./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/loops/invert_string-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/loops/invert_string-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ca98535e808a51f7cfa7d21c9d33f259821212a6554e27f29c2bddd9197c0249 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis No suitable file found in config dir /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/config using search string *Termination*32bit*_Bitvector*.epf No suitable settings file found using Termination*32bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: MapEliminator tries to combine Int and (Array Int Int) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:33:44,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:33:44,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:33:44,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:33:44,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:33:44,960 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:33:44,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:33:44,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:33:44,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:33:44,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:33:44,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:33:44,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:33:44,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:33:44,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:33:44,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:33:44,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:33:44,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:33:44,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:33:44,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:33:44,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:33:44,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:33:44,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:33:44,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:33:44,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:33:44,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:33:44,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:33:44,993 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:33:44,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:33:44,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:33:44,996 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:33:44,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:33:44,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:33:44,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:33:44,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:33:45,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:33:45,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:33:45,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:33:45,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:33:45,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:33:45,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:33:45,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:33:45,005 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-10-21 19:33:45,029 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:33:45,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:33:45,030 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:33:45,031 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:33:45,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:33:45,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:33:45,033 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:33:45,033 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-21 19:33:45,034 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-21 19:33:45,034 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-21 19:33:45,034 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-21 19:33:45,035 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-21 19:33:45,035 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-21 19:33:45,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:33:45,036 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:33:45,036 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:33:45,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:33:45,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:33:45,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:33:45,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-21 19:33:45,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-21 19:33:45,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-21 19:33:45,039 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:33:45,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:33:45,039 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-21 19:33:45,040 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:33:45,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-21 19:33:45,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:33:45,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:33:45,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:33:45,041 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:33:45,041 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:33:45,042 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-21 19:33:45,042 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca98535e808a51f7cfa7d21c9d33f259821212a6554e27f29c2bddd9197c0249 [2021-10-21 19:33:45,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:33:45,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:33:45,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:33:45,382 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:33:45,384 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:33:45,384 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/loops/invert_string-3.c [2021-10-21 19:33:45,463 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/data/6bde45f54/77d41bc0e3524b0bb81f4c738614d0f5/FLAG5174095be [2021-10-21 19:33:45,861 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:33:45,862 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/sv-benchmarks/c/loops/invert_string-3.c [2021-10-21 19:33:45,867 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/data/6bde45f54/77d41bc0e3524b0bb81f4c738614d0f5/FLAG5174095be [2021-10-21 19:33:46,254 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/data/6bde45f54/77d41bc0e3524b0bb81f4c738614d0f5 [2021-10-21 19:33:46,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:33:46,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:33:46,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:33:46,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:33:46,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:33:46,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:33:46" (1/1) ... [2021-10-21 19:33:46,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c3554d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:33:46, skipping insertion in model container [2021-10-21 19:33:46,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:33:46" (1/1) ... [2021-10-21 19:33:46,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:33:46,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:33:46,437 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/sv-benchmarks/c/loops/invert_string-3.c[327,340] [2021-10-21 19:33:46,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:33:46,464 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:33:46,474 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/sv-benchmarks/c/loops/invert_string-3.c[327,340] [2021-10-21 19:33:46,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:33:46,495 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:33:46,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:33:46 WrapperNode [2021-10-21 19:33:46,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:33:46,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:33:46,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:33:46,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:33:46,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:33:46" (1/1) ... [2021-10-21 19:33:46,509 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:33:46" (1/1) ... [2021-10-21 19:33:46,529 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:33:46,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:33:46,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:33:46,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:33:46,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:33:46" (1/1) ... [2021-10-21 19:33:46,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:33:46" (1/1) ... [2021-10-21 19:33:46,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:33:46" (1/1) ... [2021-10-21 19:33:46,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:33:46" (1/1) ... [2021-10-21 19:33:46,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:33:46" (1/1) ... [2021-10-21 19:33:46,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:33:46" (1/1) ... [2021-10-21 19:33:46,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:33:46" (1/1) ... [2021-10-21 19:33:46,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:33:46,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:33:46,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:33:46,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:33:46,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:33:46" (1/1) ... [2021-10-21 19:33:46,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:46,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:46,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:46,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-21 19:33:46,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:33:46,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:33:46,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:33:46,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:33:46,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:33:46,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:33:46,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:33:46,858 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:33:46,858 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-21 19:33:46,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:33:46 BoogieIcfgContainer [2021-10-21 19:33:46,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:33:46,861 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-21 19:33:46,862 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-21 19:33:46,865 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-21 19:33:46,865 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 19:33:46,866 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 21.10 07:33:46" (1/3) ... [2021-10-21 19:33:46,867 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4e256077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.10 07:33:46, skipping insertion in model container [2021-10-21 19:33:46,867 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 19:33:46,868 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:33:46" (2/3) ... [2021-10-21 19:33:46,868 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4e256077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.10 07:33:46, skipping insertion in model container [2021-10-21 19:33:46,868 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 19:33:46,868 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:33:46" (3/3) ... [2021-10-21 19:33:46,870 INFO L389 chiAutomizerObserver]: Analyzing ICFG invert_string-3.c [2021-10-21 19:33:46,911 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-21 19:33:46,911 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-21 19:33:46,911 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-21 19:33:46,912 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-21 19:33:46,912 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-21 19:33:46,912 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-21 19:33:46,912 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-21 19:33:46,912 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-21 19:33:46,926 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:33:46,943 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2021-10-21 19:33:46,944 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:33:46,944 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:33:46,949 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 19:33:46,949 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-21 19:33:46,949 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-21 19:33:46,950 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:33:46,952 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2021-10-21 19:33:46,953 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:33:46,953 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:33:46,953 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 19:33:46,953 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-21 19:33:46,959 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 6#L-1true havoc main_#res;havoc main_#t~nondet8, main_#t~post7, main_#t~mem10, main_#t~post11, main_#t~post9, main_#t~mem13, main_#t~mem14, main_#t~post15, main_#t~post12, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 15#L18-3true [2021-10-21 19:33:46,960 INFO L793 eck$LassoCheckResult]: Loop: 15#L18-3true assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 10#L18-2true main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 15#L18-3true [2021-10-21 19:33:46,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:46,965 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-10-21 19:33:46,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:46,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405905183] [2021-10-21 19:33:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:46,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:47,109 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:33:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:47,164 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:33:47,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:47,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1283, now seen corresponding path program 1 times [2021-10-21 19:33:47,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:47,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650977838] [2021-10-21 19:33:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:47,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:47,187 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:33:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:47,204 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:33:47,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:47,206 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-10-21 19:33:47,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:47,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111376134] [2021-10-21 19:33:47,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:47,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:47,251 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:33:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:47,306 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:33:48,094 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:33:48,095 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:33:48,095 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:33:48,095 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:33:48,095 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 19:33:48,096 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:48,096 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:33:48,096 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:33:48,096 INFO L133 ssoRankerPreferences]: Filename of dumped script: invert_string-3.c_Iteration1_Lasso [2021-10-21 19:33:48,096 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:33:48,097 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:33:48,120 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:48,126 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:48,133 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:48,136 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:48,141 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:48,143 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:48,146 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:48,149 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:48,151 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:48,154 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:48,158 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:48,435 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:48,437 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:48,439 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:48,441 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:48,444 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:48,808 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:33:48,812 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 19:33:48,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:48,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:48,816 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:48,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-21 19:33:48,821 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:48,831 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:48,831 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:33:48,832 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:48,832 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:48,832 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:48,834 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:33:48,835 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:33:48,842 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:48,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:48,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:48,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:48,865 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:48,867 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:48,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-21 19:33:48,875 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:48,875 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:48,875 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:48,875 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:48,879 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:48,879 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:48,894 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:48,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:48,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:48,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:48,935 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:48,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-21 19:33:48,940 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:48,950 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:48,950 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:33:48,950 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:48,951 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:48,951 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:48,951 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:33:48,951 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:33:48,971 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:49,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:49,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:49,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:49,007 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:49,013 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:49,021 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:49,022 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:33:49,022 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:49,022 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:49,022 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:49,023 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:33:49,023 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:33:49,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-21 19:33:49,039 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:49,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:49,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:49,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:49,075 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:49,080 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:49,089 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:49,089 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:49,089 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:49,090 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:49,092 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:49,093 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:49,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-21 19:33:49,115 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:49,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:49,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:49,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:49,149 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:49,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-21 19:33:49,151 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:49,158 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:49,158 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:49,158 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:49,158 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:49,161 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:49,161 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:49,174 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:49,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:49,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:49,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:49,194 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:49,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-21 19:33:49,199 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:49,207 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:49,207 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:33:49,207 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:49,207 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:49,207 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:49,208 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:33:49,208 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:33:49,218 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:49,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:49,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:49,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:49,258 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:49,267 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:49,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-21 19:33:49,276 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:49,276 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:33:49,276 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:49,276 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:49,276 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:49,277 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:33:49,277 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:33:49,295 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:49,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:49,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:49,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:49,319 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:49,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-21 19:33:49,325 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:49,332 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:49,332 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:49,332 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:49,332 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:49,335 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:49,335 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:49,376 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:49,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:49,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:49,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:49,411 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:49,420 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:49,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-21 19:33:49,430 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:49,430 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:33:49,430 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:49,430 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:49,430 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:49,433 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:33:49,433 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:33:49,447 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:49,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:49,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:49,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:49,477 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:49,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-21 19:33:49,478 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:49,487 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:49,487 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:49,488 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:49,488 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:49,490 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:49,490 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:49,504 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:49,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:49,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:49,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:49,531 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:49,533 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:49,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-21 19:33:49,540 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:49,540 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:49,540 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:49,540 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:49,542 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:49,542 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:49,557 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:49,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:49,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:49,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:49,579 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:49,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-21 19:33:49,581 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:49,588 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:49,588 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:33:49,588 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:49,588 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:49,588 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:49,589 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:33:49,589 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:33:49,595 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:49,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:49,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:49,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:49,617 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:49,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-21 19:33:49,618 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:49,625 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:49,625 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:49,625 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:49,625 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:49,627 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:49,628 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:49,659 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:49,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:49,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:49,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:49,686 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:49,687 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:49,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-21 19:33:49,694 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:49,694 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:49,694 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:49,694 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:49,696 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:49,696 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:49,723 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:49,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:49,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:49,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:49,747 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:49,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-21 19:33:49,750 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:49,757 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:49,757 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:49,757 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:49,757 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:49,759 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:49,760 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:49,774 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:49,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:49,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:49,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:49,814 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:49,819 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:49,828 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:49,829 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:49,829 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:49,829 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:49,833 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:49,833 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:49,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-21 19:33:49,857 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:49,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:49,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:49,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:49,895 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:49,897 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:49,906 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:49,906 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:49,906 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:49,906 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:49,909 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:49,909 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:49,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-21 19:33:49,927 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:49,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:49,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:49,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:49,963 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:49,972 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:49,981 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:49,981 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:49,981 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:49,981 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:49,983 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:49,983 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:49,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-21 19:33:49,996 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:50,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:50,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:50,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:50,032 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:50,036 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:50,044 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:50,045 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:50,045 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:50,045 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:50,049 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:50,049 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:50,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-10-21 19:33:50,067 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:50,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:50,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:50,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:50,106 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:50,108 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:50,117 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:50,117 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:33:50,117 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:50,117 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:50,117 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:50,118 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:33:50,118 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:33:50,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-10-21 19:33:50,136 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:50,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:50,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:50,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:50,158 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:50,160 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:50,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-10-21 19:33:50,167 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:50,167 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:50,167 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:50,167 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:50,169 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:50,169 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:50,180 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:50,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:50,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:50,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:50,218 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:50,228 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:50,237 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:50,237 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:50,237 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:50,237 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:50,241 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:50,241 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:50,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-10-21 19:33:50,263 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:50,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:50,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:50,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:50,299 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:50,301 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:50,311 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:50,311 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:50,311 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:50,311 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:50,319 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:50,319 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:50,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-10-21 19:33:50,339 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 19:33:50,411 INFO L443 ModelExtractionUtils]: Simplification made 10 calls to the SMT solver. [2021-10-21 19:33:50,411 INFO L444 ModelExtractionUtils]: 3 out of 22 variables were initially zero. Simplification set additionally 15 variables to zero. [2021-10-21 19:33:50,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:50,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:50,443 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:50,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-21 19:33:50,499 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 19:33:50,537 INFO L438 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 2. [2021-10-21 19:33:50,537 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 19:33:50,538 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0, v_rep(select #length ULTIMATE.start_main_~#str1~0.base)_1, ULTIMATE.start_main_~#str1~0.offset) = -1*ULTIMATE.start_main_~i~0 + 1*v_rep(select #length ULTIMATE.start_main_~#str1~0.base)_1 - 1*ULTIMATE.start_main_~#str1~0.offset Supporting invariants [] [2021-10-21 19:33:50,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:50,629 INFO L297 tatePredicateManager]: 16 out of 16 supporting invariants were superfluous and have been removed [2021-10-21 19:33:50,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:33:50,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:33:50,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:33:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:33:50,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:33:50,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:33:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:33:50,758 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-21 19:33:50,759 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:33:50,801 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 33 states and 47 transitions. Complement of second has 8 states. [2021-10-21 19:33:50,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-21 19:33:50,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:33:50,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 23 transitions. [2021-10-21 19:33:50,806 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 23 transitions. Stem has 2 letters. Loop has 2 letters. [2021-10-21 19:33:50,806 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:33:50,806 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 23 transitions. Stem has 4 letters. Loop has 2 letters. [2021-10-21 19:33:50,806 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:33:50,806 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 23 transitions. Stem has 2 letters. Loop has 4 letters. [2021-10-21 19:33:50,807 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:33:50,807 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 47 transitions. [2021-10-21 19:33:50,810 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2021-10-21 19:33:50,814 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 14 states and 19 transitions. [2021-10-21 19:33:50,815 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-10-21 19:33:50,815 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2021-10-21 19:33:50,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 19 transitions. [2021-10-21 19:33:50,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:33:50,816 INFO L681 BuchiCegarLoop]: Abstraction has 14 states and 19 transitions. [2021-10-21 19:33:50,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 19 transitions. [2021-10-21 19:33:50,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-21 19:33:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:33:50,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2021-10-21 19:33:50,834 INFO L704 BuchiCegarLoop]: Abstraction has 14 states and 19 transitions. [2021-10-21 19:33:50,834 INFO L587 BuchiCegarLoop]: Abstraction has 14 states and 19 transitions. [2021-10-21 19:33:50,834 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-21 19:33:50,835 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 19 transitions. [2021-10-21 19:33:50,835 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2021-10-21 19:33:50,835 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:33:50,836 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:33:50,836 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-10-21 19:33:50,836 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-21 19:33:50,836 INFO L791 eck$LassoCheckResult]: Stem: 154#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 155#L-1 havoc main_#res;havoc main_#t~nondet8, main_#t~post7, main_#t~mem10, main_#t~post11, main_#t~post9, main_#t~mem13, main_#t~mem14, main_#t~post15, main_#t~post12, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 158#L18-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 167#L18-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 166#L26-3 [2021-10-21 19:33:50,837 INFO L793 eck$LassoCheckResult]: Loop: 166#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 165#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 166#L26-3 [2021-10-21 19:33:50,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:50,837 INFO L82 PathProgramCache]: Analyzing trace with hash 925707, now seen corresponding path program 1 times [2021-10-21 19:33:50,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:50,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568789365] [2021-10-21 19:33:50,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:50,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:33:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:33:51,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:33:51,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568789365] [2021-10-21 19:33:51,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568789365] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:33:51,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:33:51,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:33:51,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684042678] [2021-10-21 19:33:51,040 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:33:51,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:51,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1731, now seen corresponding path program 1 times [2021-10-21 19:33:51,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:51,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508480031] [2021-10-21 19:33:51,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:51,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:51,048 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:33:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:51,056 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:33:51,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:33:51,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:33:51,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:33:51,152 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. cyclomatic complexity: 8 Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:33:51,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:33:51,180 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-10-21 19:33:51,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:33:51,181 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 17 transitions. [2021-10-21 19:33:51,182 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-21 19:33:51,183 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 14 states and 16 transitions. [2021-10-21 19:33:51,183 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-10-21 19:33:51,183 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-10-21 19:33:51,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 16 transitions. [2021-10-21 19:33:51,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:33:51,183 INFO L681 BuchiCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-21 19:33:51,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 16 transitions. [2021-10-21 19:33:51,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-10-21 19:33:51,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:33:51,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-10-21 19:33:51,185 INFO L704 BuchiCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-10-21 19:33:51,186 INFO L587 BuchiCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-10-21 19:33:51,186 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-21 19:33:51,186 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 15 transitions. [2021-10-21 19:33:51,186 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-21 19:33:51,187 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:33:51,187 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:33:51,187 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:33:51,187 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-21 19:33:51,187 INFO L791 eck$LassoCheckResult]: Stem: 191#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 192#L-1 havoc main_#res;havoc main_#t~nondet8, main_#t~post7, main_#t~mem10, main_#t~post11, main_#t~post9, main_#t~mem13, main_#t~mem14, main_#t~post15, main_#t~post12, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 200#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 194#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 195#L18-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 201#L18-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 199#L26-3 [2021-10-21 19:33:51,188 INFO L793 eck$LassoCheckResult]: Loop: 199#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 198#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 199#L26-3 [2021-10-21 19:33:51,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:51,188 INFO L82 PathProgramCache]: Analyzing trace with hash 889660429, now seen corresponding path program 1 times [2021-10-21 19:33:51,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:51,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137516759] [2021-10-21 19:33:51,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:51,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:51,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:33:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:33:51,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:33:51,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137516759] [2021-10-21 19:33:51,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137516759] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:33:51,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235868804] [2021-10-21 19:33:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:51,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:33:51,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:51,335 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:33:51,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-21 19:33:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:33:51,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:33:51,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:33:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:33:51,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235868804] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:33:51,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:33:51,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-21 19:33:51,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830064584] [2021-10-21 19:33:51,446 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:33:51,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:51,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1731, now seen corresponding path program 2 times [2021-10-21 19:33:51,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:51,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53066415] [2021-10-21 19:33:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:51,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:51,465 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:33:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:51,479 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:33:51,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:33:51,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:33:51,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:33:51,559 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. cyclomatic complexity: 5 Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:33:51,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:33:51,614 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-10-21 19:33:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:33:51,615 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 18 transitions. [2021-10-21 19:33:51,615 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-21 19:33:51,616 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 16 states and 18 transitions. [2021-10-21 19:33:51,616 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-10-21 19:33:51,616 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-10-21 19:33:51,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 18 transitions. [2021-10-21 19:33:51,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:33:51,616 INFO L681 BuchiCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-10-21 19:33:51,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 18 transitions. [2021-10-21 19:33:51,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-10-21 19:33:51,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:33:51,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-10-21 19:33:51,618 INFO L704 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-21 19:33:51,618 INFO L587 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-21 19:33:51,621 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-21 19:33:51,621 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 17 transitions. [2021-10-21 19:33:51,622 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-21 19:33:51,623 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:33:51,623 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:33:51,623 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1] [2021-10-21 19:33:51,624 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-21 19:33:51,624 INFO L791 eck$LassoCheckResult]: Stem: 244#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 245#L-1 havoc main_#res;havoc main_#t~nondet8, main_#t~post7, main_#t~mem10, main_#t~post11, main_#t~post9, main_#t~mem13, main_#t~mem14, main_#t~post15, main_#t~post12, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 253#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 247#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 248#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 254#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 256#L18-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 255#L18-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 252#L26-3 [2021-10-21 19:33:51,624 INFO L793 eck$LassoCheckResult]: Loop: 252#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 251#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 252#L26-3 [2021-10-21 19:33:51,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:51,625 INFO L82 PathProgramCache]: Analyzing trace with hash 265236367, now seen corresponding path program 2 times [2021-10-21 19:33:51,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:51,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950012980] [2021-10-21 19:33:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:51,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:33:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:33:51,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:33:51,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950012980] [2021-10-21 19:33:51,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950012980] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:33:51,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230563311] [2021-10-21 19:33:51,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:33:51,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:33:51,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:51,782 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:33:51,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-21 19:33:51,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:33:51,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:33:51,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 19:33:51,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:33:51,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 51 [2021-10-21 19:33:51,922 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-21 19:33:51,923 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 52 [2021-10-21 19:33:51,941 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-21 19:33:51,941 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 56 [2021-10-21 19:33:51,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-21 19:33:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:33:52,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230563311] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:33:52,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:33:52,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-10-21 19:33:52,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609683722] [2021-10-21 19:33:52,266 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:33:52,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:52,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1731, now seen corresponding path program 3 times [2021-10-21 19:33:52,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:52,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211335399] [2021-10-21 19:33:52,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:52,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:52,281 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:33:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:52,296 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:33:52,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:33:52,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:33:52,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:33:52,377 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. cyclomatic complexity: 5 Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:33:52,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:33:52,491 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-10-21 19:33:52,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:33:52,491 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18 states and 20 transitions. [2021-10-21 19:33:52,492 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-21 19:33:52,493 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18 states to 18 states and 20 transitions. [2021-10-21 19:33:52,493 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-10-21 19:33:52,493 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-10-21 19:33:52,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 20 transitions. [2021-10-21 19:33:52,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:33:52,493 INFO L681 BuchiCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-10-21 19:33:52,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 20 transitions. [2021-10-21 19:33:52,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-10-21 19:33:52,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:33:52,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-21 19:33:52,495 INFO L704 BuchiCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-21 19:33:52,495 INFO L587 BuchiCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-21 19:33:52,495 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-21 19:33:52,495 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 19 transitions. [2021-10-21 19:33:52,496 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-21 19:33:52,496 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:33:52,496 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:33:52,496 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 3, 1, 1, 1, 1] [2021-10-21 19:33:52,496 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-21 19:33:52,497 INFO L791 eck$LassoCheckResult]: Stem: 310#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 311#L-1 havoc main_#res;havoc main_#t~nondet8, main_#t~post7, main_#t~mem10, main_#t~post11, main_#t~post9, main_#t~mem13, main_#t~mem14, main_#t~post15, main_#t~post12, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 319#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 320#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 321#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 313#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 314#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 324#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 323#L18-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 322#L18-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 318#L26-3 [2021-10-21 19:33:52,497 INFO L793 eck$LassoCheckResult]: Loop: 318#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 317#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 318#L26-3 [2021-10-21 19:33:52,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:52,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1489134225, now seen corresponding path program 3 times [2021-10-21 19:33:52,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:52,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402171048] [2021-10-21 19:33:52,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:52,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:33:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:33:52,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:33:52,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402171048] [2021-10-21 19:33:52,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402171048] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:33:52,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345495524] [2021-10-21 19:33:52,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:33:52,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:33:52,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:52,700 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:33:52,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-21 19:33:52,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 19:33:52,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:33:52,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:33:52,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:33:52,822 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 53 treesize of output 51 [2021-10-21 19:33:52,837 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-21 19:33:52,837 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 52 [2021-10-21 19:33:52,851 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-21 19:33:52,851 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 56 [2021-10-21 19:33:52,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-21 19:33:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:33:53,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345495524] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:33:53,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:33:53,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-10-21 19:33:53,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053125635] [2021-10-21 19:33:53,197 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:33:53,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:53,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1731, now seen corresponding path program 4 times [2021-10-21 19:33:53,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:53,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229245243] [2021-10-21 19:33:53,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:53,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:53,205 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:33:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:53,210 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:33:53,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:33:53,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:33:53,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:33:53,283 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. cyclomatic complexity: 5 Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:33:53,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:33:53,383 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-10-21 19:33:53,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:33:53,383 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 20 states and 22 transitions. [2021-10-21 19:33:53,384 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-21 19:33:53,384 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 20 states to 20 states and 22 transitions. [2021-10-21 19:33:53,384 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-10-21 19:33:53,385 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-10-21 19:33:53,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 22 transitions. [2021-10-21 19:33:53,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:33:53,385 INFO L681 BuchiCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-10-21 19:33:53,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 22 transitions. [2021-10-21 19:33:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-10-21 19:33:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:33:53,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-10-21 19:33:53,387 INFO L704 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-10-21 19:33:53,387 INFO L587 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-10-21 19:33:53,387 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-21 19:33:53,387 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 21 transitions. [2021-10-21 19:33:53,388 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-21 19:33:53,388 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:33:53,388 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:33:53,388 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 1, 1, 1, 1] [2021-10-21 19:33:53,388 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-21 19:33:53,388 INFO L791 eck$LassoCheckResult]: Stem: 389#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 390#L-1 havoc main_#res;havoc main_#t~nondet8, main_#t~post7, main_#t~mem10, main_#t~post11, main_#t~post9, main_#t~mem13, main_#t~mem14, main_#t~post15, main_#t~post12, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 397#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 398#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 399#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 391#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 392#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 404#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 403#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 402#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 401#L18-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 400#L18-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 396#L26-3 [2021-10-21 19:33:53,388 INFO L793 eck$LassoCheckResult]: Loop: 396#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 395#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 396#L26-3 [2021-10-21 19:33:53,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:53,389 INFO L82 PathProgramCache]: Analyzing trace with hash 833936659, now seen corresponding path program 4 times [2021-10-21 19:33:53,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:53,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95882251] [2021-10-21 19:33:53,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:53,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:33:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:33:53,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:33:53,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95882251] [2021-10-21 19:33:53,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95882251] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:33:53,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732307722] [2021-10-21 19:33:53,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:33:53,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:33:53,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:53,559 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:33:53,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-21 19:33:53,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:33:53,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:33:53,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:33:53,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:33:53,702 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-21 19:33:53,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2021-10-21 19:33:53,711 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-21 19:33:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:33:53,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732307722] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:33:53,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:33:53,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-10-21 19:33:53,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576787361] [2021-10-21 19:33:53,943 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:33:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:53,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1731, now seen corresponding path program 5 times [2021-10-21 19:33:53,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:53,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17608429] [2021-10-21 19:33:53,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:53,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:53,953 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:33:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:53,963 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:33:54,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:33:54,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:33:54,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:33:54,041 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. cyclomatic complexity: 5 Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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) [2021-10-21 19:33:54,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:33:54,178 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-10-21 19:33:54,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:33:54,178 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 24 transitions. [2021-10-21 19:33:54,179 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-21 19:33:54,179 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 22 states and 24 transitions. [2021-10-21 19:33:54,180 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-10-21 19:33:54,180 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-10-21 19:33:54,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 24 transitions. [2021-10-21 19:33:54,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:33:54,180 INFO L681 BuchiCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-21 19:33:54,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states and 24 transitions. [2021-10-21 19:33:54,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-10-21 19:33:54,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:33:54,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-10-21 19:33:54,182 INFO L704 BuchiCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-10-21 19:33:54,182 INFO L587 BuchiCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-10-21 19:33:54,182 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-21 19:33:54,182 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 23 transitions. [2021-10-21 19:33:54,183 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-21 19:33:54,183 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:33:54,183 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:33:54,183 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 1, 1, 1, 1] [2021-10-21 19:33:54,183 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-21 19:33:54,184 INFO L791 eck$LassoCheckResult]: Stem: 478#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 479#L-1 havoc main_#res;havoc main_#t~nondet8, main_#t~post7, main_#t~mem10, main_#t~post11, main_#t~post9, main_#t~mem13, main_#t~mem14, main_#t~post15, main_#t~post12, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 487#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 488#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 489#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 481#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 482#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 496#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 495#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 494#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 493#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 492#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 491#L18-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 490#L18-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 486#L26-3 [2021-10-21 19:33:54,184 INFO L793 eck$LassoCheckResult]: Loop: 486#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 485#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 486#L26-3 [2021-10-21 19:33:54,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:54,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1745699051, now seen corresponding path program 5 times [2021-10-21 19:33:54,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:54,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566920460] [2021-10-21 19:33:54,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:54,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:54,214 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:33:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:54,264 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:33:54,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:54,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1731, now seen corresponding path program 6 times [2021-10-21 19:33:54,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:54,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733434288] [2021-10-21 19:33:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:54,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:54,275 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:33:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:54,279 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:33:54,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:54,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1715425495, now seen corresponding path program 1 times [2021-10-21 19:33:54,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:54,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573354301] [2021-10-21 19:33:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:54,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:54,313 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:33:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:54,387 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:33:58,109 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:33:58,109 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:33:58,109 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:33:58,109 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:33:58,109 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 19:33:58,109 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:58,109 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:33:58,109 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:33:58,110 INFO L133 ssoRankerPreferences]: Filename of dumped script: invert_string-3.c_Iteration7_Lasso [2021-10-21 19:33:58,110 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:33:58,110 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:33:58,110 WARN L313 ript$VariableManager]: TermVariabe aux_div_aux_mod_v_ULTIMATE.start_main_~i~0_60_61_63 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:33:58,110 WARN L313 ript$VariableManager]: TermVariabe aux_div_v_ULTIMATE.start_main_~i~0_60_61 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:33:58,110 WARN L313 ript$VariableManager]: TermVariabe aux_mod_aux_mod_v_ULTIMATE.start_main_~i~0_60_61_63 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:33:58,114 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:58,125 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:58,587 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:58,589 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:58,591 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:58,593 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:58,595 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:58,597 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:58,598 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:58,601 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:58,603 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:58,604 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:58,606 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:58,608 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:58,610 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:33:59,079 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:33:59,079 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 19:33:59,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:59,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:59,084 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:59,085 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:59,094 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:59,094 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:59,095 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:59,095 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:59,096 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:59,096 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:59,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-21 19:33:59,119 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:59,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:59,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:59,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:59,155 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:59,158 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:59,167 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:59,168 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:59,168 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:59,168 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:59,170 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:59,170 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:59,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-10-21 19:33:59,183 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:59,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:59,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:59,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:59,218 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:59,224 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:59,233 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:59,233 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:59,233 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:59,233 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:59,235 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:59,235 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:59,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-21 19:33:59,247 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:59,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:59,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:59,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:59,283 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:59,285 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:59,293 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:59,294 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:59,294 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:59,294 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:59,295 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:59,295 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:59,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-21 19:33:59,339 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:59,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:59,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:59,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:59,366 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:59,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-10-21 19:33:59,368 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:59,375 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:59,375 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:33:59,375 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:59,375 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:59,375 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:59,376 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:33:59,376 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:33:59,386 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:59,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Ended with exit code 0 [2021-10-21 19:33:59,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:59,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:59,408 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:59,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-10-21 19:33:59,410 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:59,417 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:59,417 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:59,417 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:59,418 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:59,419 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:59,419 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:59,422 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:59,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:59,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:59,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:59,441 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:59,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-10-21 19:33:59,442 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:59,451 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:59,452 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:59,452 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:59,452 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:59,453 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:59,453 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:59,466 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:33:59,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:59,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:59,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:59,496 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:59,498 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:33:59,508 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:33:59,508 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:33:59,508 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:33:59,508 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:33:59,521 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:33:59,521 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:33:59,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-10-21 19:33:59,547 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 19:33:59,643 INFO L443 ModelExtractionUtils]: Simplification made 23 calls to the SMT solver. [2021-10-21 19:33:59,643 INFO L444 ModelExtractionUtils]: 7 out of 28 variables were initially zero. Simplification set additionally 15 variables to zero. [2021-10-21 19:33:59,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:33:59,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:59,645 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:33:59,646 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 19:33:59,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-10-21 19:33:59,668 INFO L438 nArgumentSynthesizer]: Removed 1 redundant supporting invariants from a total of 2. [2021-10-21 19:33:59,668 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 19:33:59,668 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(v_rep(select #length ULTIMATE.start_main_~#str1~0.base)_2, ULTIMATE.start_main_~j~0) = 6442450943*v_rep(select #length ULTIMATE.start_main_~#str1~0.base)_2 - 1*ULTIMATE.start_main_~j~0 Supporting invariants [-3*ULTIMATE.start_main_~i~0 + 12884901885*v_rep(select #length ULTIMATE.start_main_~#str1~0.base)_2 - 2*ULTIMATE.start_main_~j~0 >= 0] [2021-10-21 19:33:59,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:59,750 INFO L297 tatePredicateManager]: 16 out of 17 supporting invariants were superfluous and have been removed [2021-10-21 19:33:59,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:33:59,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:33:59,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:00,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:34:00,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:00,050 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.7 stem predicates 2 loop predicates [2021-10-21 19:34:00,051 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states and 23 transitions. cyclomatic complexity: 5 Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:34:00,282 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states and 23 transitions. cyclomatic complexity: 5. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 26 states and 30 transitions. Complement of second has 11 states. [2021-10-21 19:34:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 6 stem states 1 non-accepting loop states 2 accepting loop states [2021-10-21 19:34:00,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:34:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 16 transitions. [2021-10-21 19:34:00,283 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 16 transitions. Stem has 14 letters. Loop has 2 letters. [2021-10-21 19:34:00,284 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:34:00,284 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 19:34:00,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:00,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:34:00,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:00,548 WARN L261 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:34:00,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:00,588 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.7 stem predicates 2 loop predicates [2021-10-21 19:34:00,588 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states and 23 transitions. cyclomatic complexity: 5 Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:34:00,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:00,839 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states and 23 transitions. cyclomatic complexity: 5. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 24 states and 29 transitions. Complement of second has 12 states. [2021-10-21 19:34:00,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 6 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-21 19:34:00,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:34:00,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 17 transitions. [2021-10-21 19:34:00,841 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 17 transitions. Stem has 14 letters. Loop has 2 letters. [2021-10-21 19:34:00,841 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:34:00,841 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 17 transitions. Stem has 16 letters. Loop has 2 letters. [2021-10-21 19:34:00,841 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:34:00,841 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 17 transitions. Stem has 14 letters. Loop has 4 letters. [2021-10-21 19:34:00,841 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:34:00,841 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 29 transitions. [2021-10-21 19:34:00,842 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-21 19:34:00,843 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 22 states and 25 transitions. [2021-10-21 19:34:00,843 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2021-10-21 19:34:00,843 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-10-21 19:34:00,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 25 transitions. [2021-10-21 19:34:00,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:34:00,843 INFO L681 BuchiCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-10-21 19:34:00,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states and 25 transitions. [2021-10-21 19:34:00,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-21 19:34:00,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:34:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-10-21 19:34:00,845 INFO L704 BuchiCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-10-21 19:34:00,846 INFO L587 BuchiCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-10-21 19:34:00,846 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-21 19:34:00,846 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states and 25 transitions. [2021-10-21 19:34:00,846 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-21 19:34:00,846 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:34:00,846 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:34:00,847 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:00,847 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-21 19:34:00,847 INFO L791 eck$LassoCheckResult]: Stem: 797#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 798#L-1 havoc main_#res;havoc main_#t~nondet8, main_#t~post7, main_#t~mem10, main_#t~post11, main_#t~post9, main_#t~mem13, main_#t~mem14, main_#t~post15, main_#t~post12, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 806#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 800#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 801#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 807#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 816#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 815#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 814#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 813#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 812#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 811#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 810#L18-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 808#L18-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 809#L26-3 assume !(main_~i~0 >= 0); 803#L26-4 main_~j~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296);main_~i~0 := 0; 796#L32-3 [2021-10-21 19:34:00,847 INFO L793 eck$LassoCheckResult]: Loop: 796#L32-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call main_#t~mem13 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call main_#t~mem14 := read~int(main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);__VERIFIER_assert_#in~cond := (if main_#t~mem13 == main_#t~mem14 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 802#L6 assume !(0 == __VERIFIER_assert_~cond); 799#L6-2 havoc main_#t~mem13;havoc main_#t~mem14;main_#t~post15 := main_~j~0;main_~j~0 := main_#t~post15 - 1;havoc main_#t~post15; 795#L32-2 main_#t~post12 := main_~i~0;main_~i~0 := 1 + main_#t~post12;havoc main_#t~post12; 796#L32-3 [2021-10-21 19:34:00,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:00,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1715425437, now seen corresponding path program 1 times [2021-10-21 19:34:00,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:00,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885473868] [2021-10-21 19:34:00,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:00,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-21 19:34:00,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:00,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885473868] [2021-10-21 19:34:00,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885473868] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:00,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:00,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:34:00,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444733171] [2021-10-21 19:34:00,903 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:34:00,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:00,903 INFO L82 PathProgramCache]: Analyzing trace with hash 2100362, now seen corresponding path program 1 times [2021-10-21 19:34:00,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:00,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860805994] [2021-10-21 19:34:00,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:00,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:34:00,910 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:34:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:34:00,915 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:34:01,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:01,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:34:01,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:34:01,021 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. cyclomatic complexity: 6 Second operand has 4 states, 4 states have (on average 2.0) 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) [2021-10-21 19:34:01,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:01,052 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-10-21 19:34:01,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:34:01,053 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 25 transitions. [2021-10-21 19:34:01,054 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-21 19:34:01,054 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 23 states and 25 transitions. [2021-10-21 19:34:01,054 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2021-10-21 19:34:01,054 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-10-21 19:34:01,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 25 transitions. [2021-10-21 19:34:01,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:34:01,055 INFO L681 BuchiCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-10-21 19:34:01,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 25 transitions. [2021-10-21 19:34:01,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-10-21 19:34:01,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:34:01,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-10-21 19:34:01,057 INFO L704 BuchiCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-21 19:34:01,057 INFO L587 BuchiCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-21 19:34:01,057 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-21 19:34:01,057 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states and 24 transitions. [2021-10-21 19:34:01,057 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-21 19:34:01,057 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:34:01,057 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:34:01,058 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:01,058 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-21 19:34:01,058 INFO L791 eck$LassoCheckResult]: Stem: 852#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 853#L-1 havoc main_#res;havoc main_#t~nondet8, main_#t~post7, main_#t~mem10, main_#t~post11, main_#t~post9, main_#t~mem13, main_#t~mem14, main_#t~post15, main_#t~post12, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 860#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 854#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 855#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 861#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 870#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 869#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 868#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 867#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 866#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 865#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 864#L18-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 862#L18-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 863#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 857#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 858#L26-3 assume !(main_~i~0 >= 0); 859#L26-4 main_~j~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296);main_~i~0 := 0; 850#L32-3 [2021-10-21 19:34:01,058 INFO L793 eck$LassoCheckResult]: Loop: 850#L32-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call main_#t~mem13 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call main_#t~mem14 := read~int(main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);__VERIFIER_assert_#in~cond := (if main_#t~mem13 == main_#t~mem14 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 856#L6 assume !(0 == __VERIFIER_assert_~cond); 851#L6-2 havoc main_#t~mem13;havoc main_#t~mem14;main_#t~post15 := main_~j~0;main_~j~0 := main_#t~post15 - 1;havoc main_#t~post15; 849#L32-2 main_#t~post12 := main_~i~0;main_~i~0 := 1 + main_#t~post12;havoc main_#t~post12; 850#L32-3 [2021-10-21 19:34:01,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:01,059 INFO L82 PathProgramCache]: Analyzing trace with hash -743540257, now seen corresponding path program 1 times [2021-10-21 19:34:01,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:01,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899820349] [2021-10-21 19:34:01,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:01,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:01,167 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-21 19:34:01,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:01,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899820349] [2021-10-21 19:34:01,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899820349] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:01,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81018037] [2021-10-21 19:34:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:01,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:01,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:01,169 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:01,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-21 19:34:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:01,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:34:01,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-21 19:34:01,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81018037] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:01,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:01,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-21 19:34:01,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434440318] [2021-10-21 19:34:01,436 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:34:01,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:01,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2100362, now seen corresponding path program 2 times [2021-10-21 19:34:01,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:01,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975978618] [2021-10-21 19:34:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:01,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:34:01,442 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:34:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:34:01,447 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:34:01,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:01,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:34:01,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:34:01,600 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. cyclomatic complexity: 5 Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:34:01,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:01,658 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-10-21 19:34:01,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:34:01,659 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 27 transitions. [2021-10-21 19:34:01,659 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-21 19:34:01,660 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 25 states and 27 transitions. [2021-10-21 19:34:01,660 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2021-10-21 19:34:01,660 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-10-21 19:34:01,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 27 transitions. [2021-10-21 19:34:01,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:34:01,660 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-10-21 19:34:01,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 27 transitions. [2021-10-21 19:34:01,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-10-21 19:34:01,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:34:01,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-10-21 19:34:01,662 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-10-21 19:34:01,663 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-10-21 19:34:01,663 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-10-21 19:34:01,663 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 26 transitions. [2021-10-21 19:34:01,663 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-21 19:34:01,663 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:34:01,663 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:34:01,664 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:01,664 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-21 19:34:01,664 INFO L791 eck$LassoCheckResult]: Stem: 965#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 966#L-1 havoc main_#res;havoc main_#t~nondet8, main_#t~post7, main_#t~mem10, main_#t~post11, main_#t~post9, main_#t~mem13, main_#t~mem14, main_#t~post15, main_#t~post12, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 973#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 967#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 968#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 974#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 985#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 984#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 983#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 982#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 980#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 979#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 978#L18-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 975#L18-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 976#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 970#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 971#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 977#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 981#L26-3 assume !(main_~i~0 >= 0); 972#L26-4 main_~j~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296);main_~i~0 := 0; 963#L32-3 [2021-10-21 19:34:01,664 INFO L793 eck$LassoCheckResult]: Loop: 963#L32-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call main_#t~mem13 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call main_#t~mem14 := read~int(main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);__VERIFIER_assert_#in~cond := (if main_#t~mem13 == main_#t~mem14 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 969#L6 assume !(0 == __VERIFIER_assert_~cond); 964#L6-2 havoc main_#t~mem13;havoc main_#t~mem14;main_#t~post15 := main_~j~0;main_~j~0 := main_#t~post15 - 1;havoc main_#t~post15; 962#L32-2 main_#t~post12 := main_~i~0;main_~i~0 := 1 + main_#t~post12;havoc main_#t~post12; 963#L32-3 [2021-10-21 19:34:01,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:01,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1577559391, now seen corresponding path program 2 times [2021-10-21 19:34:01,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:01,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419165615] [2021-10-21 19:34:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:01,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-21 19:34:01,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:01,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419165615] [2021-10-21 19:34:01,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419165615] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:01,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579109412] [2021-10-21 19:34:01,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:34:01,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:01,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:01,858 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:01,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-21 19:34:02,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:34:02,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:34:02,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:34:02,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-21 19:34:02,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579109412] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:02,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:02,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-10-21 19:34:02,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949697209] [2021-10-21 19:34:02,176 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:34:02,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:02,176 INFO L82 PathProgramCache]: Analyzing trace with hash 2100362, now seen corresponding path program 3 times [2021-10-21 19:34:02,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:02,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977142983] [2021-10-21 19:34:02,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:02,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:34:02,184 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:34:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:34:02,189 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:34:02,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:02,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:34:02,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:34:02,326 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. cyclomatic complexity: 5 Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-10-21 19:34:02,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:02,454 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-10-21 19:34:02,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:34:02,455 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 29 transitions. [2021-10-21 19:34:02,455 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-21 19:34:02,455 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 27 states and 29 transitions. [2021-10-21 19:34:02,456 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2021-10-21 19:34:02,456 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-10-21 19:34:02,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 29 transitions. [2021-10-21 19:34:02,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:34:02,456 INFO L681 BuchiCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-10-21 19:34:02,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 29 transitions. [2021-10-21 19:34:02,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-10-21 19:34:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 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) [2021-10-21 19:34:02,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-10-21 19:34:02,458 INFO L704 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-21 19:34:02,458 INFO L587 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-21 19:34:02,458 INFO L425 BuchiCegarLoop]: ======== Iteration 11============ [2021-10-21 19:34:02,458 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states and 28 transitions. [2021-10-21 19:34:02,459 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-21 19:34:02,459 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:34:02,459 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:34:02,460 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:02,460 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-21 19:34:02,463 INFO L791 eck$LassoCheckResult]: Stem: 1093#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1094#L-1 havoc main_#res;havoc main_#t~nondet8, main_#t~post7, main_#t~mem10, main_#t~post11, main_#t~post9, main_#t~mem13, main_#t~mem14, main_#t~post15, main_#t~post12, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 1101#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 1095#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 1096#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 1102#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 1114#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 1113#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 1112#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 1111#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 1108#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 1107#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 1106#L18-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 1103#L18-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 1104#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 1098#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 1099#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 1105#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 1115#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 1110#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 1109#L26-3 assume !(main_~i~0 >= 0); 1100#L26-4 main_~j~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296);main_~i~0 := 0; 1091#L32-3 [2021-10-21 19:34:02,463 INFO L793 eck$LassoCheckResult]: Loop: 1091#L32-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call main_#t~mem13 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call main_#t~mem14 := read~int(main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);__VERIFIER_assert_#in~cond := (if main_#t~mem13 == main_#t~mem14 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 1097#L6 assume !(0 == __VERIFIER_assert_~cond); 1092#L6-2 havoc main_#t~mem13;havoc main_#t~mem14;main_#t~post15 := main_~j~0;main_~j~0 := main_#t~post15 - 1;havoc main_#t~post15; 1090#L32-2 main_#t~post12 := main_~i~0;main_~i~0 := 1 + main_#t~post12;havoc main_#t~post12; 1091#L32-3 [2021-10-21 19:34:02,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:02,463 INFO L82 PathProgramCache]: Analyzing trace with hash 88937187, now seen corresponding path program 3 times [2021-10-21 19:34:02,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:02,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564845431] [2021-10-21 19:34:02,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:02,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-21 19:34:02,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:02,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564845431] [2021-10-21 19:34:02,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564845431] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:02,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202590059] [2021-10-21 19:34:02,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:34:02,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:02,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:02,683 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:02,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-21 19:34:02,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 19:34:02,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:34:02,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:34:02,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-21 19:34:03,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202590059] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:03,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:03,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-10-21 19:34:03,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899024916] [2021-10-21 19:34:03,074 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:34:03,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:03,074 INFO L82 PathProgramCache]: Analyzing trace with hash 2100362, now seen corresponding path program 4 times [2021-10-21 19:34:03,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:03,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091449320] [2021-10-21 19:34:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:03,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:34:03,082 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:34:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:34:03,090 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:34:03,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:03,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:34:03,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:34:03,201 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. cyclomatic complexity: 5 Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:34:03,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:03,362 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-10-21 19:34:03,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:34:03,362 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 29 states and 31 transitions. [2021-10-21 19:34:03,363 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-21 19:34:03,363 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 29 states to 29 states and 31 transitions. [2021-10-21 19:34:03,363 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2021-10-21 19:34:03,363 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-10-21 19:34:03,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 31 transitions. [2021-10-21 19:34:03,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:34:03,364 INFO L681 BuchiCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-10-21 19:34:03,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states and 31 transitions. [2021-10-21 19:34:03,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-10-21 19:34:03,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 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) [2021-10-21 19:34:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-21 19:34:03,366 INFO L704 BuchiCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-21 19:34:03,366 INFO L587 BuchiCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-21 19:34:03,366 INFO L425 BuchiCegarLoop]: ======== Iteration 12============ [2021-10-21 19:34:03,366 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 30 transitions. [2021-10-21 19:34:03,367 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-21 19:34:03,367 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:34:03,367 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:34:03,368 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:03,368 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-21 19:34:03,368 INFO L791 eck$LassoCheckResult]: Stem: 1235#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1236#L-1 havoc main_#res;havoc main_#t~nondet8, main_#t~post7, main_#t~mem10, main_#t~post11, main_#t~post9, main_#t~mem13, main_#t~mem14, main_#t~post15, main_#t~post12, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 1243#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 1238#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 1239#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 1244#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 1256#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 1255#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 1254#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 1253#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 1252#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 1249#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 1248#L18-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 1245#L18-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 1246#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 1240#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 1241#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 1247#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 1259#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 1258#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 1257#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 1251#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 1250#L26-3 assume !(main_~i~0 >= 0); 1242#L26-4 main_~j~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296);main_~i~0 := 0; 1233#L32-3 [2021-10-21 19:34:03,368 INFO L793 eck$LassoCheckResult]: Loop: 1233#L32-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call main_#t~mem13 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call main_#t~mem14 := read~int(main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);__VERIFIER_assert_#in~cond := (if main_#t~mem13 == main_#t~mem14 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 1237#L6 assume !(0 == __VERIFIER_assert_~cond); 1234#L6-2 havoc main_#t~mem13;havoc main_#t~mem14;main_#t~post15 := main_~j~0;main_~j~0 := main_#t~post15 - 1;havoc main_#t~post15; 1232#L32-2 main_#t~post12 := main_~i~0;main_~i~0 := 1 + main_#t~post12;havoc main_#t~post12; 1233#L32-3 [2021-10-21 19:34:03,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:03,368 INFO L82 PathProgramCache]: Analyzing trace with hash -430652763, now seen corresponding path program 4 times [2021-10-21 19:34:03,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:03,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52912065] [2021-10-21 19:34:03,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:03,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:03,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-21 19:34:03,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:03,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52912065] [2021-10-21 19:34:03,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52912065] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:03,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356224161] [2021-10-21 19:34:03,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:34:03,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:03,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:03,595 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:03,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-21 19:34:03,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:34:03,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:34:03,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:34:03,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-21 19:34:03,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356224161] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:03,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:03,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-21 19:34:03,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490199090] [2021-10-21 19:34:03,961 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:34:03,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:03,961 INFO L82 PathProgramCache]: Analyzing trace with hash 2100362, now seen corresponding path program 5 times [2021-10-21 19:34:03,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:03,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831675292] [2021-10-21 19:34:03,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:03,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:34:03,968 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:34:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:34:03,972 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:34:04,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:04,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:34:04,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:34:04,081 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. cyclomatic complexity: 5 Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-21 19:34:04,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:04,465 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-10-21 19:34:04,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:34:04,465 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 42 states and 44 transitions. [2021-10-21 19:34:04,466 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-21 19:34:04,467 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 42 states to 42 states and 44 transitions. [2021-10-21 19:34:04,467 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 22 [2021-10-21 19:34:04,467 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 22 [2021-10-21 19:34:04,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 44 transitions. [2021-10-21 19:34:04,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:34:04,468 INFO L681 BuchiCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-10-21 19:34:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 44 transitions. [2021-10-21 19:34:04,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2021-10-21 19:34:04,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:34:04,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-10-21 19:34:04,470 INFO L704 BuchiCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-10-21 19:34:04,471 INFO L587 BuchiCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-10-21 19:34:04,471 INFO L425 BuchiCegarLoop]: ======== Iteration 13============ [2021-10-21 19:34:04,471 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 30 states and 32 transitions. [2021-10-21 19:34:04,471 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-21 19:34:04,471 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:34:04,472 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:34:04,472 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:04,472 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-21 19:34:04,473 INFO L791 eck$LassoCheckResult]: Stem: 1407#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1408#L-1 havoc main_#res;havoc main_#t~nondet8, main_#t~post7, main_#t~mem10, main_#t~post11, main_#t~post9, main_#t~mem13, main_#t~mem14, main_#t~post15, main_#t~post12, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.allocOnStack((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 1416#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 1410#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 1411#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 1417#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 1433#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 1431#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 1429#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 1427#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 1425#L18-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet8, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet8; 1422#L18-2 main_#t~post7 := main_~i~0;main_~i~0 := 1 + main_#t~post7;havoc main_#t~post7; 1421#L18-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 1418#L18-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 1419#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 1413#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 1414#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 1420#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 1434#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 1432#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 1430#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 1428#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 1426#L26-3 assume !!(main_~i~0 >= 0);call main_#t~mem10 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem10, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem10;main_#t~post11 := main_~j~0;main_~j~0 := 1 + main_#t~post11;havoc main_#t~post11; 1424#L26-2 main_#t~post9 := main_~i~0;main_~i~0 := main_#t~post9 - 1;havoc main_#t~post9; 1423#L26-3 assume !(main_~i~0 >= 0); 1415#L26-4 main_~j~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296);main_~i~0 := 0; 1406#L32-3 [2021-10-21 19:34:04,473 INFO L793 eck$LassoCheckResult]: Loop: 1406#L32-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call main_#t~mem13 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call main_#t~mem14 := read~int(main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);__VERIFIER_assert_#in~cond := (if main_#t~mem13 == main_#t~mem14 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 1412#L6 assume !(0 == __VERIFIER_assert_~cond); 1409#L6-2 havoc main_#t~mem13;havoc main_#t~mem14;main_#t~post15 := main_~j~0;main_~j~0 := main_#t~post15 - 1;havoc main_#t~post15; 1405#L32-2 main_#t~post12 := main_~i~0;main_~i~0 := 1 + main_#t~post12;havoc main_#t~post12; 1406#L32-3 [2021-10-21 19:34:04,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:04,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1540388377, now seen corresponding path program 5 times [2021-10-21 19:34:04,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:04,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168765337] [2021-10-21 19:34:04,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:04,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:34:04,505 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:34:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:34:04,538 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:34:04,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:04,539 INFO L82 PathProgramCache]: Analyzing trace with hash 2100362, now seen corresponding path program 6 times [2021-10-21 19:34:04,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:04,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99981901] [2021-10-21 19:34:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:04,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:34:04,545 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:34:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:34:04,549 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:34:04,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:04,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1945357456, now seen corresponding path program 1 times [2021-10-21 19:34:04,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:04,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455056968] [2021-10-21 19:34:04,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:04,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:34:04,585 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:34:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:34:04,623 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:34:20,398 WARN L207 SmtUtils]: Spent 15.66 s on a formula simplification. DAG size of input: 312 DAG size of output: 237 [2021-10-21 19:34:32,870 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:34:32,870 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:34:32,870 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:34:32,871 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:34:32,871 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 19:34:32,871 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:34:32,871 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:34:32,871 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:34:32,871 INFO L133 ssoRankerPreferences]: Filename of dumped script: invert_string-3.c_Iteration13_Lasso [2021-10-21 19:34:32,871 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:34:32,871 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:34:32,871 WARN L313 ript$VariableManager]: TermVariabe aux_div_v_ULTIMATE.start_main_~i~0_123_62 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:34:32,871 WARN L313 ript$VariableManager]: TermVariabe aux_mod_aux_mod_v_ULTIMATE.start_main_~i~0_123_62_64 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:34:32,871 WARN L313 ript$VariableManager]: TermVariabe aux_div_aux_mod_v_ULTIMATE.start_main_~i~0_123_62_64 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:34:32,875 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:34:32,888 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:34:32,890 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:34:32,892 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:34:32,894 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:34:32,896 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:34:32,897 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:34:32,900 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:34:34,773 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer has thrown an exception: java.lang.AssertionError: MapEliminator tries to combine Int and (Array Int Int) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.mapelimination.MapEliminator.indexEqualityInequalityImpliesValueEquality(MapEliminator.java:850) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.mapelimination.MapEliminator.replaceSelectStoreTerm(MapEliminator.java:592) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.mapelimination.MapEliminator.replaceStoreTerms(MapEliminator.java:542) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.mapelimination.MapEliminator.getRewrittenTransFormula(MapEliminator.java:330) at de.uni_freiburg.informatik.ultimate.lassoranker.preprocessors.MapEliminationLassoPreprocessor.process(MapEliminationLassoPreprocessor.java:109) at de.uni_freiburg.informatik.ultimate.lassoranker.variables.LassoBuilder.applyPreprocessor(LassoBuilder.java:154) at de.uni_freiburg.informatik.ultimate.lassoranker.variables.LassoBuilder.preprocess(LassoBuilder.java:262) at de.uni_freiburg.informatik.ultimate.lassoranker.LassoAnalysis.preprocess(LassoAnalysis.java:280) at de.uni_freiburg.informatik.ultimate.lassoranker.LassoAnalysis.(LassoAnalysis.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck.synthesize(LassoCheck.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck$LassoCheckResult.checkLassoTermination(LassoCheck.java:953) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck$LassoCheckResult.(LassoCheck.java:862) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck.(LassoCheck.java:252) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiCegarLoop.iterate(BuchiCegarLoop.java:457) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.doTerminationAnalysis(BuchiAutomizerObserver.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.finish(BuchiAutomizerObserver.java:398) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-21 19:34:34,776 INFO L168 Benchmark]: Toolchain (without parser) took 48517.87 ms. Allocated memory was 100.7 MB in the beginning and 148.9 MB in the end (delta: 48.2 MB). Free memory was 60.0 MB in the beginning and 52.1 MB in the end (delta: 7.9 MB). Peak memory consumption was 89.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:34:34,777 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 100.7 MB. Free memory is still 76.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:34:34,778 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.03 ms. Allocated memory is still 100.7 MB. Free memory was 59.8 MB in the beginning and 76.2 MB in the end (delta: -16.4 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-10-21 19:34:34,778 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.59 ms. Allocated memory is still 100.7 MB. Free memory was 76.2 MB in the beginning and 74.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:34:34,778 INFO L168 Benchmark]: Boogie Preprocessor took 27.73 ms. Allocated memory is still 100.7 MB. Free memory was 74.6 MB in the beginning and 73.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:34:34,779 INFO L168 Benchmark]: RCFGBuilder took 302.34 ms. Allocated memory is still 100.7 MB. Free memory was 73.3 MB in the beginning and 62.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:34:34,783 INFO L168 Benchmark]: BuchiAutomizer took 47914.23 ms. Allocated memory was 100.7 MB in the beginning and 148.9 MB in the end (delta: 48.2 MB). Free memory was 62.3 MB in the beginning and 52.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 94.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:34:34,785 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 100.7 MB. Free memory is still 76.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 236.03 ms. Allocated memory is still 100.7 MB. Free memory was 59.8 MB in the beginning and 76.2 MB in the end (delta: -16.4 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.59 ms. Allocated memory is still 100.7 MB. Free memory was 76.2 MB in the beginning and 74.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.73 ms. Allocated memory is still 100.7 MB. Free memory was 74.6 MB in the beginning and 73.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 302.34 ms. Allocated memory is still 100.7 MB. Free memory was 73.3 MB in the beginning and 62.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 47914.23 ms. Allocated memory was 100.7 MB in the beginning and 148.9 MB in the end (delta: 48.2 MB). Free memory was 62.3 MB in the beginning and 52.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 94.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: - ExceptionOrErrorResult: AssertionError: MapEliminator tries to combine Int and (Array Int Int) de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: AssertionError: MapEliminator tries to combine Int and (Array Int Int): de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.mapelimination.MapEliminator.indexEqualityInequalityImpliesValueEquality(MapEliminator.java:850) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-21 19:34:34,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:35,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:35,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:35,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:35,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-10-21 19:34:35,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-21 19:34:36,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-21 19:34:36,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-21 19:34:36,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c98227-189c-4e1c-8789-d6f135cbfa61/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...