./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/strreplace-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_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/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_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/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_480a5952-6c1c-4dd6-ac65-dca330d4636c/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 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:33:39,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:33:39,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:33:39,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:33:39,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:33:39,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:33:39,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:33:39,959 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:33:39,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:33:39,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:33:39,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:33:39,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:33:39,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:33:39,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:33:39,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:33:39,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:33:39,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:33:39,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:33:39,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:33:39,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:33:39,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:33:40,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:33:40,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:33:40,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:33:40,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:33:40,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:33:40,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:33:40,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:33:40,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:33:40,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:33:40,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:33:40,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:33:40,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:33:40,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:33:40,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:33:40,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:33:40,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:33:40,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:33:40,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:33:40,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:33:40,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:33:40,025 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-23 12:33:40,071 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:33:40,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:33:40,072 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:33:40,072 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:33:40,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:33:40,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:33:40,074 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:33:40,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:33:40,074 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:33:40,074 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 12:33:40,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:33:40,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:33:40,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:33:40,075 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 12:33:40,075 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 12:33:40,075 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 12:33:40,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:33:40,076 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 12:33:40,076 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:33:40,077 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:33:40,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:33:40,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:33:40,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:33:40,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:33:40,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:33:40,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:33:40,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:33:40,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:33:40,080 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:33:40,082 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_480a5952-6c1c-4dd6-ac65-dca330d4636c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc [2021-11-23 12:33:40,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:33:40,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:33:40,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:33:40,404 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:33:40,405 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:33:40,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2021-11-23 12:33:40,483 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/data/fc62ca69f/7fbb921a5b1945aa8bde206f2bbac404/FLAG99399f7e3 [2021-11-23 12:33:41,058 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:33:41,066 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2021-11-23 12:33:41,089 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/data/fc62ca69f/7fbb921a5b1945aa8bde206f2bbac404/FLAG99399f7e3 [2021-11-23 12:33:41,326 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/data/fc62ca69f/7fbb921a5b1945aa8bde206f2bbac404 [2021-11-23 12:33:41,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:33:41,330 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:33:41,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:33:41,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:33:41,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:33:41,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:33:41" (1/1) ... [2021-11-23 12:33:41,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aecf65f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:33:41, skipping insertion in model container [2021-11-23 12:33:41,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:33:41" (1/1) ... [2021-11-23 12:33:41,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:33:41,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:33:41,762 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:33:41,773 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:33:41,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:33:41,883 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:33:41,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:33:41 WrapperNode [2021-11-23 12:33:41,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:33:41,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:33:41,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:33:41,886 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:33:41,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:33:41" (1/1) ... [2021-11-23 12:33:41,925 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:33:41" (1/1) ... [2021-11-23 12:33:41,951 INFO L137 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2021-11-23 12:33:41,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:33:41,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:33:41,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:33:41,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:33:41,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:33:41" (1/1) ... [2021-11-23 12:33:41,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:33:41" (1/1) ... [2021-11-23 12:33:41,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:33:41" (1/1) ... [2021-11-23 12:33:41,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:33:41" (1/1) ... [2021-11-23 12:33:41,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:33:41" (1/1) ... [2021-11-23 12:33:41,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:33:41" (1/1) ... [2021-11-23 12:33:41,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:33:41" (1/1) ... [2021-11-23 12:33:41,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:33:41,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:33:41,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:33:41,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:33:41,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:33:41" (1/1) ... [2021-11-23 12:33:42,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:33:42,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:33:42,029 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:33:42,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:33:42,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 12:33:42,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 12:33:42,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 12:33:42,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 12:33:42,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:33:42,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:33:42,152 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:33:42,153 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:33:42,321 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:33:42,328 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:33:42,328 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 12:33:42,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:33:42 BoogieIcfgContainer [2021-11-23 12:33:42,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:33:42,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:33:42,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:33:42,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:33:42,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:33:41" (1/3) ... [2021-11-23 12:33:42,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19516a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:33:42, skipping insertion in model container [2021-11-23 12:33:42,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:33:41" (2/3) ... [2021-11-23 12:33:42,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19516a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:33:42, skipping insertion in model container [2021-11-23 12:33:42,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:33:42" (3/3) ... [2021-11-23 12:33:42,341 INFO L111 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-2.i [2021-11-23 12:33:42,347 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:33:42,347 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-23 12:33:42,396 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:33:42,404 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 12:33:42,404 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-23 12:33:42,418 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 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 12:33:42,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 12:33:42,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:42,426 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 12:33:42,427 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:33:42,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:42,433 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-23 12:33:42,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:42,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024568970] [2021-11-23 12:33:42,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:42,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:42,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:42,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024568970] [2021-11-23 12:33:42,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024568970] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:33:42,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:33:42,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:33:42,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607452532] [2021-11-23 12:33:42,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:33:42,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:33:42,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:42,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:33:42,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:33:42,709 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 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) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:42,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:33:42,784 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2021-11-23 12:33:42,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:33:42,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 12:33:42,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:33:42,796 INFO L225 Difference]: With dead ends: 58 [2021-11-23 12:33:42,796 INFO L226 Difference]: Without dead ends: 54 [2021-11-23 12:33:42,801 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 12:33:42,807 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:33:42,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 60 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:33:42,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-23 12:33:42,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2021-11-23 12:33:42,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:42,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-11-23 12:33:42,853 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2021-11-23 12:33:42,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:33:42,854 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-11-23 12:33:42,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:42,854 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-11-23 12:33:42,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 12:33:42,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:42,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 12:33:42,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:33:42,856 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:33:42,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:42,857 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2021-11-23 12:33:42,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:42,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286994233] [2021-11-23 12:33:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:42,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:42,904 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 12:33:42,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:42,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286994233] [2021-11-23 12:33:42,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286994233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:33:42,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:33:42,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:33:42,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92500130] [2021-11-23 12:33:42,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:33:42,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:33:42,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:42,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:33:42,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:33:42,909 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:42,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:33:42,961 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-11-23 12:33:42,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:33:42,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 12:33:42,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:33:42,963 INFO L225 Difference]: With dead ends: 31 [2021-11-23 12:33:42,963 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 12:33:42,964 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 12:33:42,966 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 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 12:33:42,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:33:42,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 12:33:42,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-23 12:33:42,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:42,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-11-23 12:33:42,973 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 6 [2021-11-23 12:33:42,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:33:42,974 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-11-23 12:33:42,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:42,974 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-11-23 12:33:42,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 12:33:42,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:42,996 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 12:33:42,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:33:42,996 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:33:42,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:42,997 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2021-11-23 12:33:42,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:42,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802557355] [2021-11-23 12:33:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:42,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:43,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:43,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802557355] [2021-11-23 12:33:43,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802557355] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:33:43,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:33:43,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:33:43,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434650486] [2021-11-23 12:33:43,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:33:43,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:33:43,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:43,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:33:43,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:33:43,067 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:43,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:33:43,103 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-11-23 12:33:43,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:33:43,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 12:33:43,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:33:43,105 INFO L225 Difference]: With dead ends: 30 [2021-11-23 12:33:43,105 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 12:33:43,106 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 12:33:43,108 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 20 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 12:33:43,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 20 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:33:43,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 12:33:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-23 12:33:43,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.5) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-11-23 12:33:43,114 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 6 [2021-11-23 12:33:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:33:43,115 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-11-23 12:33:43,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-11-23 12:33:43,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 12:33:43,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:43,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 12:33:43,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 12:33:43,116 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:33:43,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:43,118 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-11-23 12:33:43,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:43,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259590603] [2021-11-23 12:33:43,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:43,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:43,206 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 12:33:43,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:43,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259590603] [2021-11-23 12:33:43,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259590603] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:33:43,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:33:43,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:33:43,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372978601] [2021-11-23 12:33:43,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:33:43,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:33:43,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:43,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:33:43,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:33:43,210 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:43,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:33:43,280 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-11-23 12:33:43,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:33:43,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 12:33:43,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:33:43,282 INFO L225 Difference]: With dead ends: 53 [2021-11-23 12:33:43,282 INFO L226 Difference]: Without dead ends: 53 [2021-11-23 12:33:43,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:33:43,284 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 75 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:33:43,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 48 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:33:43,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-23 12:33:43,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2021-11-23 12:33:43,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:43,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-23 12:33:43,290 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-11-23 12:33:43,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:33:43,291 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-23 12:33:43,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:43,291 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-23 12:33:43,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 12:33:43,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:43,292 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:33:43,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 12:33:43,292 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:33:43,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:43,293 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2021-11-23 12:33:43,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:43,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573590555] [2021-11-23 12:33:43,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:43,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:43,347 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 12:33:43,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:43,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573590555] [2021-11-23 12:33:43,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573590555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:33:43,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:33:43,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:33:43,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779046592] [2021-11-23 12:33:43,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:33:43,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:33:43,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:43,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:33:43,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:33:43,350 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:43,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:33:43,399 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-23 12:33:43,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:33:43,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 12:33:43,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:33:43,402 INFO L225 Difference]: With dead ends: 29 [2021-11-23 12:33:43,403 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 12:33:43,403 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 12:33:43,407 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:33:43,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 24 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:33:43,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 12:33:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-23 12:33:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-23 12:33:43,421 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2021-11-23 12:33:43,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:33:43,422 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-23 12:33:43,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-23 12:33:43,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 12:33:43,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:43,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:33:43,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 12:33:43,427 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:33:43,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:43,428 INFO L85 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2021-11-23 12:33:43,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:43,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633068858] [2021-11-23 12:33:43,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:43,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:43,524 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 12:33:43,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:43,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633068858] [2021-11-23 12:33:43,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633068858] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:33:43,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:33:43,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:33:43,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874747376] [2021-11-23 12:33:43,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:33:43,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:33:43,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:43,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:33:43,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:33:43,527 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:43,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:33:43,585 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-11-23 12:33:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:33:43,586 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 12:33:43,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:33:43,586 INFO L225 Difference]: With dead ends: 40 [2021-11-23 12:33:43,587 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 12:33:43,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:33:43,588 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:33:43,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 33 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:33:43,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 12:33:43,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-11-23 12:33:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:43,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-11-23 12:33:43,593 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 8 [2021-11-23 12:33:43,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:33:43,593 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-11-23 12:33:43,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:43,594 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-11-23 12:33:43,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 12:33:43,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:43,594 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:33:43,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 12:33:43,595 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:33:43,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:43,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-23 12:33:43,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:43,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358257331] [2021-11-23 12:33:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:43,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:43,725 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 12:33:43,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:43,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358257331] [2021-11-23 12:33:43,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358257331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:33:43,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356500640] [2021-11-23 12:33:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:43,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:33:43,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:33:43,728 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:33:43,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:33:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:43,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 12:33:43,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:33:43,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:33:44,034 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 12:33:44,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:33:44,333 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 12:33:44,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356500640] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:33:44,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:33:44,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-23 12:33:44,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147373046] [2021-11-23 12:33:44,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:33:44,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 12:33:44,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:44,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 12:33:44,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:33:44,338 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:44,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:33:44,542 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2021-11-23 12:33:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:33:44,543 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 12:33:44,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:33:44,543 INFO L225 Difference]: With dead ends: 78 [2021-11-23 12:33:44,544 INFO L226 Difference]: Without dead ends: 78 [2021-11-23 12:33:44,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:33:44,545 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 155 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:33:44,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 102 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:33:44,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-23 12:33:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 31. [2021-11-23 12:33:44,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-11-23 12:33:44,550 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 10 [2021-11-23 12:33:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:33:44,550 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-11-23 12:33:44,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-11-23 12:33:44,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 12:33:44,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:44,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:33:44,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:33:44,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:33:44,773 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:33:44,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:44,774 INFO L85 PathProgramCache]: Analyzing trace with hash -204531026, now seen corresponding path program 1 times [2021-11-23 12:33:44,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:44,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981168622] [2021-11-23 12:33:44,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:44,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:44,872 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 12:33:44,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:44,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981168622] [2021-11-23 12:33:44,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981168622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:33:44,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:33:44,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:33:44,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726688791] [2021-11-23 12:33:44,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:33:44,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:33:44,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:44,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:33:44,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:33:44,874 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:44,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:33:44,891 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-11-23 12:33:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:33:44,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 12:33:44,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:33:44,892 INFO L225 Difference]: With dead ends: 30 [2021-11-23 12:33:44,892 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 12:33:44,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 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 12:33:44,894 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:33:44,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:33:44,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 12:33:44,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-23 12:33:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:44,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-23 12:33:44,897 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 12 [2021-11-23 12:33:44,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:33:44,898 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-23 12:33:44,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:44,898 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-23 12:33:44,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 12:33:44,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:44,899 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:33:44,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 12:33:44,899 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:33:44,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:44,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2044161814, now seen corresponding path program 1 times [2021-11-23 12:33:44,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:44,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654705157] [2021-11-23 12:33:44,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:44,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:44,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:44,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654705157] [2021-11-23 12:33:44,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654705157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:33:44,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:33:44,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 12:33:44,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593702981] [2021-11-23 12:33:44,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:33:44,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:33:44,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:44,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:33:44,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:33:44,982 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) 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 12:33:45,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:33:45,066 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-11-23 12:33:45,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:33:45,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) 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 12:33:45,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:33:45,068 INFO L225 Difference]: With dead ends: 31 [2021-11-23 12:33:45,068 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 12:33:45,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:33:45,072 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:33:45,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 90 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:33:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 12:33:45,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-23 12:33:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:45,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-23 12:33:45,086 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2021-11-23 12:33:45,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:33:45,086 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-23 12:33:45,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) 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 12:33:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-23 12:33:45,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 12:33:45,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:45,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:33:45,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 12:33:45,088 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:33:45,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:45,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1343097236, now seen corresponding path program 1 times [2021-11-23 12:33:45,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:45,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072905112] [2021-11-23 12:33:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:45,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:45,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:45,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072905112] [2021-11-23 12:33:45,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072905112] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:33:45,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:33:45,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:33:45,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930927321] [2021-11-23 12:33:45,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:33:45,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:33:45,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:45,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:33:45,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:33:45,235 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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 12:33:45,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:33:45,349 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-11-23 12:33:45,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:33:45,350 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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 12:33:45,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:33:45,351 INFO L225 Difference]: With dead ends: 33 [2021-11-23 12:33:45,351 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 12:33:45,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:33:45,352 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:33:45,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 73 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:33:45,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 12:33:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-11-23 12:33:45,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:45,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-11-23 12:33:45,355 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 13 [2021-11-23 12:33:45,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:33:45,356 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-11-23 12:33:45,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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 12:33:45,356 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-11-23 12:33:45,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 12:33:45,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:45,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:33:45,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 12:33:45,357 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:33:45,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:45,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1914076215, now seen corresponding path program 1 times [2021-11-23 12:33:45,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:45,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950279130] [2021-11-23 12:33:45,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:45,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:45,473 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 12:33:45,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:45,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950279130] [2021-11-23 12:33:45,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950279130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:33:45,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558002785] [2021-11-23 12:33:45,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:45,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:33:45,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:33:45,488 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:33:45,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:33:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:45,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 12:33:45,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:33:45,666 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 12:33:45,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:33:45,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 12:33:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:45,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558002785] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:33:45,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:33:45,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-23 12:33:45,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140805793] [2021-11-23 12:33:45,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:33:45,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 12:33:45,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:45,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 12:33:45,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-11-23 12:33:45,849 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 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 12:33:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:33:46,008 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-11-23 12:33:46,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:33:46,008 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 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) Word has length 17 [2021-11-23 12:33:46,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:33:46,009 INFO L225 Difference]: With dead ends: 36 [2021-11-23 12:33:46,009 INFO L226 Difference]: Without dead ends: 36 [2021-11-23 12:33:46,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-11-23 12:33:46,010 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 153 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:33:46,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 73 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:33:46,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-23 12:33:46,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-11-23 12:33:46,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:46,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-11-23 12:33:46,014 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2021-11-23 12:33:46,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:33:46,014 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-11-23 12:33:46,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 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 12:33:46,015 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-11-23 12:33:46,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 12:33:46,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:46,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:33:46,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:33:46,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 12:33:46,221 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:33:46,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:46,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1668744869, now seen corresponding path program 2 times [2021-11-23 12:33:46,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:46,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772887450] [2021-11-23 12:33:46,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:46,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:46,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:46,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772887450] [2021-11-23 12:33:46,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772887450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:33:46,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403626894] [2021-11-23 12:33:46,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:33:46,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:33:46,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:33:46,433 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:33:46,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 12:33:46,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:33:46,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:33:46,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 12:33:46,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:33:46,562 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 12:33:46,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:33:46,989 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 33 treesize of output 33 [2021-11-23 12:33:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:47,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:33:47,507 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 12:33:47,511 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 12:33:47,520 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 12:33:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:47,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403626894] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:33:47,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:33:47,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2021-11-23 12:33:47,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232571710] [2021-11-23 12:33:47,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:33:47,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 12:33:47,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:47,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 12:33:47,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-11-23 12:33:47,549 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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 12:33:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:33:47,971 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-11-23 12:33:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 12:33:47,972 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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) Word has length 22 [2021-11-23 12:33:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:33:47,972 INFO L225 Difference]: With dead ends: 52 [2021-11-23 12:33:47,972 INFO L226 Difference]: Without dead ends: 49 [2021-11-23 12:33:47,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 12:33:47,974 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:33:47,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 156 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 101 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2021-11-23 12:33:47,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-23 12:33:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2021-11-23 12:33:47,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-11-23 12:33:47,977 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 22 [2021-11-23 12:33:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:33:47,977 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-11-23 12:33:47,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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 12:33:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-11-23 12:33:47,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 12:33:47,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:47,979 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:33:48,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:33:48,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 12:33:48,179 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:33:48,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:48,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1831987682, now seen corresponding path program 1 times [2021-11-23 12:33:48,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:48,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228713759] [2021-11-23 12:33:48,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:48,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:48,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:48,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228713759] [2021-11-23 12:33:48,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228713759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:33:48,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764201231] [2021-11-23 12:33:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:48,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:33:48,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:33:48,399 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:33:48,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 12:33:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:48,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 12:33:48,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:33:48,552 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 12:33:48,675 INFO L354 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-11-23 12:33:48,676 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 28 treesize of output 27 [2021-11-23 12:33:48,756 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-11-23 12:33:48,757 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 24 treesize of output 16 [2021-11-23 12:33:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:48,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:33:48,893 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 12:33:48,902 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 12:33:49,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:49,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764201231] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:33:49,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:33:49,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2021-11-23 12:33:49,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297477816] [2021-11-23 12:33:49,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:33:49,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 12:33:49,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:49,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 12:33:49,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-11-23 12:33:49,046 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 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 12:33:49,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:33:49,349 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-11-23 12:33:49,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 12:33:49,349 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 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) Word has length 24 [2021-11-23 12:33:49,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:33:49,350 INFO L225 Difference]: With dead ends: 50 [2021-11-23 12:33:49,350 INFO L226 Difference]: Without dead ends: 39 [2021-11-23 12:33:49,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-11-23 12:33:49,352 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 59 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:33:49,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 154 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 167 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2021-11-23 12:33:49,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-23 12:33:49,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-11-23 12:33:49,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:49,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-11-23 12:33:49,355 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2021-11-23 12:33:49,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:33:49,355 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-11-23 12:33:49,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 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 12:33:49,356 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-11-23 12:33:49,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 12:33:49,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:49,357 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:33:49,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 12:33:49,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:33:49,558 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:33:49,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:49,558 INFO L85 PathProgramCache]: Analyzing trace with hash -938115935, now seen corresponding path program 2 times [2021-11-23 12:33:49,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:49,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780569780] [2021-11-23 12:33:49,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:49,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:49,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:49,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780569780] [2021-11-23 12:33:49,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780569780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:33:49,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941710285] [2021-11-23 12:33:49,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:33:49,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:33:49,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:33:49,712 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:33:49,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 12:33:49,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:33:49,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:33:49,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 12:33:49,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:33:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:49,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:33:50,137 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 12:33:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:50,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941710285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:33:50,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:33:50,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-11-23 12:33:50,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650598529] [2021-11-23 12:33:50,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:33:50,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 12:33:50,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:50,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 12:33:50,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-11-23 12:33:50,176 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 20 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 12:33:50,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:33:50,348 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-11-23 12:33:50,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 12:33:50,349 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 20 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) Word has length 28 [2021-11-23 12:33:50,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:33:50,350 INFO L225 Difference]: With dead ends: 51 [2021-11-23 12:33:50,350 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 12:33:50,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-11-23 12:33:50,351 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 186 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:33:50,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 88 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:33:50,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 12:33:50,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2021-11-23 12:33:50,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:50,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-23 12:33:50,354 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2021-11-23 12:33:50,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:33:50,354 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-23 12:33:50,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 20 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 12:33:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-23 12:33:50,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 12:33:50,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:50,355 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:33:50,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 12:33:50,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:33:50,565 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:33:50,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:50,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1721723482, now seen corresponding path program 3 times [2021-11-23 12:33:50,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:50,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390015261] [2021-11-23 12:33:50,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:50,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:50,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:50,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390015261] [2021-11-23 12:33:50,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390015261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:33:50,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453225664] [2021-11-23 12:33:50,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:33:50,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:33:50,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:33:50,711 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:33:50,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 12:33:50,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 12:33:50,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:33:50,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 12:33:50,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:33:50,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:33:50,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 12:33:51,170 INFO L354 Elim1Store]: treesize reduction 3, result has 76.9 percent of original size [2021-11-23 12:33:51,170 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 24 [2021-11-23 12:33:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 12:33:51,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:33:51,672 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 12:33:51,676 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 12:33:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 12:33:51,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453225664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:33:51,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:33:51,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 26 [2021-11-23 12:33:51,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519243771] [2021-11-23 12:33:51,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:33:51,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 12:33:51,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:51,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 12:33:51,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-11-23 12:33:51,777 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:52,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:33:52,358 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2021-11-23 12:33:52,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 12:33:52,359 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-23 12:33:52,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:33:52,360 INFO L225 Difference]: With dead ends: 75 [2021-11-23 12:33:52,360 INFO L226 Difference]: Without dead ends: 72 [2021-11-23 12:33:52,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=1763, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 12:33:52,362 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:33:52,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 190 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2021-11-23 12:33:52,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-23 12:33:52,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2021-11-23 12:33:52,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 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 12:33:52,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2021-11-23 12:33:52,366 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 31 [2021-11-23 12:33:52,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:33:52,367 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2021-11-23 12:33:52,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:52,367 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2021-11-23 12:33:52,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 12:33:52,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:52,368 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:33:52,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 12:33:52,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:33:52,581 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:33:52,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:52,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1481717885, now seen corresponding path program 3 times [2021-11-23 12:33:52,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:52,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784135160] [2021-11-23 12:33:52,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:52,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:52,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:52,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784135160] [2021-11-23 12:33:52,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784135160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:33:52,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623645508] [2021-11-23 12:33:52,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:33:52,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:33:52,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:33:52,757 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:33:52,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 12:33:52,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 12:33:52,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:33:52,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 12:33:52,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:33:52,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 12:33:53,146 INFO L354 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-11-23 12:33:53,146 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 12:33:53,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:33:53,462 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 33 treesize of output 33 [2021-11-23 12:33:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:53,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:33:54,064 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 38 treesize of output 36 [2021-11-23 12:33:54,068 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 48 treesize of output 44 [2021-11-23 12:33:54,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-11-23 12:33:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:54,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623645508] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:33:54,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:33:54,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2021-11-23 12:33:54,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769043580] [2021-11-23 12:33:54,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:33:54,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 12:33:54,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:54,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 12:33:54,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-11-23 12:33:54,121 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:55,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:33:55,625 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2021-11-23 12:33:55,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 12:33:55,627 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-23 12:33:55,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:33:55,627 INFO L225 Difference]: With dead ends: 92 [2021-11-23 12:33:55,627 INFO L226 Difference]: Without dead ends: 89 [2021-11-23 12:33:55,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=291, Invalid=1871, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 12:33:55,629 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 98 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:33:55,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 193 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 177 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2021-11-23 12:33:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-23 12:33:55,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 70. [2021-11-23 12:33:55,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 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 12:33:55,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-11-23 12:33:55,638 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 33 [2021-11-23 12:33:55,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:33:55,639 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-11-23 12:33:55,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:55,639 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-11-23 12:33:55,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 12:33:55,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:55,644 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:33:55,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 12:33:55,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 12:33:55,845 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:33:55,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:55,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1204827223, now seen corresponding path program 4 times [2021-11-23 12:33:55,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:55,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938499880] [2021-11-23 12:33:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:55,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:56,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:56,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938499880] [2021-11-23 12:33:56,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938499880] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:33:56,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833068544] [2021-11-23 12:33:56,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:33:56,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:33:56,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:33:56,036 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:33:56,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 12:33:56,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:33:56,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:33:56,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-23 12:33:56,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:33:56,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:33:56,324 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 12:33:56,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:33:56,601 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 24 treesize of output 23 [2021-11-23 12:33:56,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:33:56,682 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-11-23 12:33:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:56,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:33:57,172 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 12:33:57,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 12:33:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:57,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833068544] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:33:57,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:33:57,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 36 [2021-11-23 12:33:57,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003028676] [2021-11-23 12:33:57,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:33:57,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 12:33:57,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:57,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 12:33:57,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 12:33:57,527 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:59,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:33:59,021 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2021-11-23 12:33:59,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 12:33:59,022 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-23 12:33:59,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:33:59,023 INFO L225 Difference]: With dead ends: 106 [2021-11-23 12:33:59,023 INFO L226 Difference]: Without dead ends: 88 [2021-11-23 12:33:59,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=541, Invalid=3365, Unknown=0, NotChecked=0, Total=3906 [2021-11-23 12:33:59,026 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 295 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:33:59,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 265 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 12:33:59,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-23 12:33:59,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2021-11-23 12:33:59,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:59,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2021-11-23 12:33:59,030 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 33 [2021-11-23 12:33:59,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:33:59,030 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2021-11-23 12:33:59,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:59,031 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2021-11-23 12:33:59,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 12:33:59,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:59,032 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:33:59,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 12:33:59,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 12:33:59,256 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:33:59,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:59,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1130414300, now seen corresponding path program 5 times [2021-11-23 12:33:59,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:59,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674143414] [2021-11-23 12:33:59,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:59,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:59,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:59,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674143414] [2021-11-23 12:33:59,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674143414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:33:59,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975488667] [2021-11-23 12:33:59,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:33:59,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:33:59,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:33:59,484 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:33:59,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 12:33:59,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-23 12:33:59,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:33:59,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 12:33:59,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:33:59,703 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 12:33:59,868 INFO L354 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-11-23 12:33:59,869 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 28 treesize of output 27 [2021-11-23 12:33:59,953 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 12:33:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:59,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:00,099 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 15 treesize of output 13 [2021-11-23 12:34:00,101 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 12:34:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:00,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975488667] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:00,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:00,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2021-11-23 12:34:00,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425982363] [2021-11-23 12:34:00,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:00,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 12:34:00,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:00,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 12:34:00,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-11-23 12:34:00,264 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 26 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 12:34:00,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:00,715 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2021-11-23 12:34:00,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 12:34:00,724 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 26 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 42 [2021-11-23 12:34:00,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:00,725 INFO L225 Difference]: With dead ends: 109 [2021-11-23 12:34:00,725 INFO L226 Difference]: Without dead ends: 71 [2021-11-23 12:34:00,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 12:34:00,726 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 106 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:00,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 238 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 291 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2021-11-23 12:34:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-23 12:34:00,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-11-23 12:34:00,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:00,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-11-23 12:34:00,730 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 42 [2021-11-23 12:34:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:00,731 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-11-23 12:34:00,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 26 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 12:34:00,731 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-11-23 12:34:00,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 12:34:00,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:00,739 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:00,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:00,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 12:34:00,953 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:34:00,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:00,953 INFO L85 PathProgramCache]: Analyzing trace with hash -280417561, now seen corresponding path program 6 times [2021-11-23 12:34:00,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:00,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393360480] [2021-11-23 12:34:00,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:00,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:01,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:01,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393360480] [2021-11-23 12:34:01,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393360480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:01,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988856180] [2021-11-23 12:34:01,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:34:01,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:01,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:01,197 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:01,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 12:34:01,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-23 12:34:01,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:01,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 12:34:01,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:01,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:01,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-23 12:34:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:02,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988856180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:02,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:02,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2021-11-23 12:34:02,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799437213] [2021-11-23 12:34:02,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:02,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 12:34:02,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:02,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 12:34:02,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-11-23 12:34:02,043 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 32 states, 31 states have (on average 3.6774193548387095) internal successors, (114), 32 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:02,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:02,416 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2021-11-23 12:34:02,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 12:34:02,417 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.6774193548387095) internal successors, (114), 32 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-23 12:34:02,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:02,418 INFO L225 Difference]: With dead ends: 92 [2021-11-23 12:34:02,418 INFO L226 Difference]: Without dead ends: 92 [2021-11-23 12:34:02,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=305, Invalid=1177, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 12:34:02,419 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 312 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:02,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 243 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:34:02,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-23 12:34:02,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-11-23 12:34:02,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.139240506329114) internal successors, (90), 79 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:02,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2021-11-23 12:34:02,423 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 46 [2021-11-23 12:34:02,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:02,424 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2021-11-23 12:34:02,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.6774193548387095) internal successors, (114), 32 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:02,424 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2021-11-23 12:34:02,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 12:34:02,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:02,425 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:02,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:02,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:02,644 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:34:02,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:02,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1795888381, now seen corresponding path program 7 times [2021-11-23 12:34:02,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:02,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130329824] [2021-11-23 12:34:02,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:02,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:02,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:02,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130329824] [2021-11-23 12:34:02,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130329824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:02,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325011463] [2021-11-23 12:34:02,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:34:02,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:02,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:02,968 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:02,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 12:34:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:03,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 12:34:03,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:03,228 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 12:34:03,368 INFO L354 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-11-23 12:34:03,369 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 28 treesize of output 27 [2021-11-23 12:34:03,457 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 12:34:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:03,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:03,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:34:03,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 12:34:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:03,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325011463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:03,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:03,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 29 [2021-11-23 12:34:03,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506916153] [2021-11-23 12:34:03,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:03,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 12:34:03,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:03,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 12:34:03,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-11-23 12:34:03,802 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:04,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:04,377 INFO L93 Difference]: Finished difference Result 137 states and 153 transitions. [2021-11-23 12:34:04,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 12:34:04,377 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-23 12:34:04,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:04,378 INFO L225 Difference]: With dead ends: 137 [2021-11-23 12:34:04,378 INFO L226 Difference]: Without dead ends: 87 [2021-11-23 12:34:04,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 12:34:04,380 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 118 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:04,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 425 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 518 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2021-11-23 12:34:04,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-23 12:34:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2021-11-23 12:34:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-11-23 12:34:04,383 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 51 [2021-11-23 12:34:04,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:04,384 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-11-23 12:34:04,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:04,384 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-11-23 12:34:04,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 12:34:04,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:04,385 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:04,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:04,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-23 12:34:04,585 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:34:04,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:04,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1521830758, now seen corresponding path program 8 times [2021-11-23 12:34:04,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:04,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566746839] [2021-11-23 12:34:04,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:04,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:04,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:04,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566746839] [2021-11-23 12:34:04,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566746839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:04,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32374305] [2021-11-23 12:34:04,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:34:04,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:04,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:04,870 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:04,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 12:34:04,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:34:04,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:04,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 12:34:04,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:05,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:05,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 12:34:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:05,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32374305] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:05,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:05,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2021-11-23 12:34:05,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834691015] [2021-11-23 12:34:05,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:05,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 12:34:05,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:05,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 12:34:05,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-11-23 12:34:05,654 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 32 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:06,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:06,069 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2021-11-23 12:34:06,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 12:34:06,070 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-23 12:34:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:06,071 INFO L225 Difference]: With dead ends: 108 [2021-11-23 12:34:06,071 INFO L226 Difference]: Without dead ends: 108 [2021-11-23 12:34:06,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=306, Invalid=1254, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 12:34:06,073 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 468 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:06,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 318 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:34:06,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-23 12:34:06,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 96. [2021-11-23 12:34:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 95 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:06,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2021-11-23 12:34:06,078 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 55 [2021-11-23 12:34:06,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:06,078 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2021-11-23 12:34:06,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:06,079 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2021-11-23 12:34:06,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 12:34:06,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:06,080 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:06,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:06,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:06,296 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:34:06,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:06,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1191879466, now seen corresponding path program 9 times [2021-11-23 12:34:06,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:06,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692935918] [2021-11-23 12:34:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:06,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:06,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:06,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692935918] [2021-11-23 12:34:06,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692935918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:06,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415031960] [2021-11-23 12:34:06,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:34:06,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:06,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:06,637 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:06,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 12:34:06,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 12:34:06,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:06,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-23 12:34:06,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:06,968 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 12:34:07,114 INFO L354 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-11-23 12:34:07,114 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 28 treesize of output 27 [2021-11-23 12:34:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:07,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:07,499 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 12:34:07,501 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 12:34:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:07,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415031960] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:07,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:07,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 33 [2021-11-23 12:34:07,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459611759] [2021-11-23 12:34:07,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:07,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 12:34:07,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:07,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 12:34:07,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 12:34:07,656 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:08,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:08,694 INFO L93 Difference]: Finished difference Result 186 states and 208 transitions. [2021-11-23 12:34:08,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 12:34:08,697 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-23 12:34:08,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:08,698 INFO L225 Difference]: With dead ends: 186 [2021-11-23 12:34:08,698 INFO L226 Difference]: Without dead ends: 103 [2021-11-23 12:34:08,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=318, Invalid=2438, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 12:34:08,699 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 263 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:08,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 644 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 883 Invalid, 0 Unknown, 50 Unchecked, 0.5s Time] [2021-11-23 12:34:08,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-23 12:34:08,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-11-23 12:34:08,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 99 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:08,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2021-11-23 12:34:08,704 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 60 [2021-11-23 12:34:08,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:08,704 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2021-11-23 12:34:08,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:08,704 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2021-11-23 12:34:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 12:34:08,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:08,705 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:08,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-23 12:34:08,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:08,917 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:34:08,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:08,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1846000595, now seen corresponding path program 10 times [2021-11-23 12:34:08,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:08,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771321671] [2021-11-23 12:34:08,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:08,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:09,235 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 28 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:09,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:09,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771321671] [2021-11-23 12:34:09,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771321671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:09,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570174045] [2021-11-23 12:34:09,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:34:09,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:09,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:09,241 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:09,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 12:34:09,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:34:09,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:09,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-23 12:34:09,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 45 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:09,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:10,107 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 12:34:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 45 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:10,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570174045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:10,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:10,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2021-11-23 12:34:10,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100250136] [2021-11-23 12:34:10,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:10,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 12:34:10,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:10,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 12:34:10,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 12:34:10,175 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand has 36 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 36 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:10,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:10,657 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2021-11-23 12:34:10,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 12:34:10,658 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 36 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-23 12:34:10,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:10,659 INFO L225 Difference]: With dead ends: 124 [2021-11-23 12:34:10,659 INFO L226 Difference]: Without dead ends: 124 [2021-11-23 12:34:10,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 12:34:10,661 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 379 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:10,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 396 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:34:10,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-23 12:34:10,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 112. [2021-11-23 12:34:10,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.135135135135135) internal successors, (126), 111 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2021-11-23 12:34:10,664 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 64 [2021-11-23 12:34:10,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:10,665 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2021-11-23 12:34:10,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 36 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2021-11-23 12:34:10,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 12:34:10,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:10,666 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:10,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:10,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 12:34:10,884 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:34:10,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:10,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1045878647, now seen corresponding path program 11 times [2021-11-23 12:34:10,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:10,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074607306] [2021-11-23 12:34:10,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:10,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:10,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:11,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:11,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074607306] [2021-11-23 12:34:11,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074607306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:11,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597924223] [2021-11-23 12:34:11,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:34:11,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:11,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:11,318 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:11,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 12:34:11,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-23 12:34:11,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:11,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-23 12:34:11,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:11,704 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 12:34:11,867 INFO L354 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-11-23 12:34:11,868 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 28 treesize of output 27 [2021-11-23 12:34:12,013 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 12:34:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:12,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:12,188 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 12:34:12,189 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 12:34:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:12,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597924223] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:12,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:12,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 37 [2021-11-23 12:34:12,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094172590] [2021-11-23 12:34:12,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:12,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 12:34:12,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:12,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 12:34:12,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 12:34:12,399 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:13,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:13,639 INFO L93 Difference]: Finished difference Result 220 states and 247 transitions. [2021-11-23 12:34:13,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 12:34:13,640 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have 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 12:34:13,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:13,641 INFO L225 Difference]: With dead ends: 220 [2021-11-23 12:34:13,641 INFO L226 Difference]: Without dead ends: 119 [2021-11-23 12:34:13,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=357, Invalid=3183, Unknown=0, NotChecked=0, Total=3540 [2021-11-23 12:34:13,643 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 329 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:13,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 875 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1240 Invalid, 0 Unknown, 59 Unchecked, 0.6s Time] [2021-11-23 12:34:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-23 12:34:13,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2021-11-23 12:34:13,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.1304347826086956) internal successors, (130), 115 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:13,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2021-11-23 12:34:13,647 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 69 [2021-11-23 12:34:13,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:13,647 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2021-11-23 12:34:13,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:13,648 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2021-11-23 12:34:13,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 12:34:13,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:13,649 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:13,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:13,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-23 12:34:13,857 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:34:13,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:13,857 INFO L85 PathProgramCache]: Analyzing trace with hash -83187244, now seen corresponding path program 12 times [2021-11-23 12:34:13,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:13,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979660498] [2021-11-23 12:34:13,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:13,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 45 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:14,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:14,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979660498] [2021-11-23 12:34:14,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979660498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:14,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100799547] [2021-11-23 12:34:14,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:34:14,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:14,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:14,153 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:14,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 12:34:14,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-23 12:34:14,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:14,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 12:34:14,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:14,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:34:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 66 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:14,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:15,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100799547] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:15,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:15,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2021-11-23 12:34:15,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165253939] [2021-11-23 12:34:15,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:15,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-23 12:34:15,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:15,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-23 12:34:15,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=2351, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 12:34:15,884 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 53 states, 52 states have (on average 4.096153846153846) internal successors, (213), 53 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:16,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:16,485 INFO L93 Difference]: Finished difference Result 140 states and 158 transitions. [2021-11-23 12:34:16,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 12:34:16,486 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 4.096153846153846) internal successors, (213), 53 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-23 12:34:16,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:16,487 INFO L225 Difference]: With dead ends: 140 [2021-11-23 12:34:16,487 INFO L226 Difference]: Without dead ends: 140 [2021-11-23 12:34:16,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=776, Invalid=3130, Unknown=0, NotChecked=0, Total=3906 [2021-11-23 12:34:16,489 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 714 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:16,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 387 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:34:16,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-23 12:34:16,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2021-11-23 12:34:16,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 127 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 144 transitions. [2021-11-23 12:34:16,494 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 144 transitions. Word has length 73 [2021-11-23 12:34:16,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:16,494 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 144 transitions. [2021-11-23 12:34:16,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 4.096153846153846) internal successors, (213), 53 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:16,495 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 144 transitions. [2021-11-23 12:34:16,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 12:34:16,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:16,496 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:16,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:16,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-23 12:34:16,709 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:34:16,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:16,709 INFO L85 PathProgramCache]: Analyzing trace with hash 653582896, now seen corresponding path program 13 times [2021-11-23 12:34:16,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:16,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657099924] [2021-11-23 12:34:16,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:16,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:17,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:17,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657099924] [2021-11-23 12:34:17,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657099924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:17,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373876552] [2021-11-23 12:34:17,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:34:17,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:17,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:17,281 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:17,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 12:34:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:17,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-23 12:34:17,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:17,657 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 21 treesize of output 17 [2021-11-23 12:34:17,840 INFO L354 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-11-23 12:34:17,840 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 28 treesize of output 27 [2021-11-23 12:34:17,957 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 12:34:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:17,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:18,201 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 12:34:18,203 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 12:34:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:18,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373876552] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:18,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:18,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 40 [2021-11-23 12:34:18,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734933624] [2021-11-23 12:34:18,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:18,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-23 12:34:18,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:18,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-23 12:34:18,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1449, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 12:34:18,451 INFO L87 Difference]: Start difference. First operand 128 states and 144 transitions. Second operand has 40 states, 40 states have (on average 3.275) internal successors, (131), 40 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:19,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:19,818 INFO L93 Difference]: Finished difference Result 254 states and 286 transitions. [2021-11-23 12:34:19,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-23 12:34:19,819 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.275) internal successors, (131), 40 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-23 12:34:19,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:19,820 INFO L225 Difference]: With dead ends: 254 [2021-11-23 12:34:19,820 INFO L226 Difference]: Without dead ends: 135 [2021-11-23 12:34:19,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 136 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=394, Invalid=3896, Unknown=0, NotChecked=0, Total=4290 [2021-11-23 12:34:19,823 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 383 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:19,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 937 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1320 Invalid, 0 Unknown, 68 Unchecked, 0.6s Time] [2021-11-23 12:34:19,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-23 12:34:19,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2021-11-23 12:34:19,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.1297709923664123) internal successors, (148), 131 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:19,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 148 transitions. [2021-11-23 12:34:19,828 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 148 transitions. Word has length 78 [2021-11-23 12:34:19,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:19,828 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 148 transitions. [2021-11-23 12:34:19,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.275) internal successors, (131), 40 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:19,830 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 148 transitions. [2021-11-23 12:34:19,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 12:34:19,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:19,831 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:19,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:20,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-23 12:34:20,041 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:34:20,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:20,041 INFO L85 PathProgramCache]: Analyzing trace with hash 18573427, now seen corresponding path program 14 times [2021-11-23 12:34:20,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:20,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236147959] [2021-11-23 12:34:20,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:20,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 66 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:20,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:20,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236147959] [2021-11-23 12:34:20,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236147959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:20,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955694644] [2021-11-23 12:34:20,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:34:20,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:20,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:20,418 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:20,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 12:34:20,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:34:20,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:20,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-23 12:34:20,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 91 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:21,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:21,562 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 12:34:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 91 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:21,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955694644] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:21,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:21,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 43 [2021-11-23 12:34:21,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610092159] [2021-11-23 12:34:21,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:21,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 12:34:21,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:21,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 12:34:21,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 12:34:21,662 INFO L87 Difference]: Start difference. First operand 132 states and 148 transitions. Second operand has 44 states, 43 states have (on average 3.953488372093023) internal successors, (170), 44 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:22,345 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2021-11-23 12:34:22,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 12:34:22,347 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.953488372093023) internal successors, (170), 44 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-23 12:34:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:22,348 INFO L225 Difference]: With dead ends: 156 [2021-11-23 12:34:22,348 INFO L226 Difference]: Without dead ends: 156 [2021-11-23 12:34:22,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=558, Invalid=2412, Unknown=0, NotChecked=0, Total=2970 [2021-11-23 12:34:22,350 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 556 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:22,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 616 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 12:34:22,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-23 12:34:22,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 144. [2021-11-23 12:34:22,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.132867132867133) internal successors, (162), 143 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 162 transitions. [2021-11-23 12:34:22,354 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 162 transitions. Word has length 82 [2021-11-23 12:34:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:22,354 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 162 transitions. [2021-11-23 12:34:22,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.953488372093023) internal successors, (170), 44 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:22,355 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 162 transitions. [2021-11-23 12:34:22,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-23 12:34:22,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:22,356 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:22,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:22,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-23 12:34:22,556 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:34:22,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:22,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1292013839, now seen corresponding path program 15 times [2021-11-23 12:34:22,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:22,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645935707] [2021-11-23 12:34:22,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:22,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 33 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:23,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:23,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645935707] [2021-11-23 12:34:23,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645935707] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:23,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444649408] [2021-11-23 12:34:23,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:34:23,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:23,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:23,035 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:23,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 12:34:23,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-23 12:34:23,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:23,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-23 12:34:23,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:23,523 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 12:34:23,690 INFO L354 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-11-23 12:34:23,690 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 28 treesize of output 27 [2021-11-23 12:34:23,845 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 12:34:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 33 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:23,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:24,055 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 12:34:24,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 12:34:24,281 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 33 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:24,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444649408] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:24,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:24,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 43 [2021-11-23 12:34:24,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169455297] [2021-11-23 12:34:24,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:24,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-23 12:34:24,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:24,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-23 12:34:24,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1688, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 12:34:24,284 INFO L87 Difference]: Start difference. First operand 144 states and 162 transitions. Second operand has 43 states, 43 states have (on average 3.3488372093023258) internal successors, (144), 43 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:25,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:25,932 INFO L93 Difference]: Finished difference Result 288 states and 325 transitions. [2021-11-23 12:34:25,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-23 12:34:25,933 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.3488372093023258) internal successors, (144), 43 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-23 12:34:25,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:25,934 INFO L225 Difference]: With dead ends: 288 [2021-11-23 12:34:25,934 INFO L226 Difference]: Without dead ends: 151 [2021-11-23 12:34:25,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=431, Invalid=4681, Unknown=0, NotChecked=0, Total=5112 [2021-11-23 12:34:25,936 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 310 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 1754 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:25,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 1193 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1754 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 12:34:25,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-23 12:34:25,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2021-11-23 12:34:25,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.129251700680272) internal successors, (166), 147 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:25,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 166 transitions. [2021-11-23 12:34:25,941 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 166 transitions. Word has length 87 [2021-11-23 12:34:25,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:25,941 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 166 transitions. [2021-11-23 12:34:25,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.3488372093023258) internal successors, (144), 43 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:25,953 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 166 transitions. [2021-11-23 12:34:25,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 12:34:25,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:25,958 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:25,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:26,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-23 12:34:26,159 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:34:26,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:26,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1141261326, now seen corresponding path program 16 times [2021-11-23 12:34:26,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:26,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488418895] [2021-11-23 12:34:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:26,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:26,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:26,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488418895] [2021-11-23 12:34:26,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488418895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:26,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299723745] [2021-11-23 12:34:26,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:34:26,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:26,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:26,645 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:26,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 12:34:26,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:34:26,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:26,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-23 12:34:26,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 120 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:27,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:27,997 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 5 treesize of output 3 [2021-11-23 12:34:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 120 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:28,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299723745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:28,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:28,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 47 [2021-11-23 12:34:28,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550161166] [2021-11-23 12:34:28,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:28,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 12:34:28,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:28,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 12:34:28,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1974, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 12:34:28,117 INFO L87 Difference]: Start difference. First operand 148 states and 166 transitions. Second operand has 48 states, 47 states have (on average 4.0) internal successors, (188), 48 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:28,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:28,870 INFO L93 Difference]: Finished difference Result 172 states and 194 transitions. [2021-11-23 12:34:28,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 12:34:28,871 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.0) internal successors, (188), 48 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-23 12:34:28,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:28,872 INFO L225 Difference]: With dead ends: 172 [2021-11-23 12:34:28,872 INFO L226 Difference]: Without dead ends: 172 [2021-11-23 12:34:28,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=660, Invalid=2880, Unknown=0, NotChecked=0, Total=3540 [2021-11-23 12:34:28,874 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 634 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:28,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 725 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 12:34:28,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-23 12:34:28,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 160. [2021-11-23 12:34:28,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.1320754716981132) internal successors, (180), 159 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:28,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 180 transitions. [2021-11-23 12:34:28,879 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 180 transitions. Word has length 91 [2021-11-23 12:34:28,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:28,880 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 180 transitions. [2021-11-23 12:34:28,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.0) internal successors, (188), 48 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:28,880 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 180 transitions. [2021-11-23 12:34:28,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-23 12:34:28,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:28,882 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:28,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:29,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-23 12:34:29,097 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:34:29,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:29,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1881316406, now seen corresponding path program 17 times [2021-11-23 12:34:29,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:29,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985658567] [2021-11-23 12:34:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:29,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:29,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:29,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985658567] [2021-11-23 12:34:29,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985658567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:29,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522811786] [2021-11-23 12:34:29,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:34:29,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:29,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:29,649 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:29,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 12:34:29,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-23 12:34:29,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:29,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-23 12:34:29,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:30,204 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 12:34:30,363 INFO L354 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-11-23 12:34:30,364 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 28 treesize of output 27 [2021-11-23 12:34:30,502 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 12:34:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:30,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:30,729 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 12:34:30,739 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 26 treesize of output 22 [2021-11-23 12:34:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:30,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522811786] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:30,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:30,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 44 [2021-11-23 12:34:30,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274550867] [2021-11-23 12:34:30,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:30,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 12:34:30,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:30,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 12:34:30,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1773, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 12:34:30,967 INFO L87 Difference]: Start difference. First operand 160 states and 180 transitions. Second operand has 44 states, 44 states have (on average 3.5681818181818183) internal successors, (157), 44 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:32,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:32,746 INFO L93 Difference]: Finished difference Result 322 states and 364 transitions. [2021-11-23 12:34:32,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-23 12:34:32,747 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.5681818181818183) internal successors, (157), 44 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-23 12:34:32,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:32,748 INFO L225 Difference]: With dead ends: 322 [2021-11-23 12:34:32,748 INFO L226 Difference]: Without dead ends: 167 [2021-11-23 12:34:32,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 170 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=460, Invalid=5240, Unknown=0, NotChecked=0, Total=5700 [2021-11-23 12:34:32,754 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 389 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:32,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 1492 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2002 Invalid, 0 Unknown, 149 Unchecked, 0.9s Time] [2021-11-23 12:34:32,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-23 12:34:32,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2021-11-23 12:34:32,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1288343558282208) internal successors, (184), 163 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 184 transitions. [2021-11-23 12:34:32,768 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 184 transitions. Word has length 96 [2021-11-23 12:34:32,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:32,768 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 184 transitions. [2021-11-23 12:34:32,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.5681818181818183) internal successors, (157), 44 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 184 transitions. [2021-11-23 12:34:32,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 12:34:32,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:32,770 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:32,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-23 12:34:32,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:32,984 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:34:32,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:32,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1334523833, now seen corresponding path program 18 times [2021-11-23 12:34:32,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:32,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495698688] [2021-11-23 12:34:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:32,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 120 proven. 305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:33,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:33,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495698688] [2021-11-23 12:34:33,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495698688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:33,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707166259] [2021-11-23 12:34:33,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:34:33,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:33,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:33,468 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:33,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 12:34:33,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-23 12:34:33,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:33,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-23 12:34:33,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 153 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:34,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:35,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-23 12:34:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 153 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:35,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707166259] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:35,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:35,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 61 [2021-11-23 12:34:35,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129458490] [2021-11-23 12:34:35,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:35,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-23 12:34:35,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:35,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-23 12:34:35,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=3215, Unknown=0, NotChecked=0, Total=3782 [2021-11-23 12:34:35,189 INFO L87 Difference]: Start difference. First operand 164 states and 184 transitions. Second operand has 62 states, 61 states have (on average 4.131147540983607) internal successors, (252), 62 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:35,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:35,900 INFO L93 Difference]: Finished difference Result 188 states and 212 transitions. [2021-11-23 12:34:35,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 12:34:35,901 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 4.131147540983607) internal successors, (252), 62 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-23 12:34:35,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:35,902 INFO L225 Difference]: With dead ends: 188 [2021-11-23 12:34:35,902 INFO L226 Difference]: Without dead ends: 188 [2021-11-23 12:34:35,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1091, Invalid=4459, Unknown=0, NotChecked=0, Total=5550 [2021-11-23 12:34:35,903 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 1442 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1442 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:35,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1442 Valid, 566 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 12:34:35,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-23 12:34:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 176. [2021-11-23 12:34:35,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.1314285714285715) internal successors, (198), 175 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 12:34:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 198 transitions. [2021-11-23 12:34:35,907 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 198 transitions. Word has length 100 [2021-11-23 12:34:35,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:35,907 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 198 transitions. [2021-11-23 12:34:35,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 4.131147540983607) internal successors, (252), 62 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 198 transitions. [2021-11-23 12:34:35,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 12:34:35,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:35,909 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:35,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-23 12:34:36,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:36,122 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:34:36,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:36,123 INFO L85 PathProgramCache]: Analyzing trace with hash -997573781, now seen corresponding path program 19 times [2021-11-23 12:34:36,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:36,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693715853] [2021-11-23 12:34:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:36,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:36,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:36,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693715853] [2021-11-23 12:34:36,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693715853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:36,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027808408] [2021-11-23 12:34:36,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:34:36,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:36,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:36,711 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:36,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 12:34:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:36,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-23 12:34:36,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:37,195 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 12:34:37,376 INFO L354 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-11-23 12:34:37,377 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 28 treesize of output 27 [2021-11-23 12:34:37,526 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 12:34:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:37,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:37,766 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 12:34:37,768 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 12:34:37,988 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:37,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027808408] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:37,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:37,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 47 [2021-11-23 12:34:37,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505189449] [2021-11-23 12:34:37,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:37,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-23 12:34:37,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:37,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-23 12:34:37,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2036, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 12:34:37,990 INFO L87 Difference]: Start difference. First operand 176 states and 198 transitions. Second operand has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:40,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:40,130 INFO L93 Difference]: Finished difference Result 356 states and 403 transitions. [2021-11-23 12:34:40,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-23 12:34:40,130 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-23 12:34:40,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:40,132 INFO L225 Difference]: With dead ends: 356 [2021-11-23 12:34:40,132 INFO L226 Difference]: Without dead ends: 183 [2021-11-23 12:34:40,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 187 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=497, Invalid=6145, Unknown=0, NotChecked=0, Total=6642 [2021-11-23 12:34:40,133 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 533 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1813 SdHoareTripleChecker+Invalid, 2824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:40,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 1813 Invalid, 2824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2533 Invalid, 0 Unknown, 102 Unchecked, 1.0s Time] [2021-11-23 12:34:40,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-23 12:34:40,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2021-11-23 12:34:40,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.1284916201117319) internal successors, (202), 179 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 12:34:40,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 202 transitions. [2021-11-23 12:34:40,138 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 202 transitions. Word has length 105 [2021-11-23 12:34:40,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:40,138 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 202 transitions. [2021-11-23 12:34:40,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:40,139 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 202 transitions. [2021-11-23 12:34:40,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-23 12:34:40,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:40,140 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:40,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:40,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-23 12:34:40,340 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:34:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:40,341 INFO L85 PathProgramCache]: Analyzing trace with hash 859104072, now seen corresponding path program 20 times [2021-11-23 12:34:40,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:40,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869468675] [2021-11-23 12:34:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:40,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 153 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:40,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:40,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869468675] [2021-11-23 12:34:40,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869468675] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:40,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245540781] [2021-11-23 12:34:40,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:34:40,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:40,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:40,876 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:40,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 12:34:40,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:34:40,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:40,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-23 12:34:40,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:40,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:34:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 190 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:42,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 231 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:43,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245540781] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:43,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:43,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 75 [2021-11-23 12:34:43,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162197282] [2021-11-23 12:34:43,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:43,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-23 12:34:43,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:43,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-23 12:34:43,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=4989, Unknown=0, NotChecked=0, Total=5700 [2021-11-23 12:34:43,606 INFO L87 Difference]: Start difference. First operand 180 states and 202 transitions. Second operand has 76 states, 75 states have (on average 4.213333333333333) internal successors, (316), 76 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:44,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:44,723 INFO L93 Difference]: Finished difference Result 204 states and 230 transitions. [2021-11-23 12:34:44,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 12:34:44,724 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 4.213333333333333) internal successors, (316), 76 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have 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 12:34:44,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:44,725 INFO L225 Difference]: With dead ends: 204 [2021-11-23 12:34:44,725 INFO L226 Difference]: Without dead ends: 204 [2021-11-23 12:34:44,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1372, Invalid=6638, Unknown=0, NotChecked=0, Total=8010 [2021-11-23 12:34:44,730 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 1183 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1183 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:44,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1183 Valid, 1258 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1860 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 12:34:44,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-23 12:34:44,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 192. [2021-11-23 12:34:44,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.130890052356021) internal successors, (216), 191 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:44,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 216 transitions. [2021-11-23 12:34:44,738 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 216 transitions. Word has length 109 [2021-11-23 12:34:44,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:44,738 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 216 transitions. [2021-11-23 12:34:44,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 4.213333333333333) internal successors, (316), 76 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:44,739 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 216 transitions. [2021-11-23 12:34:44,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 12:34:44,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:44,741 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:44,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:44,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-23 12:34:44,969 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:34:44,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:44,969 INFO L85 PathProgramCache]: Analyzing trace with hash -2093452996, now seen corresponding path program 21 times [2021-11-23 12:34:44,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:44,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895013021] [2021-11-23 12:34:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:44,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:45,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:45,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895013021] [2021-11-23 12:34:45,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895013021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:45,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350432754] [2021-11-23 12:34:45,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:34:45,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:45,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:45,714 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:45,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 12:34:46,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-23 12:34:46,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:46,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-23 12:34:46,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:46,540 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 12:34:46,694 INFO L354 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-11-23 12:34:46,694 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 28 treesize of output 27 [2021-11-23 12:34:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:46,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:47,181 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 13 [2021-11-23 12:34:47,188 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 12:34:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:47,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350432754] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:47,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:47,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 51 [2021-11-23 12:34:47,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085994344] [2021-11-23 12:34:47,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:47,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 12:34:47,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:47,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 12:34:47,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2413, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 12:34:47,469 INFO L87 Difference]: Start difference. First operand 192 states and 216 transitions. Second operand has 51 states, 51 states have (on average 3.627450980392157) internal successors, (185), 51 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:49,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:49,542 INFO L93 Difference]: Finished difference Result 333 states and 377 transitions. [2021-11-23 12:34:49,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-23 12:34:49,543 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.627450980392157) internal successors, (185), 51 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have 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 12:34:49,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:49,544 INFO L225 Difference]: With dead ends: 333 [2021-11-23 12:34:49,544 INFO L226 Difference]: Without dead ends: 199 [2021-11-23 12:34:49,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 203 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=369, Invalid=5637, Unknown=0, NotChecked=0, Total=6006 [2021-11-23 12:34:49,545 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 210 mSDsluCounter, 1912 mSDsCounter, 0 mSdLazyCounter, 2692 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 2928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:49,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1972 Invalid, 2928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2692 Invalid, 0 Unknown, 166 Unchecked, 1.1s Time] [2021-11-23 12:34:49,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-23 12:34:49,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2021-11-23 12:34:49,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.1282051282051282) internal successors, (220), 195 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:49,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 220 transitions. [2021-11-23 12:34:49,550 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 220 transitions. Word has length 114 [2021-11-23 12:34:49,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:49,550 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 220 transitions. [2021-11-23 12:34:49,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.627450980392157) internal successors, (185), 51 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:49,551 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 220 transitions. [2021-11-23 12:34:49,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 12:34:49,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:49,551 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:49,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:49,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:49,752 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:34:49,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:49,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1073720833, now seen corresponding path program 22 times [2021-11-23 12:34:49,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:49,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058428850] [2021-11-23 12:34:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:49,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 190 proven. 428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:50,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:50,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058428850] [2021-11-23 12:34:50,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058428850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:50,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69860592] [2021-11-23 12:34:50,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:34:50,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:50,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:50,396 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:50,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 12:34:50,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:34:50,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:50,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-23 12:34:50,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:50,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:34:50,754 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 12:34:50,864 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-23 12:34:50,865 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 23 treesize of output 30 [2021-11-23 12:34:52,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:34:52,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 12:34:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 235 proven. 107 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-23 12:34:52,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:56,066 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 39 treesize of output 37 [2021-11-23 12:34:56,069 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 68 treesize of output 66 [2021-11-23 12:34:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 265 proven. 77 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-23 12:34:56,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69860592] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:56,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:56,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20, 20] total 64 [2021-11-23 12:34:56,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40630884] [2021-11-23 12:34:56,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:56,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-23 12:34:56,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:56,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-23 12:34:56,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=558, Invalid=3601, Unknown=1, NotChecked=0, Total=4160 [2021-11-23 12:34:56,800 INFO L87 Difference]: Start difference. First operand 196 states and 220 transitions. Second operand has 65 states, 64 states have (on average 4.0) internal successors, (256), 65 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:58,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:58,695 INFO L93 Difference]: Finished difference Result 207 states and 233 transitions. [2021-11-23 12:34:58,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-23 12:34:58,696 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 4.0) internal successors, (256), 65 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-23 12:34:58,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:58,696 INFO L225 Difference]: With dead ends: 207 [2021-11-23 12:34:58,696 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 12:34:58,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 199 SyntacticMatches, 15 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1329, Invalid=5312, Unknown=1, NotChecked=0, Total=6642 [2021-11-23 12:34:58,697 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 1028 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:58,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1028 Valid, 1061 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1298 Invalid, 0 Unknown, 125 Unchecked, 0.7s Time] [2021-11-23 12:34:58,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 12:34:58,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 12:34:58,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:58,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 12:34:58,698 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 118 [2021-11-23 12:34:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:58,699 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 12:34:58,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 4.0) internal successors, (256), 65 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:58,699 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 12:34:58,699 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 12:34:58,702 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (10 of 11 remaining) [2021-11-23 12:34:58,703 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (9 of 11 remaining) [2021-11-23 12:34:58,703 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (8 of 11 remaining) [2021-11-23 12:34:58,703 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (7 of 11 remaining) [2021-11-23 12:34:58,703 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (6 of 11 remaining) [2021-11-23 12:34:58,704 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (5 of 11 remaining) [2021-11-23 12:34:58,704 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (4 of 11 remaining) [2021-11-23 12:34:58,704 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (3 of 11 remaining) [2021-11-23 12:34:58,704 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION (2 of 11 remaining) [2021-11-23 12:34:58,704 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (1 of 11 remaining) [2021-11-23 12:34:58,704 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2021-11-23 12:34:58,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:58,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:58,907 INFO L732 BasicCegarLoop]: Path program histogram: [22, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:58,909 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 12:34:58,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 12:34:58 BoogieIcfgContainer [2021-11-23 12:34:58,911 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 12:34:58,912 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 12:34:58,912 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 12:34:58,912 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 12:34:58,913 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:33:42" (3/4) ... [2021-11-23 12:34:58,915 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 12:34:58,925 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-11-23 12:34:58,926 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-23 12:34:58,926 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-23 12:34:58,926 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 12:34:58,972 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/witness.graphml [2021-11-23 12:34:58,973 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 12:34:58,979 INFO L158 Benchmark]: Toolchain (without parser) took 77643.14ms. Allocated memory was 111.1MB in the beginning and 163.6MB in the end (delta: 52.4MB). Free memory was 70.7MB in the beginning and 77.7MB in the end (delta: -7.0MB). Peak memory consumption was 46.5MB. Max. memory is 16.1GB. [2021-11-23 12:34:58,979 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 111.1MB. Free memory is still 88.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:34:58,982 INFO L158 Benchmark]: CACSL2BoogieTranslator took 552.26ms. Allocated memory is still 111.1MB. Free memory was 70.5MB in the beginning and 80.3MB in the end (delta: -9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 12:34:58,982 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.63ms. Allocated memory is still 111.1MB. Free memory was 80.3MB in the beginning and 78.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 12:34:58,983 INFO L158 Benchmark]: Boogie Preprocessor took 37.21ms. Allocated memory is still 111.1MB. Free memory was 78.4MB in the beginning and 76.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:34:58,984 INFO L158 Benchmark]: RCFGBuilder took 340.39ms. Allocated memory is still 111.1MB. Free memory was 76.9MB in the beginning and 65.5MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 12:34:58,984 INFO L158 Benchmark]: TraceAbstraction took 76579.19ms. Allocated memory was 111.1MB in the beginning and 163.6MB in the end (delta: 52.4MB). Free memory was 65.1MB in the beginning and 81.4MB in the end (delta: -16.3MB). Peak memory consumption was 38.1MB. Max. memory is 16.1GB. [2021-11-23 12:34:58,984 INFO L158 Benchmark]: Witness Printer took 60.87ms. Allocated memory is still 163.6MB. Free memory was 81.4MB in the beginning and 77.7MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 12:34:58,985 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 111.1MB. Free memory is still 88.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 552.26ms. Allocated memory is still 111.1MB. Free memory was 70.5MB in the beginning and 80.3MB in the end (delta: -9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 66.63ms. Allocated memory is still 111.1MB. Free memory was 80.3MB in the beginning and 78.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.21ms. Allocated memory is still 111.1MB. Free memory was 78.4MB in the beginning and 76.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 340.39ms. Allocated memory is still 111.1MB. Free memory was 76.9MB in the beginning and 65.5MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 76579.19ms. Allocated memory was 111.1MB in the beginning and 163.6MB in the end (delta: 52.4MB). Free memory was 65.1MB in the beginning and 81.4MB in the end (delta: -16.3MB). Peak memory consumption was 38.1MB. Max. memory is 16.1GB. * Witness Printer took 60.87ms. Allocated memory is still 163.6MB. Free memory was 81.4MB in the beginning and 77.7MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 538]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 538]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 76.5s, OverallIterations: 35, TraceHistogramMax: 12, PathProgramHistogramMax: 22, EmptinessCheckTime: 0.1s, AutomataDifference: 25.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 10696 SdHoareTripleChecker+Valid, 11.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10696 mSDsluCounter, 16786 SdHoareTripleChecker+Invalid, 9.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 974 IncrementalHoareTripleChecker+Unchecked, 15700 mSDsCounter, 2060 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23184 IncrementalHoareTripleChecker+Invalid, 26218 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2060 mSolverCounterUnsat, 1086 mSDtfsCounter, 23184 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4182 GetRequests, 2712 SyntacticMatches, 93 SemanticMatches, 1377 ConstructedPredicates, 0 IntricatePredicates, 21 DeprecatedPredicates, 16359 ImplicationChecksByTransitivity, 33.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=196occurred in iteration=34, InterpolantAutomatonStates: 684, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 35 MinimizatonAttempts, 305 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 42.0s InterpolantComputationTime, 3354 NumberOfCodeBlocks, 3354 NumberOfCodeBlocksAsserted, 145 NumberOfCheckSat, 4905 ConstructedInterpolants, 188 QuantifiedInterpolants, 46337 SizeOfPredicates, 353 NumberOfNonLiveVariables, 6204 ConjunctsInSsa, 1260 ConjunctsInUnsatCore, 87 InterpolantComputations, 9 PerfectInterpolantSequences, 4124/15626 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-23 12:34:59,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480a5952-6c1c-4dd6-ac65-dca330d4636c/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE