 748 mSDsluCounter, 5051 mSDsCounter, 0 mSdLazyCounter, 4061 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 5254 SdHoareTripleChecker+Invalid, 4542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 4061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 434 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:53,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 5254 Invalid, 4542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 4061 Invalid, 0 Unknown, 434 Unchecked, 1.7s Time] [2021-11-23 12:54:53,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9805 states. [2021-11-23 12:54:53,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9805 to 8018. [2021-11-23 12:54:53,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8018 states, 8016 states have (on average 1.157684630738523) internal successors, (9280), 8017 states have internal predecessors, (9280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:53,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8018 states to 8018 states and 9280 transitions. [2021-11-23 12:54:53,734 INFO L78 Accepts]: Start accepts. Automaton has 8018 states and 9280 transitions. Word has length 120 [2021-11-23 12:54:53,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:53,735 INFO L470 AbstractCegarLoop]: Abstraction has 8018 states and 9280 transitions. [2021-11-23 12:54:53,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.280701754385965) internal successors, (187), 57 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:53,735 INFO L276 IsEmpty]: Start isEmpty. Operand 8018 states and 9280 transitions. [2021-11-23 12:54:53,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-23 12:54:53,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:53,743 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:53,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:53,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-11-23 12:54:53,946 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:54:53,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:53,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1939361278, now seen corresponding path program 13 times [2021-11-23 12:54:53,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:53,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640711600] [2021-11-23 12:54:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:53,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 18 proven. 408 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:54:54,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:54,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640711600] [2021-11-23 12:54:54,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640711600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:54,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744273559] [2021-11-23 12:54:54,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:54:54,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:54,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:54,976 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:54,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-23 12:54:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:55,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 157 conjunts are in the unsatisfiable core [2021-11-23 12:54:55,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:55,123 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:54:55,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:54:56,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:54:56,105 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-11-23 12:54:56,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-23 12:54:58,171 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 12:54:58,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2021-11-23 12:54:59,439 INFO L354 Elim1Store]: treesize reduction 72, result has 10.0 percent of original size [2021-11-23 12:54:59,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 37 [2021-11-23 12:54:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 18 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:59,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:02,109 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-23 12:55:02,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 206 treesize of output 166 [2021-11-23 12:55:02,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:55:02,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 156 [2021-11-23 12:55:02,150 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-23 12:55:02,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 39 [2021-11-23 12:55:02,205 INFO L354 Elim1Store]: treesize reduction 9, result has 74.3 percent of original size [2021-11-23 12:55:02,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-11-23 12:55:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 23 proven. 404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:04,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744273559] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:04,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:04,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 41, 41] total 104 [2021-11-23 12:55:04,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198951542] [2021-11-23 12:55:04,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:04,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-23 12:55:04,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:04,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-23 12:55:04,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=10253, Unknown=1, NotChecked=0, Total=10712 [2021-11-23 12:55:04,386 INFO L87 Difference]: Start difference. First operand 8018 states and 9280 transitions. Second operand has 104 states, 104 states have (on average 3.0865384615384617) internal successors, (321), 104 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:09,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:09,558 INFO L93 Difference]: Finished difference Result 13747 states and 15880 transitions. [2021-11-23 12:55:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-23 12:55:09,558 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.0865384615384617) internal successors, (321), 104 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-23 12:55:09,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:09,567 INFO L225 Difference]: With dead ends: 13747 [2021-11-23 12:55:09,567 INFO L226 Difference]: Without dead ends: 13672 [2021-11-23 12:55:09,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5067 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=991, Invalid=23188, Unknown=1, NotChecked=0, Total=24180 [2021-11-23 12:55:09,569 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 322 mSDsluCounter, 6762 mSDsCounter, 0 mSdLazyCounter, 4532 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 6918 SdHoareTripleChecker+Invalid, 7536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 4532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2990 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:09,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 6918 Invalid, 7536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 4532 Invalid, 0 Unknown, 2990 Unchecked, 2.0s Time] [2021-11-23 12:55:09,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13672 states. [2021-11-23 12:55:09,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13672 to 11035. [2021-11-23 12:55:09,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11035 states, 11033 states have (on average 1.1586150638992114) internal successors, (12783), 11034 states have internal predecessors, (12783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:09,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11035 states to 11035 states and 12783 transitions. [2021-11-23 12:55:09,722 INFO L78 Accepts]: Start accepts. Automaton has 11035 states and 12783 transitions. Word has length 121 [2021-11-23 12:55:09,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:09,722 INFO L470 AbstractCegarLoop]: Abstraction has 11035 states and 12783 transitions. [2021-11-23 12:55:09,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.0865384615384617) internal successors, (321), 104 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 11035 states and 12783 transitions. [2021-11-23 12:55:09,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 12:55:09,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:09,727 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:09,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:09,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:09,930 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:55:09,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:09,930 INFO L85 PathProgramCache]: Analyzing trace with hash 771443421, now seen corresponding path program 10 times [2021-11-23 12:55:09,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:09,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260018322] [2021-11-23 12:55:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:09,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 35 proven. 509 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:55:10,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:10,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260018322] [2021-11-23 12:55:10,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260018322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:10,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564156438] [2021-11-23 12:55:10,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:55:10,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:10,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:10,599 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:10,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-23 12:55:10,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:55:10,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:55:10,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-23 12:55:10,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:10,728 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:55:10,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:55:11,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 12:55:12,424 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-23 12:55:12,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-11-23 12:55:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 261 proven. 283 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:55:12,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:13,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-11-23 12:55:13,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-23 12:55:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 260 proven. 284 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:55:15,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564156438] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:15,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:15,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 89 [2021-11-23 12:55:15,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236876816] [2021-11-23 12:55:15,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:15,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-23 12:55:15,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:15,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-23 12:55:15,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=7209, Unknown=0, NotChecked=0, Total=7832 [2021-11-23 12:55:15,249 INFO L87 Difference]: Start difference. First operand 11035 states and 12783 transitions. Second operand has 89 states, 89 states have (on average 3.8764044943820224) internal successors, (345), 89 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:34,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:34,085 INFO L93 Difference]: Finished difference Result 14662 states and 16390 transitions. [2021-11-23 12:55:34,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-11-23 12:55:34,086 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.8764044943820224) internal successors, (345), 89 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-23 12:55:34,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:34,098 INFO L225 Difference]: With dead ends: 14662 [2021-11-23 12:55:34,098 INFO L226 Difference]: Without dead ends: 13702 [2021-11-23 12:55:34,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19949 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=8606, Invalid=66744, Unknown=0, NotChecked=0, Total=75350 [2021-11-23 12:55:34,104 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 2249 mSDsluCounter, 10360 mSDsCounter, 0 mSdLazyCounter, 13085 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2249 SdHoareTripleChecker+Valid, 10662 SdHoareTripleChecker+Invalid, 14307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 13085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 994 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:34,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2249 Valid, 10662 Invalid, 14307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 13085 Invalid, 0 Unknown, 994 Unchecked, 5.3s Time] [2021-11-23 12:55:34,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13702 states. [2021-11-23 12:55:34,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13702 to 10199. [2021-11-23 12:55:34,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10199 states, 10197 states have (on average 1.1553398058252426) internal successors, (11781), 10198 states have internal predecessors, (11781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:34,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10199 states to 10199 states and 11781 transitions. [2021-11-23 12:55:34,224 INFO L78 Accepts]: Start accepts. Automaton has 10199 states and 11781 transitions. Word has length 123 [2021-11-23 12:55:34,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:34,224 INFO L470 AbstractCegarLoop]: Abstraction has 10199 states and 11781 transitions. [2021-11-23 12:55:34,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.8764044943820224) internal successors, (345), 89 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:34,225 INFO L276 IsEmpty]: Start isEmpty. Operand 10199 states and 11781 transitions. [2021-11-23 12:55:34,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-23 12:55:34,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:34,229 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:34,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:34,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:34,441 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:55:34,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:34,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1756095170, now seen corresponding path program 19 times [2021-11-23 12:55:34,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:34,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73119873] [2021-11-23 12:55:34,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:34,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 190 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:35,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:35,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73119873] [2021-11-23 12:55:35,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73119873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:35,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688285576] [2021-11-23 12:55:35,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:55:35,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:35,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:35,072 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:35,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-23 12:55:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:35,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-23 12:55:35,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 231 proven. 399 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:35,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:36,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 12:55:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 231 proven. 399 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:36,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688285576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:36,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:36,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 66 [2021-11-23 12:55:36,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35530322] [2021-11-23 12:55:36,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:36,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-23 12:55:36,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:36,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-23 12:55:36,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=3957, Unknown=0, NotChecked=0, Total=4422 [2021-11-23 12:55:36,859 INFO L87 Difference]: Start difference. First operand 10199 states and 11781 transitions. Second operand has 67 states, 66 states have (on average 3.803030303030303) internal successors, (251), 67 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:39,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:39,640 INFO L93 Difference]: Finished difference Result 14019 states and 16055 transitions. [2021-11-23 12:55:39,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-23 12:55:39,641 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 3.803030303030303) internal successors, (251), 67 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-23 12:55:39,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:39,652 INFO L225 Difference]: With dead ends: 14019 [2021-11-23 12:55:39,652 INFO L226 Difference]: Without dead ends: 14019 [2021-11-23 12:55:39,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2139, Invalid=9203, Unknown=0, NotChecked=0, Total=11342 [2021-11-23 12:55:39,653 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 935 mSDsluCounter, 2133 mSDsCounter, 0 mSdLazyCounter, 3244 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 2241 SdHoareTripleChecker+Invalid, 3321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 3244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:39,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 2241 Invalid, 3321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 3244 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 12:55:39,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14019 states. [2021-11-23 12:55:39,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14019 to 12022. [2021-11-23 12:55:39,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12022 states, 12020 states have (on average 1.1620632279534109) internal successors, (13968), 12021 states have internal predecessors, (13968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:39,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12022 states to 12022 states and 13968 transitions. [2021-11-23 12:55:39,770 INFO L78 Accepts]: Start accepts. Automaton has 12022 states and 13968 transitions. Word has length 124 [2021-11-23 12:55:39,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:39,771 INFO L470 AbstractCegarLoop]: Abstraction has 12022 states and 13968 transitions. [2021-11-23 12:55:39,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 3.803030303030303) internal successors, (251), 67 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:39,771 INFO L276 IsEmpty]: Start isEmpty. Operand 12022 states and 13968 transitions. [2021-11-23 12:55:39,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 12:55:39,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:39,776 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:39,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:39,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-23 12:55:39,977 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:55:39,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:39,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1679256965, now seen corresponding path program 14 times [2021-11-23 12:55:39,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:39,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776535512] [2021-11-23 12:55:39,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:39,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 91 proven. 368 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:55:40,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:40,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776535512] [2021-11-23 12:55:40,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776535512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:40,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415428163] [2021-11-23 12:55:40,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:55:40,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:40,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:40,400 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:40,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-23 12:55:40,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:55:40,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:55:40,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-23 12:55:40,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 120 proven. 339 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:55:41,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:41,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 12:55:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 120 proven. 339 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:55:42,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415428163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:42,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:42,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 50 [2021-11-23 12:55:42,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021891181] [2021-11-23 12:55:42,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:42,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 12:55:42,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:42,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 12:55:42,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=2264, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 12:55:42,004 INFO L87 Difference]: Start difference. First operand 12022 states and 13968 transitions. Second operand has 51 states, 50 states have (on average 5.02) internal successors, (251), 51 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:43,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:43,992 INFO L93 Difference]: Finished difference Result 15742 states and 18294 transitions. [2021-11-23 12:55:43,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-23 12:55:43,993 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 5.02) internal successors, (251), 51 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-23 12:55:43,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:44,005 INFO L225 Difference]: With dead ends: 15742 [2021-11-23 12:55:44,005 INFO L226 Difference]: Without dead ends: 15742 [2021-11-23 12:55:44,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 221 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1259, Invalid=5547, Unknown=0, NotChecked=0, Total=6806 [2021-11-23 12:55:44,006 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 597 mSDsluCounter, 2541 mSDsCounter, 0 mSdLazyCounter, 2179 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 2217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:44,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 2705 Invalid, 2217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2179 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 12:55:44,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15742 states. [2021-11-23 12:55:44,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15742 to 12444. [2021-11-23 12:55:44,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12444 states, 12442 states have (on average 1.1621925735412313) internal successors, (14460), 12443 states have internal predecessors, (14460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12444 states to 12444 states and 14460 transitions. [2021-11-23 12:55:44,208 INFO L78 Accepts]: Start accepts. Automaton has 12444 states and 14460 transitions. Word has length 125 [2021-11-23 12:55:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:44,208 INFO L470 AbstractCegarLoop]: Abstraction has 12444 states and 14460 transitions. [2021-11-23 12:55:44,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 5.02) internal successors, (251), 51 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:44,208 INFO L276 IsEmpty]: Start isEmpty. Operand 12444 states and 14460 transitions. [2021-11-23 12:55:44,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-23 12:55:44,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:44,214 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:44,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:44,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:44,414 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:55:44,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:44,415 INFO L85 PathProgramCache]: Analyzing trace with hash 840045729, now seen corresponding path program 5 times [2021-11-23 12:55:44,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:44,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513891615] [2021-11-23 12:55:44,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:44,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 323 proven. 114 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 12:55:44,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:44,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513891615] [2021-11-23 12:55:44,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513891615] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:44,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647271835] [2021-11-23 12:55:44,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:55:44,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:44,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:44,766 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:44,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-23 12:55:44,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-23 12:55:44,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:55:44,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-23 12:55:44,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:44,985 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:55:44,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:55:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 338 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 12:55:47,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 338 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 12:55:49,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647271835] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:49,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:49,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 27] total 64 [2021-11-23 12:55:49,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340400238] [2021-11-23 12:55:49,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:49,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-23 12:55:49,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:49,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-23 12:55:49,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=523, Invalid=3509, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 12:55:49,024 INFO L87 Difference]: Start difference. First operand 12444 states and 14460 transitions. Second operand has 64 states, 64 states have (on average 4.265625) internal successors, (273), 64 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:49,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:49,886 INFO L93 Difference]: Finished difference Result 15029 states and 17436 transitions. [2021-11-23 12:55:49,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-23 12:55:49,886 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 4.265625) internal successors, (273), 64 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-23 12:55:49,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:49,897 INFO L225 Difference]: With dead ends: 15029 [2021-11-23 12:55:49,897 INFO L226 Difference]: Without dead ends: 12569 [2021-11-23 12:55:49,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=798, Invalid=5844, Unknown=0, NotChecked=0, Total=6642 [2021-11-23 12:55:49,900 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 75 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:49,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1535 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 261 Unchecked, 0.2s Time] [2021-11-23 12:55:49,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12569 states. [2021-11-23 12:55:49,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12569 to 9626. [2021-11-23 12:55:49,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9626 states, 9624 states have (on average 1.161783042394015) internal successors, (11181), 9625 states have internal predecessors, (11181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9626 states to 9626 states and 11181 transitions. [2021-11-23 12:55:50,008 INFO L78 Accepts]: Start accepts. Automaton has 9626 states and 11181 transitions. Word has length 126 [2021-11-23 12:55:50,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:50,008 INFO L470 AbstractCegarLoop]: Abstraction has 9626 states and 11181 transitions. [2021-11-23 12:55:50,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 4.265625) internal successors, (273), 64 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:50,009 INFO L276 IsEmpty]: Start isEmpty. Operand 9626 states and 11181 transitions. [2021-11-23 12:55:50,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-23 12:55:50,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:50,013 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:50,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-23 12:55:50,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-23 12:55:50,213 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:55:50,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:50,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1101030624, now seen corresponding path program 11 times [2021-11-23 12:55:50,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:50,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697836323] [2021-11-23 12:55:50,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:50,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 153 proven. 432 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:55:50,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:50,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697836323] [2021-11-23 12:55:50,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697836323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:50,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94849445] [2021-11-23 12:55:50,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:55:50,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:50,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:50,846 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:50,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-23 12:55:50,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-23 12:55:50,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:55:50,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-23 12:55:50,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:51,000 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:55:51,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:55:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 190 proven. 395 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:55:52,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 231 proven. 354 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:55:53,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94849445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:53,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:53,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 70 [2021-11-23 12:55:53,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866271835] [2021-11-23 12:55:53,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:53,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-23 12:55:53,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:53,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-23 12:55:53,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=4417, Unknown=0, NotChecked=0, Total=4970 [2021-11-23 12:55:53,847 INFO L87 Difference]: Start difference. First operand 9626 states and 11181 transitions. Second operand has 71 states, 70 states have (on average 4.5) internal successors, (315), 71 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:57,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:57,218 INFO L93 Difference]: Finished difference Result 11797 states and 13410 transitions. [2021-11-23 12:55:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-23 12:55:57,219 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 4.5) internal successors, (315), 71 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-23 12:55:57,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:57,228 INFO L225 Difference]: With dead ends: 11797 [2021-11-23 12:55:57,228 INFO L226 Difference]: Without dead ends: 11797 [2021-11-23 12:55:57,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2868 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2598, Invalid=10974, Unknown=0, NotChecked=0, Total=13572 [2021-11-23 12:55:57,230 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 807 mSDsluCounter, 2269 mSDsCounter, 0 mSdLazyCounter, 3162 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 2363 SdHoareTripleChecker+Invalid, 3224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 3162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:57,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 2363 Invalid, 3224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 3162 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 12:55:57,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11797 states. [2021-11-23 12:55:57,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11797 to 9736. [2021-11-23 12:55:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9736 states, 9734 states have (on average 1.1622149167865214) internal successors, (11313), 9735 states have internal predecessors, (11313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:57,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9736 states to 9736 states and 11313 transitions. [2021-11-23 12:55:57,380 INFO L78 Accepts]: Start accepts. Automaton has 9736 states and 11313 transitions. Word has length 127 [2021-11-23 12:55:57,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:57,380 INFO L470 AbstractCegarLoop]: Abstraction has 9736 states and 11313 transitions. [2021-11-23 12:55:57,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 4.5) internal successors, (315), 71 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:57,381 INFO L276 IsEmpty]: Start isEmpty. Operand 9736 states and 11313 transitions. [2021-11-23 12:55:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-23 12:55:57,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:57,385 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:57,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:57,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-23 12:55:57,585 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:55:57,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:57,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1004203597, now seen corresponding path program 20 times [2021-11-23 12:55:57,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:57,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649893676] [2021-11-23 12:55:57,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:57,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 38 proven. 654 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:58,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:58,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649893676] [2021-11-23 12:55:58,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649893676] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:58,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371078558] [2021-11-23 12:55:58,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:55:58,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:58,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:58,316 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:58,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-23 12:55:58,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:55:58,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:55:58,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 140 conjunts are in the unsatisfiable core [2021-11-23 12:55:58,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:58,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 12:56:01,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:56:01,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-23 12:56:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 231 proven. 461 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:02,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:56:04,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-23 12:56:04,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-11-23 12:56:04,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-11-23 12:56:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 231 proven. 461 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:04,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371078558] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:56:04,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:56:04,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 92 [2021-11-23 12:56:04,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825261482] [2021-11-23 12:56:04,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:56:04,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-23 12:56:04,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:56:04,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-23 12:56:04,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=7859, Unknown=0, NotChecked=0, Total=8372 [2021-11-23 12:56:04,511 INFO L87 Difference]: Start difference. First operand 9736 states and 11313 transitions. Second operand has 92 states, 92 states have (on average 3.5434782608695654) internal successors, (326), 92 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:13,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:56:13,400 INFO L93 Difference]: Finished difference Result 11936 states and 13726 transitions. [2021-11-23 12:56:13,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-23 12:56:13,401 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.5434782608695654) internal successors, (326), 92 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-11-23 12:56:13,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:56:13,410 INFO L225 Difference]: With dead ends: 11936 [2021-11-23 12:56:13,410 INFO L226 Difference]: Without dead ends: 11830 [2021-11-23 12:56:13,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5586 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1357, Invalid=20993, Unknown=0, NotChecked=0, Total=22350 [2021-11-23 12:56:13,411 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 1196 mSDsluCounter, 6524 mSDsCounter, 0 mSdLazyCounter, 4724 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 6743 SdHoareTripleChecker+Invalid, 7033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 4724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2273 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:56:13,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1196 Valid, 6743 Invalid, 7033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 4724 Invalid, 0 Unknown, 2273 Unchecked, 2.2s Time] [2021-11-23 12:56:13,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11830 states. [2021-11-23 12:56:13,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11830 to 10441. [2021-11-23 12:56:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10441 states, 10439 states have (on average 1.1624676693169844) internal successors, (12135), 10440 states have internal predecessors, (12135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:13,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10441 states to 10441 states and 12135 transitions. [2021-11-23 12:56:13,514 INFO L78 Accepts]: Start accepts. Automaton has 10441 states and 12135 transitions. Word has length 129 [2021-11-23 12:56:13,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:56:13,514 INFO L470 AbstractCegarLoop]: Abstraction has 10441 states and 12135 transitions. [2021-11-23 12:56:13,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.5434782608695654) internal successors, (326), 92 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:13,514 INFO L276 IsEmpty]: Start isEmpty. Operand 10441 states and 12135 transitions. [2021-11-23 12:56:13,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-23 12:56:13,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:56:13,520 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:56:13,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-23 12:56:13,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-23 12:56:13,746 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:56:13,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:56:13,746 INFO L85 PathProgramCache]: Analyzing trace with hash 251620040, now seen corresponding path program 6 times [2021-11-23 12:56:13,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:56:13,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424528751] [2021-11-23 12:56:13,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:56:13,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:56:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:56:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 449 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 12:56:14,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:56:14,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424528751] [2021-11-23 12:56:14,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424528751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:56:14,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535012084] [2021-11-23 12:56:14,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:56:14,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:56:14,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:56:14,344 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:56:14,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-23 12:56:14,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-23 12:56:14,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:56:14,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-23 12:56:14,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:56:14,596 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:56:14,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:56:14,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 12:56:15,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 12:56:15,829 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-23 12:56:15,830 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-23 12:56:18,000 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 12:56:18,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 48 [2021-11-23 12:56:18,011 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-23 12:56:18,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 33 [2021-11-23 12:56:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 251 proven. 216 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 12:56:18,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:56:21,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2021-11-23 12:56:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 250 proven. 217 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 12:56:22,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535012084] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:56:22,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:56:22,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 73 [2021-11-23 12:56:22,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26064808] [2021-11-23 12:56:22,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:56:22,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-23 12:56:22,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:56:22,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-23 12:56:22,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=4847, Unknown=1, NotChecked=0, Total=5256 [2021-11-23 12:56:22,440 INFO L87 Difference]: Start difference. First operand 10441 states and 12135 transitions. Second operand has 73 states, 73 states have (on average 4.698630136986301) internal successors, (343), 73 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:27,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:56:27,836 INFO L93 Difference]: Finished difference Result 13731 states and 15915 transitions. [2021-11-23 12:56:27,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-23 12:56:27,836 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 4.698630136986301) internal successors, (343), 73 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-23 12:56:27,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:56:27,844 INFO L225 Difference]: With dead ends: 13731 [2021-11-23 12:56:27,844 INFO L226 Difference]: Without dead ends: 11145 [2021-11-23 12:56:27,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 225 SyntacticMatches, 2 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3735 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1734, Invalid=18005, Unknown=1, NotChecked=0, Total=19740 [2021-11-23 12:56:27,845 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 503 mSDsluCounter, 3566 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 3669 SdHoareTripleChecker+Invalid, 3059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:56:27,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 3669 Invalid, 3059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2532 Invalid, 0 Unknown, 444 Unchecked, 1.2s Time] [2021-11-23 12:56:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11145 states. [2021-11-23 12:56:27,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11145 to 7182. [2021-11-23 12:56:27,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 7180 states have (on average 1.1614206128133704) internal successors, (8339), 7181 states have internal predecessors, (8339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 8339 transitions. [2021-11-23 12:56:27,941 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 8339 transitions. Word has length 130 [2021-11-23 12:56:27,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:56:27,941 INFO L470 AbstractCegarLoop]: Abstraction has 7182 states and 8339 transitions. [2021-11-23 12:56:27,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 4.698630136986301) internal successors, (343), 73 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:27,941 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 8339 transitions. [2021-11-23 12:56:27,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 12:56:27,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:56:27,945 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:56:27,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-23 12:56:28,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-23 12:56:28,146 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:56:28,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:56:28,146 INFO L85 PathProgramCache]: Analyzing trace with hash -438419631, now seen corresponding path program 12 times [2021-11-23 12:56:28,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:56:28,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912041584] [2021-11-23 12:56:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:56:28,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:56:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:56:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 38 proven. 609 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:56:28,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:56:28,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912041584] [2021-11-23 12:56:28,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912041584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:56:28,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742849532] [2021-11-23 12:56:28,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:56:28,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:56:28,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:56:28,898 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:56:28,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-23 12:56:29,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-23 12:56:29,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:56:29,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-23 12:56:29,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:56:29,339 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:56:29,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:56:29,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 12:56:30,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:56:30,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-23 12:56:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 11 proven. 119 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2021-11-23 12:56:30,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:56:31,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-11-23 12:56:31,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-11-23 12:56:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2021-11-23 12:56:32,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742849532] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:56:32,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:56:32,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 10, 10] total 53 [2021-11-23 12:56:32,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809789749] [2021-11-23 12:56:32,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:56:32,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-23 12:56:32,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:56:32,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-23 12:56:32,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2613, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 12:56:32,477 INFO L87 Difference]: Start difference. First operand 7182 states and 8339 transitions. Second operand has 53 states, 53 states have (on average 3.811320754716981) internal successors, (202), 53 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:52,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:56:52,664 INFO L93 Difference]: Finished difference Result 7949 states and 9048 transitions. [2021-11-23 12:56:52,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-11-23 12:56:52,664 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.811320754716981) internal successors, (202), 53 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-23 12:56:52,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:56:52,668 INFO L225 Difference]: With dead ends: 7949 [2021-11-23 12:56:52,668 INFO L226 Difference]: Without dead ends: 4914 [2021-11-23 12:56:52,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14710 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=4474, Invalid=46828, Unknown=0, NotChecked=0, Total=51302 [2021-11-23 12:56:52,672 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 736 mSDsluCounter, 3177 mSDsCounter, 0 mSdLazyCounter, 10226 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 3272 SdHoareTripleChecker+Invalid, 10592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 10226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:56:52,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 3272 Invalid, 10592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 10226 Invalid, 0 Unknown, 218 Unchecked, 5.2s Time] [2021-11-23 12:56:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4914 states. [2021-11-23 12:56:52,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4914 to 3804. [2021-11-23 12:56:52,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 1.1540888772022089) internal successors, (4389), 3803 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:52,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 4389 transitions. [2021-11-23 12:56:52,715 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 4389 transitions. Word has length 132 [2021-11-23 12:56:52,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:56:52,715 INFO L470 AbstractCegarLoop]: Abstraction has 3804 states and 4389 transitions. [2021-11-23 12:56:52,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.811320754716981) internal successors, (202), 53 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:52,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 4389 transitions. [2021-11-23 12:56:52,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 12:56:52,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:56:52,719 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:56:52,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-23 12:56:52,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:56:52,934 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:56:52,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:56:52,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1075876496, now seen corresponding path program 15 times [2021-11-23 12:56:52,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:56:52,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324989563] [2021-11-23 12:56:52,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:56:52,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:56:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:56:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 20 proven. 513 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:56:53,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:56:53,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324989563] [2021-11-23 12:56:53,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324989563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:56:53,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850752816] [2021-11-23 12:56:53,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:56:53,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:56:53,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:56:53,993 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:56:53,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-23 12:56:54,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 12:56:54,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:56:54,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-23 12:56:54,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:56:54,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 12:56:55,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:56:55,242 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-23 12:56:55,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-23 12:56:57,873 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-23 12:56:57,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-11-23 12:56:58,078 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 20 proven. 513 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:56:58,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:57:21,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:57:21,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 12:57:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 20 proven. 513 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:57:22,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850752816] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:57:22,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:57:22,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 30, 29] total 87 [2021-11-23 12:57:22,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760824743] [2021-11-23 12:57:22,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:57:22,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-23 12:57:22,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:57:22,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-23 12:57:22,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=7239, Unknown=0, NotChecked=0, Total=7482 [2021-11-23 12:57:22,181 INFO L87 Difference]: Start difference. First operand 3804 states and 4389 transitions. Second operand has 87 states, 87 states have (on average 4.2988505747126435) internal successors, (374), 87 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:57:25,570 INFO L93 Difference]: Finished difference Result 7284 states and 8334 transitions. [2021-11-23 12:57:25,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 12:57:25,571 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 4.2988505747126435) internal successors, (374), 87 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-23 12:57:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:57:25,574 INFO L225 Difference]: With dead ends: 7284 [2021-11-23 12:57:25,574 INFO L226 Difference]: Without dead ends: 4397 [2021-11-23 12:57:25,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2071 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=445, Invalid=13835, Unknown=0, NotChecked=0, Total=14280 [2021-11-23 12:57:25,575 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 80 mSDsluCounter, 3221 mSDsCounter, 0 mSdLazyCounter, 1578 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 3284 SdHoareTripleChecker+Invalid, 2386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 790 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 12:57:25,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 3284 Invalid, 2386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1578 Invalid, 0 Unknown, 790 Unchecked, 0.7s Time] [2021-11-23 12:57:25,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4397 states. [2021-11-23 12:57:25,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4397 to 4394. [2021-11-23 12:57:25,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4394 states, 4393 states have (on average 1.151377190985659) internal successors, (5058), 4393 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:25,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4394 states to 4394 states and 5058 transitions. [2021-11-23 12:57:25,620 INFO L78 Accepts]: Start accepts. Automaton has 4394 states and 5058 transitions. Word has length 133 [2021-11-23 12:57:25,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:57:25,620 INFO L470 AbstractCegarLoop]: Abstraction has 4394 states and 5058 transitions. [2021-11-23 12:57:25,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 4.2988505747126435) internal successors, (374), 87 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:25,620 INFO L276 IsEmpty]: Start isEmpty. Operand 4394 states and 5058 transitions. [2021-11-23 12:57:25,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-23 12:57:25,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:57:25,622 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:57:25,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-23 12:57:25,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:57:25,823 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:57:25,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:57:25,824 INFO L85 PathProgramCache]: Analyzing trace with hash -870571629, now seen corresponding path program 16 times [2021-11-23 12:57:25,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:57:25,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683427912] [2021-11-23 12:57:25,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:57:25,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:57:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:57:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 120 proven. 450 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:57:26,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:57:26,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683427912] [2021-11-23 12:57:26,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683427912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:57:26,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042714965] [2021-11-23 12:57:26,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:57:26,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:57:26,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:57:26,489 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:57:26,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-23 12:57:26,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:57:26,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:57:26,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 166 conjunts are in the unsatisfiable core [2021-11-23 12:57:26,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:57:26,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 12:57:26,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 12:57:28,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 12:57:28,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-23 12:57:32,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:57:32,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:57:32,101 INFO L354 Elim1Store]: treesize reduction 48, result has 26.2 percent of original size [2021-11-23 12:57:32,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 37 [2021-11-23 12:57:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 162 proven. 408 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:57:32,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:57:36,938 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-23 12:57:36,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 219 treesize of output 179 [2021-11-23 12:57:36,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:57:36,948 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 175 treesize of output 169 [2021-11-23 12:57:36,987 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-23 12:57:36,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 47 [2021-11-23 12:57:37,063 INFO L354 Elim1Store]: treesize reduction 5, result has 85.7 percent of original size [2021-11-23 12:57:37,064 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 76 treesize of output 88 [2021-11-23 12:57:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 190 proven. 380 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:57:45,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042714965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:57:45,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:57:45,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 39, 39] total 102 [2021-11-23 12:57:45,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673646642] [2021-11-23 12:57:45,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:57:45,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-23 12:57:45,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:57:45,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-23 12:57:45,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1164, Invalid=9342, Unknown=0, NotChecked=0, Total=10506 [2021-11-23 12:57:45,815 INFO L87 Difference]: Start difference. First operand 4394 states and 5058 transitions. Second operand has 103 states, 102 states have (on average 3.950980392156863) internal successors, (403), 103 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:18,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:58:18,310 INFO L93 Difference]: Finished difference Result 10487 states and 12124 transitions. [2021-11-23 12:58:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-11-23 12:58:18,311 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 102 states have (on average 3.950980392156863) internal successors, (403), 103 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-23 12:58:18,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:58:18,317 INFO L225 Difference]: With dead ends: 10487 [2021-11-23 12:58:18,317 INFO L226 Difference]: Without dead ends: 10487 [2021-11-23 12:58:18,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22309 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=14085, Invalid=54297, Unknown=0, NotChecked=0, Total=68382 [2021-11-23 12:58:18,321 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 3130 mSDsluCounter, 2443 mSDsCounter, 0 mSdLazyCounter, 3667 mSolverCounterSat, 927 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3130 SdHoareTripleChecker+Valid, 2516 SdHoareTripleChecker+Invalid, 5417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 927 IncrementalHoareTripleChecker+Valid, 3667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 823 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:58:18,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3130 Valid, 2516 Invalid, 5417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [927 Valid, 3667 Invalid, 0 Unknown, 823 Unchecked, 3.1s Time] [2021-11-23 12:58:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10487 states. [2021-11-23 12:58:18,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10487 to 7339. [2021-11-23 12:58:18,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7339 states, 7338 states have (on average 1.1576723902970836) internal successors, (8495), 7338 states have internal predecessors, (8495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:18,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7339 states to 7339 states and 8495 transitions. [2021-11-23 12:58:18,409 INFO L78 Accepts]: Start accepts. Automaton has 7339 states and 8495 transitions. Word has length 137 [2021-11-23 12:58:18,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:58:18,409 INFO L470 AbstractCegarLoop]: Abstraction has 7339 states and 8495 transitions. [2021-11-23 12:58:18,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 102 states have (on average 3.950980392156863) internal successors, (403), 103 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:18,410 INFO L276 IsEmpty]: Start isEmpty. Operand 7339 states and 8495 transitions. [2021-11-23 12:58:18,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-23 12:58:18,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:58:18,412 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:58:18,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-23 12:58:18,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:58:18,614 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:58:18,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:58:18,614 INFO L85 PathProgramCache]: Analyzing trace with hash 764408791, now seen corresponding path program 7 times [2021-11-23 12:58:18,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:58:18,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060902051] [2021-11-23 12:58:18,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:58:18,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:58:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:58:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 120 proven. 495 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 12:58:19,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:58:19,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060902051] [2021-11-23 12:58:19,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060902051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:58:19,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109032789] [2021-11-23 12:58:19,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:58:19,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:58:19,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:58:19,080 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:58:19,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-23 12:58:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:58:19,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-23 12:58:19,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:58:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 153 proven. 462 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 12:58:19,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:58:20,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 12:58:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 153 proven. 462 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 12:58:21,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109032789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:58:21,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:58:21,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 54 [2021-11-23 12:58:21,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290817315] [2021-11-23 12:58:21,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:58:21,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-23 12:58:21,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:58:21,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-23 12:58:21,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2637, Unknown=0, NotChecked=0, Total=2970 [2021-11-23 12:58:21,038 INFO L87 Difference]: Start difference. First operand 7339 states and 8495 transitions. Second operand has 55 states, 54 states have (on average 5.12962962962963) internal successors, (277), 55 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:22,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:58:22,657 INFO L93 Difference]: Finished difference Result 13605 states and 15794 transitions. [2021-11-23 12:58:22,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-23 12:58:22,657 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 5.12962962962963) internal successors, (277), 55 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-23 12:58:22,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:58:22,669 INFO L225 Difference]: With dead ends: 13605 [2021-11-23 12:58:22,669 INFO L226 Difference]: Without dead ends: 13605 [2021-11-23 12:58:22,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 261 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1243, Invalid=5237, Unknown=0, NotChecked=0, Total=6480 [2021-11-23 12:58:22,670 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 485 mSDsluCounter, 1760 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1859 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 12:58:22,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 1859 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 12:58:22,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13605 states. [2021-11-23 12:58:22,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13605 to 10419. [2021-11-23 12:58:22,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10419 states, 10418 states have (on average 1.1578038011134575) internal successors, (12062), 10418 states have internal predecessors, (12062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10419 states to 10419 states and 12062 transitions. [2021-11-23 12:58:22,794 INFO L78 Accepts]: Start accepts. Automaton has 10419 states and 12062 transitions. Word has length 146 [2021-11-23 12:58:22,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:58:22,795 INFO L470 AbstractCegarLoop]: Abstraction has 10419 states and 12062 transitions. [2021-11-23 12:58:22,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 5.12962962962963) internal successors, (277), 55 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 10419 states and 12062 transitions. [2021-11-23 12:58:22,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-23 12:58:22,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:58:22,799 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 10, 10, 10, 9, 9, 9, 9, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:58:22,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-23 12:58:22,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:58:23,000 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:58:23,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:58:23,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1634175363, now seen corresponding path program 8 times [2021-11-23 12:58:23,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:58:23,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473320162] [2021-11-23 12:58:23,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:58:23,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:58:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:58:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 20 proven. 609 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 12:58:23,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:58:23,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473320162] [2021-11-23 12:58:23,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473320162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:58:23,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042607285] [2021-11-23 12:58:23,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:58:23,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:58:23,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:58:23,749 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:58:23,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-23 12:58:23,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:58:23,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:58:23,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-23 12:58:23,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:58:23,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 12:58:24,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 12:58:24,651 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-23 12:58:24,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-11-23 12:58:27,551 INFO L354 Elim1Store]: treesize reduction 39, result has 17.0 percent of original size [2021-11-23 12:58:27,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 30 [2021-11-23 12:58:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 121 proven. 508 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 12:58:28,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:58:30,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-23 12:58:30,714 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 46 treesize of output 42 [2021-11-23 12:58:30,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2021-11-23 12:58:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 120 proven. 509 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 12:58:31,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042607285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:58:31,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:58:31,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 29] total 87 [2021-11-23 12:58:31,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173169964] [2021-11-23 12:58:31,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:58:31,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-23 12:58:31,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:58:31,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-23 12:58:31,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=6962, Unknown=0, NotChecked=0, Total=7482 [2021-11-23 12:58:31,702 INFO L87 Difference]: Start difference. First operand 10419 states and 12062 transitions. Second operand has 87 states, 87 states have (on average 4.597701149425287) internal successors, (400), 87 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:35,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:58:35,603 INFO L93 Difference]: Finished difference Result 10729 states and 12353 transitions. [2021-11-23 12:58:35,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-23 12:58:35,603 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 4.597701149425287) internal successors, (400), 87 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-23 12:58:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:58:35,609 INFO L225 Difference]: With dead ends: 10729 [2021-11-23 12:58:35,609 INFO L226 Difference]: Without dead ends: 7063 [2021-11-23 12:58:35,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 254 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2591 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1135, Invalid=14867, Unknown=0, NotChecked=0, Total=16002 [2021-11-23 12:58:35,611 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 431 mSDsluCounter, 4287 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 4415 SdHoareTripleChecker+Invalid, 2195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 603 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 12:58:35,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 4415 Invalid, 2195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1565 Invalid, 0 Unknown, 603 Unchecked, 0.8s Time] [2021-11-23 12:58:35,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7063 states. [2021-11-23 12:58:35,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7063 to 7028. [2021-11-23 12:58:35,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7028 states, 7027 states have (on average 1.159954461363313) internal successors, (8151), 7027 states have internal predecessors, (8151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:35,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7028 states to 7028 states and 8151 transitions. [2021-11-23 12:58:35,679 INFO L78 Accepts]: Start accepts. Automaton has 7028 states and 8151 transitions. Word has length 147 [2021-11-23 12:58:35,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:58:35,680 INFO L470 AbstractCegarLoop]: Abstraction has 7028 states and 8151 transitions. [2021-11-23 12:58:35,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 4.597701149425287) internal successors, (400), 87 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:35,680 INFO L276 IsEmpty]: Start isEmpty. Operand 7028 states and 8151 transitions. [2021-11-23 12:58:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 12:58:35,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:58:35,708 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:58:35,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-23 12:58:35,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-11-23 12:58:35,909 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:58:35,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:58:35,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1637787362, now seen corresponding path program 9 times [2021-11-23 12:58:35,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:58:35,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074451693] [2021-11-23 12:58:35,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:58:35,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:58:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:58:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 22 proven. 680 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 12:58:37,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:58:37,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074451693] [2021-11-23 12:58:37,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074451693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:58:37,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666547385] [2021-11-23 12:58:37,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:58:37,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:58:37,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:58:37,257 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:58:37,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-23 12:58:37,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-23 12:58:37,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:58:37,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 134 conjunts are in the unsatisfiable core [2021-11-23 12:58:37,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:58:37,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 12:58:38,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:58:38,619 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-23 12:58:38,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-23 12:58:41,519 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-23 12:58:41,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-11-23 12:58:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 22 proven. 680 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 12:58:41,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:59:05,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:59:05,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 12:59:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 22 proven. 680 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 12:59:06,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666547385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:59:06,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:59:06,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 32, 31] total 93 [2021-11-23 12:59:06,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942272666] [2021-11-23 12:59:06,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:59:06,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-23 12:59:06,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:59:06,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-23 12:59:06,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=8297, Unknown=0, NotChecked=0, Total=8556 [2021-11-23 12:59:06,244 INFO L87 Difference]: Start difference. First operand 7028 states and 8151 transitions. Second operand has 93 states, 93 states have (on average 4.440860215053763) internal successors, (413), 93 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:10,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:59:10,682 INFO L93 Difference]: Finished difference Result 11262 states and 12897 transitions. [2021-11-23 12:59:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-23 12:59:10,682 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 4.440860215053763) internal successors, (413), 93 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-23 12:59:10,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:59:10,688 INFO L225 Difference]: With dead ends: 11262 [2021-11-23 12:59:10,688 INFO L226 Difference]: Without dead ends: 7643 [2021-11-23 12:59:10,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 253 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=528, Invalid=17832, Unknown=0, NotChecked=0, Total=18360 [2021-11-23 12:59:10,689 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 72 mSDsluCounter, 4312 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 4390 SdHoareTripleChecker+Invalid, 2701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 574 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:59:10,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 4390 Invalid, 2701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2110 Invalid, 0 Unknown, 574 Unchecked, 1.0s Time] [2021-11-23 12:59:10,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7643 states. [2021-11-23 12:59:10,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7643 to 7618. [2021-11-23 12:59:10,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7618 states, 7617 states have (on average 1.157936195352501) internal successors, (8820), 7617 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:10,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7618 states to 7618 states and 8820 transitions. [2021-11-23 12:59:10,765 INFO L78 Accepts]: Start accepts. Automaton has 7618 states and 8820 transitions. Word has length 154 [2021-11-23 12:59:10,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:59:10,765 INFO L470 AbstractCegarLoop]: Abstraction has 7618 states and 8820 transitions. [2021-11-23 12:59:10,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 4.440860215053763) internal successors, (413), 93 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 7618 states and 8820 transitions. [2021-11-23 12:59:10,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-23 12:59:10,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:59:10,768 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:59:10,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-11-23 12:59:10,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-11-23 12:59:10,982 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:59:10,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:59:10,982 INFO L85 PathProgramCache]: Analyzing trace with hash -145512513, now seen corresponding path program 10 times [2021-11-23 12:59:10,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:59:10,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526864033] [2021-11-23 12:59:10,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:59:10,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:59:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:59:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 153 proven. 590 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 12:59:11,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:59:11,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526864033] [2021-11-23 12:59:11,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526864033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:59:11,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871745583] [2021-11-23 12:59:11,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:59:11,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:59:11,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:59:11,598 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:59:11,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-23 12:59:11,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:59:11,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:59:11,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 135 conjunts are in the unsatisfiable core [2021-11-23 12:59:11,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:59:11,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 12:59:11,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 12:59:13,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 12:59:13,117 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-23 12:59:13,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-23 12:59:16,048 INFO L354 Elim1Store]: treesize reduction 45, result has 18.2 percent of original size [2021-11-23 12:59:16,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 24 [2021-11-23 12:59:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 200 proven. 543 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 12:59:16,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:59:21,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 63 [2021-11-23 12:59:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 231 proven. 512 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 12:59:23,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871745583] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:59:23,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:59:23,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 33, 33] total 92 [2021-11-23 12:59:23,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58126241] [2021-11-23 12:59:23,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:59:23,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-23 12:59:23,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:59:23,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-23 12:59:23,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=7710, Unknown=1, NotChecked=0, Total=8556 [2021-11-23 12:59:23,096 INFO L87 Difference]: Start difference. First operand 7618 states and 8820 transitions. Second operand has 93 states, 92 states have (on average 4.804347826086956) internal successors, (442), 93 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:27,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:59:27,659 INFO L93 Difference]: Finished difference Result 13258 states and 15326 transitions. [2021-11-23 12:59:27,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-23 12:59:27,660 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 4.804347826086956) internal successors, (442), 93 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-23 12:59:27,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:59:27,671 INFO L225 Difference]: With dead ends: 13258 [2021-11-23 12:59:27,672 INFO L226 Difference]: Without dead ends: 13258 [2021-11-23 12:59:27,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 274 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3825 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=1764, Invalid=17141, Unknown=1, NotChecked=0, Total=18906 [2021-11-23 12:59:27,673 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 321 mSDsluCounter, 3643 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 3743 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 424 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 12:59:27,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 3743 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1507 Invalid, 0 Unknown, 424 Unchecked, 0.8s Time] [2021-11-23 12:59:27,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13258 states. [2021-11-23 12:59:27,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13258 to 12178. [2021-11-23 12:59:27,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12178 states, 12177 states have (on average 1.1576743040157675) internal successors, (14097), 12177 states have internal predecessors, (14097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:27,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12178 states to 12178 states and 14097 transitions. [2021-11-23 12:59:27,793 INFO L78 Accepts]: Start accepts. Automaton has 12178 states and 14097 transitions. Word has length 158 [2021-11-23 12:59:27,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:59:27,794 INFO L470 AbstractCegarLoop]: Abstraction has 12178 states and 14097 transitions. [2021-11-23 12:59:27,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 4.804347826086956) internal successors, (442), 93 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:27,794 INFO L276 IsEmpty]: Start isEmpty. Operand 12178 states and 14097 transitions. [2021-11-23 12:59:27,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-23 12:59:27,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:59:27,799 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 12, 12, 12, 10, 10, 10, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:59:27,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-23 12:59:28,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-11-23 12:59:28,002 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:59:28,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:59:28,002 INFO L85 PathProgramCache]: Analyzing trace with hash 2142995548, now seen corresponding path program 11 times [2021-11-23 12:59:28,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:59:28,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917427952] [2021-11-23 12:59:28,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:59:28,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:59:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:59:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 635 proven. 222 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 12:59:28,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:59:28,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917427952] [2021-11-23 12:59:28,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917427952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:59:28,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700903495] [2021-11-23 12:59:28,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:59:28,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:59:28,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:59:28,570 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:59:28,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-23 12:59:28,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-11-23 12:59:28,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:59:28,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-23 12:59:28,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:59:28,809 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:59:28,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:59:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 656 proven. 207 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 12:59:32,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:59:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 656 proven. 207 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 12:59:34,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700903495] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:59:34,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:59:34,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32, 32] total 77 [2021-11-23 12:59:34,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961598726] [2021-11-23 12:59:34,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:59:34,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-23 12:59:34,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:59:34,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-23 12:59:34,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=5123, Unknown=0, NotChecked=0, Total=5852 [2021-11-23 12:59:34,629 INFO L87 Difference]: Start difference. First operand 12178 states and 14097 transitions. Second operand has 77 states, 77 states have (on average 4.662337662337662) internal successors, (359), 77 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:35,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:59:35,714 INFO L93 Difference]: Finished difference Result 12977 states and 14966 transitions. [2021-11-23 12:59:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 12:59:35,715 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 4.662337662337662) internal successors, (359), 77 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-11-23 12:59:35,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:59:35,721 INFO L225 Difference]: With dead ends: 12977 [2021-11-23 12:59:35,721 INFO L226 Difference]: Without dead ends: 8332 [2021-11-23 12:59:35,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 315 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1116, Invalid=8586, Unknown=0, NotChecked=0, Total=9702 [2021-11-23 12:59:35,723 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 78 mSDsluCounter, 2148 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2232 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:59:35,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 2232 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 79 Unchecked, 0.0s Time] [2021-11-23 12:59:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8332 states. [2021-11-23 12:59:35,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8332 to 8332. [2021-11-23 12:59:35,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8332 states, 8331 states have (on average 1.1589244988596807) internal successors, (9655), 8331 states have internal predecessors, (9655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:35,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8332 states to 8332 states and 9655 transitions. [2021-11-23 12:59:35,803 INFO L78 Accepts]: Start accepts. Automaton has 8332 states and 9655 transitions. Word has length 167 [2021-11-23 12:59:35,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:59:35,803 INFO L470 AbstractCegarLoop]: Abstraction has 8332 states and 9655 transitions. [2021-11-23 12:59:35,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 4.662337662337662) internal successors, (359), 77 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:35,803 INFO L276 IsEmpty]: Start isEmpty. Operand 8332 states and 9655 transitions. [2021-11-23 12:59:35,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-23 12:59:35,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:59:35,806 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:59:35,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-23 12:59:36,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-11-23 12:59:36,010 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:59:36,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:59:36,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1540750635, now seen corresponding path program 12 times [2021-11-23 12:59:36,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:59:36,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355761598] [2021-11-23 12:59:36,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:59:36,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:59:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:59:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 675 proven. 266 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 12:59:36,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:59:36,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355761598] [2021-11-23 12:59:36,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355761598] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:59:36,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166197141] [2021-11-23 12:59:36,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:59:36,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:59:36,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:59:36,651 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:59:36,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-23 12:59:37,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-23 12:59:37,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:59:37,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-23 12:59:37,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:59:37,181 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 12:59:37,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 12:59:37,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:59:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 698 proven. 243 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 12:59:39,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:59:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 698 proven. 243 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 12:59:40,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166197141] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:59:40,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:59:40,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 72 [2021-11-23 12:59:40,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353931392] [2021-11-23 12:59:40,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:59:40,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-23 12:59:40,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:59:40,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-23 12:59:40,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=879, Invalid=4233, Unknown=0, NotChecked=0, Total=5112 [2021-11-23 12:59:40,250 INFO L87 Difference]: Start difference. First operand 8332 states and 9655 transitions. Second operand has 72 states, 72 states have (on average 5.236111111111111) internal successors, (377), 72 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:41,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:59:41,318 INFO L93 Difference]: Finished difference Result 13916 states and 16060 transitions. [2021-11-23 12:59:41,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-23 12:59:41,318 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 5.236111111111111) internal successors, (377), 72 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-23 12:59:41,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:59:41,325 INFO L225 Difference]: With dead ends: 13916 [2021-11-23 12:59:41,325 INFO L226 Difference]: Without dead ends: 8339 [2021-11-23 12:59:41,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 306 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1509, Invalid=6147, Unknown=0, NotChecked=0, Total=7656 [2021-11-23 12:59:41,326 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 229 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:59:41,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 1371 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 12:59:41,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8339 states. [2021-11-23 12:59:41,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8339 to 8336. [2021-11-23 12:59:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8336 states, 8335 states have (on average 1.1588482303539291) internal successors, (9659), 8335 states have internal predecessors, (9659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:41,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8336 states to 8336 states and 9659 transitions. [2021-11-23 12:59:41,409 INFO L78 Accepts]: Start accepts. Automaton has 8336 states and 9659 transitions. Word has length 174 [2021-11-23 12:59:41,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:59:41,409 INFO L470 AbstractCegarLoop]: Abstraction has 8336 states and 9659 transitions. [2021-11-23 12:59:41,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 5.236111111111111) internal successors, (377), 72 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:41,409 INFO L276 IsEmpty]: Start isEmpty. Operand 8336 states and 9659 transitions. [2021-11-23 12:59:41,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 12:59:41,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:59:41,412 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 12, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:59:41,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-23 12:59:41,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-11-23 12:59:41,613 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 12:59:41,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:59:41,614 INFO L85 PathProgramCache]: Analyzing trace with hash 761983794, now seen corresponding path program 13 times [2021-11-23 12:59:41,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:59:41,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169321722] [2021-11-23 12:59:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:59:41,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:59:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:59:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 26 proven. 960 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 12:59:42,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:59:42,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169321722] [2021-11-23 12:59:42,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169321722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:59:42,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208864980] [2021-11-23 12:59:42,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:59:42,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:59:42,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:59:42,848 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:59:42,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-23 12:59:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:59:43,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 198 conjunts are in the unsatisfiable core [2021-11-23 12:59:43,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:59:43,050 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:59:43,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:59:44,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:59:45,019 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-11-23 12:59:45,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-23 12:59:47,836 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 12:59:47,836 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 22 treesize of output 20 [2021-11-23 12:59:51,365 INFO L354 Elim1Store]: treesize reduction 72, result has 10.0 percent of original size [2021-11-23 12:59:51,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 40 [2021-11-23 12:59:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 26 proven. 966 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 12:59:51,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:59:53,628 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-23 12:59:53,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 214 treesize of output 174 [2021-11-23 12:59:53,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:59:53,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 164 [2021-11-23 12:59:53,756 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 54 treesize of output 50 [2021-11-23 12:59:53,808 INFO L354 Elim1Store]: treesize reduction 9, result has 74.3 percent of original size [2021-11-23 12:59:53,808 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 79 treesize of output 83 [2021-11-23 13:00:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 31 proven. 961 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 13:00:04,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208864980] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:00:04,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:00:04,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 49, 49] total 124 [2021-11-23 13:00:04,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71055215] [2021-11-23 13:00:04,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:00:04,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2021-11-23 13:00:04,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:00:04,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-11-23 13:00:04,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=14701, Unknown=0, NotChecked=0, Total=15252 [2021-11-23 13:00:04,908 INFO L87 Difference]: Start difference. First operand 8336 states and 9659 transitions. Second operand has 124 states, 124 states have (on average 3.5725806451612905) internal successors, (443), 124 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:00:09,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:00:09,968 INFO L93 Difference]: Finished difference Result 10241 states and 11779 transitions. [2021-11-23 13:00:09,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-23 13:00:09,969 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 3.5725806451612905) internal successors, (443), 124 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-23 13:00:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:00:09,977 INFO L225 Difference]: With dead ends: 10241 [2021-11-23 13:00:09,977 INFO L226 Difference]: Without dead ends: 10134 [2021-11-23 13:00:09,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5271 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1071, Invalid=26985, Unknown=0, NotChecked=0, Total=28056 [2021-11-23 13:00:09,979 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 250 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 1936 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 3599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1652 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:00:09,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 1421 Invalid, 3599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1936 Invalid, 0 Unknown, 1652 Unchecked, 1.0s Time] [2021-11-23 13:00:09,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10134 states. [2021-11-23 13:00:10,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10134 to 10001. [2021-11-23 13:00:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10001 states, 10000 states have (on average 1.1525) internal successors, (11525), 10000 states have internal predecessors, (11525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:00:10,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10001 states to 10001 states and 11525 transitions. [2021-11-23 13:00:10,076 INFO L78 Accepts]: Start accepts. Automaton has 10001 states and 11525 transitions. Word has length 178 [2021-11-23 13:00:10,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:00:10,077 INFO L470 AbstractCegarLoop]: Abstraction has 10001 states and 11525 transitions. [2021-11-23 13:00:10,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 3.5725806451612905) internal successors, (443), 124 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:00:10,077 INFO L276 IsEmpty]: Start isEmpty. Operand 10001 states and 11525 transitions. [2021-11-23 13:00:10,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 13:00:10,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:00:10,081 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 12, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:00:10,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-11-23 13:00:10,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62911eaf-8f33-43f2-9292-fcbc8a7875e1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:00:10,281 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-23 13:00:10,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:00:10,282 INFO L85 PathProgramCache]: Analyzing trace with hash -822166384, now seen corresponding path program 14 times [2021-11-23 13:00:10,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:00:10,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233048786] [2021-11-23 13:00:10,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:00:10,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms