./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 b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/loops/invert_string-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg --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_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/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-b2eff8b [2021-10-28 09:11:10,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:11:10,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:11:10,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:11:10,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:11:10,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:11:10,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:11:10,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:11:10,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:11:10,965 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:11:10,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:11:10,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:11:10,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:11:10,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:11:10,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:11:10,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:11:10,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:11:10,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:11:10,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:11:10,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:11:11,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:11:11,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:11:11,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:11:11,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:11:11,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:11:11,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:11:11,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:11:11,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:11:11,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:11:11,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:11:11,032 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:11:11,033 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:11:11,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:11:11,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:11:11,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:11:11,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:11:11,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:11:11,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:11:11,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:11:11,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:11:11,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:11:11,046 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-10-28 09:11:11,118 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:11:11,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:11:11,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:11:11,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:11:11,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:11:11,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:11:11,127 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:11:11,127 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-28 09:11:11,127 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-28 09:11:11,127 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-28 09:11:11,129 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-28 09:11:11,129 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-28 09:11:11,130 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-28 09:11:11,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:11:11,130 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:11:11,130 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:11:11,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:11:11,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:11:11,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:11:11,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-28 09:11:11,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-28 09:11:11,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-28 09:11:11,133 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:11:11,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:11:11,133 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-28 09:11:11,133 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:11:11,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-28 09:11:11,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:11:11,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:11:11,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:11:11,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:11:11,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:11:11,139 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-28 09:11:11,139 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_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca98535e808a51f7cfa7d21c9d33f259821212a6554e27f29c2bddd9197c0249 [2021-10-28 09:11:11,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:11:11,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:11:11,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:11:11,536 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:11:11,538 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:11:11,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/loops/invert_string-3.c [2021-10-28 09:11:11,639 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/data/5e23964b7/997e64c1a7464c7d8d497a945c46b205/FLAG08478d40a [2021-10-28 09:11:12,183 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:11:12,183 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/sv-benchmarks/c/loops/invert_string-3.c [2021-10-28 09:11:12,196 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/data/5e23964b7/997e64c1a7464c7d8d497a945c46b205/FLAG08478d40a [2021-10-28 09:11:12,508 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/data/5e23964b7/997e64c1a7464c7d8d497a945c46b205 [2021-10-28 09:11:12,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:11:12,516 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:11:12,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:11:12,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:11:12,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:11:12,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:11:12" (1/1) ... [2021-10-28 09:11:12,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@752ef7cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:12, skipping insertion in model container [2021-10-28 09:11:12,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:11:12" (1/1) ... [2021-10-28 09:11:12,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:11:12,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:11:12,735 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_ac2adead-9bb2-431a-8a2e-1e491bc888a1/sv-benchmarks/c/loops/invert_string-3.c[327,340] [2021-10-28 09:11:12,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:11:12,762 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:11:12,775 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_ac2adead-9bb2-431a-8a2e-1e491bc888a1/sv-benchmarks/c/loops/invert_string-3.c[327,340] [2021-10-28 09:11:12,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:11:12,799 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:11:12,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:12 WrapperNode [2021-10-28 09:11:12,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:11:12,801 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:11:12,801 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:11:12,801 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:11:12,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:12" (1/1) ... [2021-10-28 09:11:12,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:12" (1/1) ... [2021-10-28 09:11:12,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:11:12,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:11:12,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:11:12,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:11:12,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:12" (1/1) ... [2021-10-28 09:11:12,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:12" (1/1) ... [2021-10-28 09:11:12,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:12" (1/1) ... [2021-10-28 09:11:12,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:12" (1/1) ... [2021-10-28 09:11:12,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:12" (1/1) ... [2021-10-28 09:11:12,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:12" (1/1) ... [2021-10-28 09:11:12,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:12" (1/1) ... [2021-10-28 09:11:12,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:11:12,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:11:12,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:11:12,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:11:12,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:12" (1/1) ... [2021-10-28 09:11:12,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:12,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:12,915 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:12,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-28 09:11:12,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:11:12,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:11:12,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:11:12,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:11:12,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:11:12,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 09:11:12,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:11:13,335 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:11:13,336 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-28 09:11:13,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:11:13 BoogieIcfgContainer [2021-10-28 09:11:13,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:11:13,339 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-28 09:11:13,339 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-28 09:11:13,343 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-28 09:11:13,344 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:11:13,344 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.10 09:11:12" (1/3) ... [2021-10-28 09:11:13,346 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@73324b5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 09:11:13, skipping insertion in model container [2021-10-28 09:11:13,346 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:11:13,346 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:11:12" (2/3) ... [2021-10-28 09:11:13,347 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@73324b5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 09:11:13, skipping insertion in model container [2021-10-28 09:11:13,347 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:11:13,347 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:11:13" (3/3) ... [2021-10-28 09:11:13,349 INFO L389 chiAutomizerObserver]: Analyzing ICFG invert_string-3.c [2021-10-28 09:11:13,396 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-28 09:11:13,397 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-28 09:11:13,397 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-28 09:11:13,397 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-28 09:11:13,398 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-28 09:11:13,398 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-28 09:11:13,398 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-28 09:11:13,398 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-28 09:11:13,413 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) [2021-10-28 09:11:13,431 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2021-10-28 09:11:13,431 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:11:13,431 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:11:13,438 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 09:11:13,444 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-28 09:11:13,444 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-28 09:11:13,450 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) [2021-10-28 09:11:13,461 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2021-10-28 09:11:13,461 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:11:13,461 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:11:13,462 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 09:11:13,462 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-28 09:11:13,468 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 [2021-10-28 09:11:13,469 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 [2021-10-28 09:11:13,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:13,479 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-10-28 09:11:13,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:13,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120049731] [2021-10-28 09:11:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:13,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:13,651 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:11:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:13,741 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:11:13,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:13,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1283, now seen corresponding path program 1 times [2021-10-28 09:11:13,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:13,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384566208] [2021-10-28 09:11:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:13,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:13,800 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:11:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:13,814 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:11:13,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:13,817 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-10-28 09:11:13,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:13,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464561642] [2021-10-28 09:11:13,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:13,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:13,899 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:11:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:13,962 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:11:15,153 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:11:15,154 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:11:15,154 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:11:15,154 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:11:15,154 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:11:15,155 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:15,156 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:11:15,156 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:11:15,156 INFO L133 ssoRankerPreferences]: Filename of dumped script: invert_string-3.c_Iteration1_Lasso [2021-10-28 09:11:15,157 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:11:15,157 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:11:15,191 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:15,198 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:15,203 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:15,206 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:15,209 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:15,213 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:15,217 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:15,221 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:15,224 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:15,232 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:15,237 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:15,577 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:15,581 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:15,584 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:15,587 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:15,591 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:15,997 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:11:16,003 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:11:16,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:16,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:16,008 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:16,022 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 [2021-10-28 09:11:16,032 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:16,032 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:11:16,033 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:16,033 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:16,033 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:16,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-28 09:11:16,036 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:11:16,038 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:11:16,053 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:16,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:16,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:16,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:16,095 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:16,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-28 09:11:16,100 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 [2021-10-28 09:11:16,111 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:16,111 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:16,111 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:16,111 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:16,115 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:16,116 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:16,133 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:16,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:16,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:16,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:16,173 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:16,182 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 [2021-10-28 09:11:16,191 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:16,191 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:11:16,192 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:16,192 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:16,192 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:16,193 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:11:16,193 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:11:16,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-28 09:11:16,209 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:16,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2021-10-28 09:11:16,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:16,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:16,247 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:16,253 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 [2021-10-28 09:11:16,263 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:16,263 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:11:16,263 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:16,263 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:16,263 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:16,264 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:11:16,264 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:11:16,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-28 09:11:16,281 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:16,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:16,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:16,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:16,312 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:16,318 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 [2021-10-28 09:11:16,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-28 09:11:16,327 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:16,327 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:16,327 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:16,328 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:16,333 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:16,333 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:16,361 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:16,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:16,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:16,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:16,406 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:16,418 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 [2021-10-28 09:11:16,429 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:16,448 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:16,448 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:16,448 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:16,455 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:16,455 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:16,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-28 09:11:16,461 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:16,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2021-10-28 09:11:16,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:16,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:16,498 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:16,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-28 09:11:16,506 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 [2021-10-28 09:11:16,514 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:16,514 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:11:16,515 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:16,515 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:16,515 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:16,515 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:11:16,515 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:11:16,527 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:16,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:16,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:16,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:16,550 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:16,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-28 09:11:16,552 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 [2021-10-28 09:11:16,559 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:16,559 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:11:16,559 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:16,559 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:16,559 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:16,560 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:11:16,560 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:11:16,564 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:16,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:16,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:16,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:16,593 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:16,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-28 09:11:16,595 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 [2021-10-28 09:11:16,604 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:16,605 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:16,605 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:16,605 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:16,608 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:16,608 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:16,661 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:16,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:16,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:16,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:16,709 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:16,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-28 09:11:16,713 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 [2021-10-28 09:11:16,722 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:16,722 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:11:16,722 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:16,722 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:16,722 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:16,723 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:11:16,723 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:11:16,724 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:16,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2021-10-28 09:11:16,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:16,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:16,755 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:16,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-28 09:11:16,757 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 [2021-10-28 09:11:16,767 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:16,768 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:16,768 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:16,768 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:16,771 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:16,772 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:16,784 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:16,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:16,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:16,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:16,815 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:16,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-28 09:11:16,821 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 [2021-10-28 09:11:16,830 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:16,830 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:16,830 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:16,831 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:16,834 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:16,834 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:16,849 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:16,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:16,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:16,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:16,878 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:16,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-28 09:11:16,880 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 [2021-10-28 09:11:16,888 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:16,889 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:11:16,889 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:16,889 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:16,889 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:16,890 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:11:16,890 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:11:16,905 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:16,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:16,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:16,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:16,933 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:16,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-28 09:11:16,935 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 [2021-10-28 09:11:16,943 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:16,943 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:16,943 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:16,943 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:16,945 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:16,945 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:16,949 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:16,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:16,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:16,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:16,977 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:16,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-28 09:11:16,979 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 [2021-10-28 09:11:16,990 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:16,991 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:16,991 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:16,991 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:16,994 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:16,994 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:17,017 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:17,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:17,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:17,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:17,064 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:17,074 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 [2021-10-28 09:11:17,086 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:17,086 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:17,086 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:17,087 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:17,089 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:17,089 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:17,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-28 09:11:17,105 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:17,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:17,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:17,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:17,150 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:17,156 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 [2021-10-28 09:11:17,167 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:17,167 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:17,167 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:17,168 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:17,173 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:17,173 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:17,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-28 09:11:17,193 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:17,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:17,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:17,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:17,226 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:17,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-28 09:11:17,228 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 [2021-10-28 09:11:17,236 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:17,236 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:17,237 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:17,237 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:17,240 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:17,240 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:17,245 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:17,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:17,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:17,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:17,270 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:17,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-28 09:11:17,274 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 [2021-10-28 09:11:17,284 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:17,285 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:17,285 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:17,285 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:17,288 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:17,288 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:17,305 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:17,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2021-10-28 09:11:17,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:17,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:17,334 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:17,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-10-28 09:11:17,340 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 [2021-10-28 09:11:17,348 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:17,348 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:17,348 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:17,348 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:17,350 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:17,350 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:17,373 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:17,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:17,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:17,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:17,398 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:17,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-10-28 09:11:17,399 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 [2021-10-28 09:11:17,408 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:17,409 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:11:17,409 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:17,409 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:17,409 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:17,410 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:11:17,410 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:11:17,414 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:17,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Ended with exit code 0 [2021-10-28 09:11:17,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:17,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:17,438 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:17,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-10-28 09:11:17,440 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 [2021-10-28 09:11:17,448 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:17,448 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:17,448 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:17,449 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:17,451 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:17,451 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:17,481 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:17,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:17,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:17,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:17,529 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:17,538 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 [2021-10-28 09:11:17,549 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:17,549 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:17,550 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:17,550 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:17,553 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:17,553 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:17,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-10-28 09:11:17,564 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:17,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:17,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:17,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:17,610 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:17,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-10-28 09:11:17,611 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 [2021-10-28 09:11:17,619 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:17,620 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:17,620 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:17,620 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:17,636 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:17,636 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:17,661 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:11:17,750 INFO L443 ModelExtractionUtils]: Simplification made 10 calls to the SMT solver. [2021-10-28 09:11:17,751 INFO L444 ModelExtractionUtils]: 3 out of 22 variables were initially zero. Simplification set additionally 15 variables to zero. [2021-10-28 09:11:17,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:17,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:17,754 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:17,757 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:11:17,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-28 09:11:17,798 INFO L438 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 2. [2021-10-28 09:11:17,798 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:11:17,799 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(v_rep(select #length ULTIMATE.start_main_~#str1~0.base)_1, ULTIMATE.start_main_~i~0, ULTIMATE.start_main_~#str1~0.offset) = 1*v_rep(select #length ULTIMATE.start_main_~#str1~0.base)_1 - 1*ULTIMATE.start_main_~i~0 - 1*ULTIMATE.start_main_~#str1~0.offset Supporting invariants [] [2021-10-28 09:11:17,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2021-10-28 09:11:17,971 INFO L297 tatePredicateManager]: 16 out of 16 supporting invariants were superfluous and have been removed [2021-10-28 09:11:18,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:18,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 09:11:18,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:11:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:18,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:11:18,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:11:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:11:18,125 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 [2021-10-28 09:11:18,126 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) [2021-10-28 09:11:18,208 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. [2021-10-28 09:11:18,209 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 [2021-10-28 09:11:18,211 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) [2021-10-28 09:11:18,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 23 transitions. [2021-10-28 09:11:18,214 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 23 transitions. Stem has 2 letters. Loop has 2 letters. [2021-10-28 09:11:18,215 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:11:18,215 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 23 transitions. Stem has 4 letters. Loop has 2 letters. [2021-10-28 09:11:18,215 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:11:18,216 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 23 transitions. Stem has 2 letters. Loop has 4 letters. [2021-10-28 09:11:18,216 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:11:18,217 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 47 transitions. [2021-10-28 09:11:18,224 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2021-10-28 09:11:18,228 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 14 states and 19 transitions. [2021-10-28 09:11:18,229 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-10-28 09:11:18,230 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2021-10-28 09:11:18,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 19 transitions. [2021-10-28 09:11:18,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:11:18,232 INFO L681 BuchiCegarLoop]: Abstraction has 14 states and 19 transitions. [2021-10-28 09:11:18,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 19 transitions. [2021-10-28 09:11:18,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-28 09:11:18,268 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) [2021-10-28 09:11:18,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2021-10-28 09:11:18,274 INFO L704 BuchiCegarLoop]: Abstraction has 14 states and 19 transitions. [2021-10-28 09:11:18,275 INFO L587 BuchiCegarLoop]: Abstraction has 14 states and 19 transitions. [2021-10-28 09:11:18,275 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-28 09:11:18,275 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 19 transitions. [2021-10-28 09:11:18,276 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2021-10-28 09:11:18,276 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:11:18,276 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:11:18,276 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-10-28 09:11:18,276 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-28 09:11:18,277 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 [2021-10-28 09:11:18,277 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 [2021-10-28 09:11:18,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:18,278 INFO L85 PathProgramCache]: Analyzing trace with hash 925707, now seen corresponding path program 1 times [2021-10-28 09:11:18,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:18,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125809850] [2021-10-28 09:11:18,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:18,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:11:18,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:11:18,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125809850] [2021-10-28 09:11:18,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125809850] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:11:18,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:11:18,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:11:18,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415562343] [2021-10-28 09:11:18,489 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:11:18,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:18,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1731, now seen corresponding path program 1 times [2021-10-28 09:11:18,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:18,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653869214] [2021-10-28 09:11:18,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:18,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:18,497 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:11:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:18,506 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:11:18,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:11:18,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:11:18,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:11:18,623 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) [2021-10-28 09:11:18,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:11:18,664 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-10-28 09:11:18,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:11:18,665 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 17 transitions. [2021-10-28 09:11:18,666 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-28 09:11:18,667 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 14 states and 16 transitions. [2021-10-28 09:11:18,667 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-10-28 09:11:18,667 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-10-28 09:11:18,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 16 transitions. [2021-10-28 09:11:18,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:11:18,668 INFO L681 BuchiCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-28 09:11:18,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 16 transitions. [2021-10-28 09:11:18,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-10-28 09:11:18,670 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) [2021-10-28 09:11:18,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-10-28 09:11:18,671 INFO L704 BuchiCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-10-28 09:11:18,671 INFO L587 BuchiCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-10-28 09:11:18,671 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-28 09:11:18,671 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 15 transitions. [2021-10-28 09:11:18,672 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-28 09:11:18,672 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:11:18,672 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:11:18,672 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2021-10-28 09:11:18,673 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-28 09:11:18,673 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 [2021-10-28 09:11:18,673 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 [2021-10-28 09:11:18,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:18,674 INFO L85 PathProgramCache]: Analyzing trace with hash 889660429, now seen corresponding path program 1 times [2021-10-28 09:11:18,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:18,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635184260] [2021-10-28 09:11:18,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:18,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:11:18,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:11:18,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635184260] [2021-10-28 09:11:18,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635184260] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:18,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411188743] [2021-10-28 09:11:18,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:18,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:11:18,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:18,800 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:11:18,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 09:11:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:18,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:11:18,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:11:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:11:18,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411188743] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:18,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:11:18,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-28 09:11:18,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456992775] [2021-10-28 09:11:18,939 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:11:18,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:18,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1731, now seen corresponding path program 2 times [2021-10-28 09:11:18,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:18,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412245683] [2021-10-28 09:11:18,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:18,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:18,964 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:11:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:18,979 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:11:19,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:11:19,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:11:19,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:11:19,086 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) [2021-10-28 09:11:19,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:11:19,152 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-10-28 09:11:19,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:11:19,153 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 18 transitions. [2021-10-28 09:11:19,154 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-28 09:11:19,155 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 16 states and 18 transitions. [2021-10-28 09:11:19,155 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-10-28 09:11:19,155 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-10-28 09:11:19,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 18 transitions. [2021-10-28 09:11:19,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:11:19,156 INFO L681 BuchiCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-10-28 09:11:19,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 18 transitions. [2021-10-28 09:11:19,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-10-28 09:11:19,157 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) [2021-10-28 09:11:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-10-28 09:11:19,158 INFO L704 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-28 09:11:19,158 INFO L587 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-28 09:11:19,158 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-28 09:11:19,158 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 17 transitions. [2021-10-28 09:11:19,159 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-28 09:11:19,163 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:11:19,163 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:11:19,164 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1] [2021-10-28 09:11:19,164 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-28 09:11:19,164 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 [2021-10-28 09:11:19,164 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 [2021-10-28 09:11:19,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:19,165 INFO L85 PathProgramCache]: Analyzing trace with hash 265236367, now seen corresponding path program 2 times [2021-10-28 09:11:19,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:19,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227662353] [2021-10-28 09:11:19,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:19,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:11:19,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:11:19,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227662353] [2021-10-28 09:11:19,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227662353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:19,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059561950] [2021-10-28 09:11:19,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:11:19,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:11:19,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:19,391 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:11:19,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 09:11:19,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:11:19,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:11:19,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 09:11:19,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:11:19,563 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 [2021-10-28 09:11:19,588 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 09:11:19,588 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 [2021-10-28 09:11:19,607 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-28 09:11:19,608 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 [2021-10-28 09:11:19,670 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 [2021-10-28 09:11:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:11:19,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059561950] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:19,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:11:19,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-10-28 09:11:19,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972412476] [2021-10-28 09:11:19,973 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:11:19,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:19,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1731, now seen corresponding path program 3 times [2021-10-28 09:11:19,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:19,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984053666] [2021-10-28 09:11:19,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:19,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:19,987 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:11:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:20,005 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:11:20,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:11:20,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:11:20,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:11:20,083 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) [2021-10-28 09:11:20,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:11:20,206 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-10-28 09:11:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:11:20,206 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18 states and 20 transitions. [2021-10-28 09:11:20,207 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-28 09:11:20,208 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18 states to 18 states and 20 transitions. [2021-10-28 09:11:20,208 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-10-28 09:11:20,208 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-10-28 09:11:20,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 20 transitions. [2021-10-28 09:11:20,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:11:20,208 INFO L681 BuchiCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-10-28 09:11:20,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 20 transitions. [2021-10-28 09:11:20,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-10-28 09:11:20,210 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) [2021-10-28 09:11:20,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-28 09:11:20,211 INFO L704 BuchiCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-28 09:11:20,211 INFO L587 BuchiCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-28 09:11:20,211 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-28 09:11:20,211 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 19 transitions. [2021-10-28 09:11:20,212 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-28 09:11:20,212 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:11:20,212 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:11:20,212 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 3, 1, 1, 1, 1] [2021-10-28 09:11:20,212 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-28 09:11:20,212 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 [2021-10-28 09:11:20,213 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 [2021-10-28 09:11:20,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:20,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1489134225, now seen corresponding path program 3 times [2021-10-28 09:11:20,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:20,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785309949] [2021-10-28 09:11:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:20,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:11:20,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:11:20,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785309949] [2021-10-28 09:11:20,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785309949] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:20,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189765063] [2021-10-28 09:11:20,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:11:20,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:11:20,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:20,434 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:11:20,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 09:11:20,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 09:11:20,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:11:20,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 09:11:20,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:11:20,601 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 [2021-10-28 09:11:20,621 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-28 09:11:20,622 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 [2021-10-28 09:11:20,638 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 09:11:20,638 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 [2021-10-28 09:11:20,682 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 [2021-10-28 09:11:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:11:21,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189765063] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:21,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:11:21,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-10-28 09:11:21,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976456014] [2021-10-28 09:11:21,042 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:11:21,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:21,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1731, now seen corresponding path program 4 times [2021-10-28 09:11:21,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:21,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966817339] [2021-10-28 09:11:21,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:21,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:21,050 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:11:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:21,057 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:11:21,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:11:21,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:11:21,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:11:21,146 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) [2021-10-28 09:11:21,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:11:21,274 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-10-28 09:11:21,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:11:21,275 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 20 states and 22 transitions. [2021-10-28 09:11:21,276 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-28 09:11:21,277 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 20 states to 20 states and 22 transitions. [2021-10-28 09:11:21,277 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-10-28 09:11:21,277 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-10-28 09:11:21,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 22 transitions. [2021-10-28 09:11:21,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:11:21,278 INFO L681 BuchiCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-10-28 09:11:21,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 22 transitions. [2021-10-28 09:11:21,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-10-28 09:11:21,280 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) [2021-10-28 09:11:21,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-10-28 09:11:21,281 INFO L704 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-10-28 09:11:21,281 INFO L587 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-10-28 09:11:21,281 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-28 09:11:21,281 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 21 transitions. [2021-10-28 09:11:21,282 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-28 09:11:21,282 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:11:21,282 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:11:21,283 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 1, 1, 1, 1] [2021-10-28 09:11:21,283 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-28 09:11:21,283 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 [2021-10-28 09:11:21,283 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 [2021-10-28 09:11:21,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:21,284 INFO L85 PathProgramCache]: Analyzing trace with hash 833936659, now seen corresponding path program 4 times [2021-10-28 09:11:21,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:21,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272808539] [2021-10-28 09:11:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:21,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:11:21,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:11:21,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272808539] [2021-10-28 09:11:21,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272808539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:21,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106316677] [2021-10-28 09:11:21,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:11:21,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:11:21,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:21,493 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:11:21,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-28 09:11:21,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:11:21,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:11:21,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 09:11:21,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:11:21,685 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 09:11:21,686 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 [2021-10-28 09:11:21,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-28 09:11:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:11:21,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106316677] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:21,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:11:21,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-10-28 09:11:21,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61315253] [2021-10-28 09:11:21,964 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:11:21,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:21,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1731, now seen corresponding path program 5 times [2021-10-28 09:11:21,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:21,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149934733] [2021-10-28 09:11:21,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:21,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:21,973 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:11:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:21,982 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:11:22,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:11:22,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:11:22,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:11:22,076 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) [2021-10-28 09:11:22,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:11:22,262 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-10-28 09:11:22,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:11:22,263 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 24 transitions. [2021-10-28 09:11:22,264 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-28 09:11:22,264 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 22 states and 24 transitions. [2021-10-28 09:11:22,264 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-10-28 09:11:22,264 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-10-28 09:11:22,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 24 transitions. [2021-10-28 09:11:22,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:11:22,265 INFO L681 BuchiCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-28 09:11:22,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states and 24 transitions. [2021-10-28 09:11:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-10-28 09:11:22,267 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) [2021-10-28 09:11:22,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-10-28 09:11:22,268 INFO L704 BuchiCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-10-28 09:11:22,268 INFO L587 BuchiCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-10-28 09:11:22,268 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-28 09:11:22,268 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 23 transitions. [2021-10-28 09:11:22,269 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-28 09:11:22,269 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:11:22,269 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:11:22,270 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 1, 1, 1, 1] [2021-10-28 09:11:22,270 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-28 09:11:22,270 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 [2021-10-28 09:11:22,271 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 [2021-10-28 09:11:22,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:22,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1745699051, now seen corresponding path program 5 times [2021-10-28 09:11:22,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:22,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296744796] [2021-10-28 09:11:22,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:22,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:22,292 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:11:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:22,318 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:11:22,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:22,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1731, now seen corresponding path program 6 times [2021-10-28 09:11:22,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:22,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60805385] [2021-10-28 09:11:22,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:22,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:22,325 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:11:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:22,330 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:11:22,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:22,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1715425495, now seen corresponding path program 1 times [2021-10-28 09:11:22,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:22,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442391784] [2021-10-28 09:11:22,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:22,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:22,357 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:11:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:22,387 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:11:27,205 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:11:27,205 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:11:27,205 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:11:27,206 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:11:27,206 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:11:27,206 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:27,206 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:11:27,206 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:11:27,206 INFO L133 ssoRankerPreferences]: Filename of dumped script: invert_string-3.c_Iteration7_Lasso [2021-10-28 09:11:27,206 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:11:27,206 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:11:27,206 WARN L313 ript$VariableManager]: TermVariabe aux_div_aux_mod_v_ULTIMATE.start_main_~i~0_60_61_63 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:11:27,206 WARN L313 ript$VariableManager]: TermVariabe aux_div_v_ULTIMATE.start_main_~i~0_60_61 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:11:27,206 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. [2021-10-28 09:11:27,212 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:27,219 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:27,820 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:27,823 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:27,826 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:27,829 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:27,831 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:27,834 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:27,837 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:27,840 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:27,843 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:27,845 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:27,848 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:27,851 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:27,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:11:28,347 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:11:28,348 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:11:28,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:28,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:28,355 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:28,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-28 09:11:28,358 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 [2021-10-28 09:11:28,367 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:28,367 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:28,368 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:28,368 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:28,370 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:28,371 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:28,414 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:28,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:28,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:28,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:28,462 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:28,466 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 [2021-10-28 09:11:28,476 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:28,476 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:28,477 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:28,477 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:28,479 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:28,479 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:28,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-10-28 09:11:28,495 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:28,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:28,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:28,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:28,537 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:28,540 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 [2021-10-28 09:11:28,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-28 09:11:28,551 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:28,553 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:28,553 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:28,553 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:28,555 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:28,556 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:28,574 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:28,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:28,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:28,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:28,617 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:28,620 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 [2021-10-28 09:11:28,630 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:28,630 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:28,630 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:28,631 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:28,632 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:28,632 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:28,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-28 09:11:28,647 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:28,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2021-10-28 09:11:28,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:28,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:28,672 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:28,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-10-28 09:11:28,674 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 [2021-10-28 09:11:28,683 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:28,683 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:11:28,683 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:28,683 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:28,683 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:28,684 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:11:28,684 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:11:28,697 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:28,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:28,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:28,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:28,743 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:28,746 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 [2021-10-28 09:11:28,757 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:28,757 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:28,757 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:28,757 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:28,759 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:28,759 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:28,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-10-28 09:11:28,773 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:28,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Ended with exit code 0 [2021-10-28 09:11:28,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:28,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:28,809 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:28,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-10-28 09:11:28,813 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 [2021-10-28 09:11:28,821 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:28,822 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:28,822 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:28,822 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:28,824 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:28,824 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:28,828 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:11:28,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:28,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:28,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:28,853 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:28,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-10-28 09:11:28,855 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 [2021-10-28 09:11:28,864 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:11:28,864 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:11:28,864 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:11:28,864 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:11:28,875 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:11:28,876 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:11:28,905 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:11:29,016 INFO L443 ModelExtractionUtils]: Simplification made 23 calls to the SMT solver. [2021-10-28 09:11:29,017 INFO L444 ModelExtractionUtils]: 7 out of 28 variables were initially zero. Simplification set additionally 15 variables to zero. [2021-10-28 09:11:29,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:11:29,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:29,019 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:11:29,020 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:11:29,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-10-28 09:11:29,032 INFO L438 nArgumentSynthesizer]: Removed 1 redundant supporting invariants from a total of 2. [2021-10-28 09:11:29,032 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:11:29,046 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0, v_rep(select #length ULTIMATE.start_main_~#str1~0.base)_2) = -1*ULTIMATE.start_main_~j~0 + 6442450943*v_rep(select #length ULTIMATE.start_main_~#str1~0.base)_2 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] [2021-10-28 09:11:29,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:29,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Ended with exit code 0 [2021-10-28 09:11:29,160 INFO L297 tatePredicateManager]: 16 out of 17 supporting invariants were superfluous and have been removed [2021-10-28 09:11:29,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:29,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:11:29,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:11:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:29,494 WARN L261 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:11:29,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:11:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:11:29,549 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 [2021-10-28 09:11:29,549 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) [2021-10-28 09:11:29,849 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. [2021-10-28 09:11:29,851 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 [2021-10-28 09:11:29,852 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) [2021-10-28 09:11:29,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 16 transitions. [2021-10-28 09:11:29,852 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 16 transitions. Stem has 14 letters. Loop has 2 letters. [2021-10-28 09:11:29,853 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:11:29,853 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:11:29,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:29,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:11:29,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:11:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:30,172 WARN L261 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:11:30,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:11:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:11:30,225 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 [2021-10-28 09:11:30,225 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) [2021-10-28 09:11:30,553 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. [2021-10-28 09:11:30,554 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 [2021-10-28 09:11:30,555 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) [2021-10-28 09:11:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 17 transitions. [2021-10-28 09:11:30,555 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 17 transitions. Stem has 14 letters. Loop has 2 letters. [2021-10-28 09:11:30,556 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:11:30,556 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 17 transitions. Stem has 16 letters. Loop has 2 letters. [2021-10-28 09:11:30,556 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:11:30,556 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 17 transitions. Stem has 14 letters. Loop has 4 letters. [2021-10-28 09:11:30,557 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:11:30,557 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 29 transitions. [2021-10-28 09:11:30,558 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-28 09:11:30,558 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 22 states and 25 transitions. [2021-10-28 09:11:30,559 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2021-10-28 09:11:30,559 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-10-28 09:11:30,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 25 transitions. [2021-10-28 09:11:30,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:11:30,559 INFO L681 BuchiCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-10-28 09:11:30,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states and 25 transitions. [2021-10-28 09:11:30,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-28 09:11:30,561 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) [2021-10-28 09:11:30,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-10-28 09:11:30,562 INFO L704 BuchiCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-10-28 09:11:30,562 INFO L587 BuchiCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-10-28 09:11:30,562 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-28 09:11:30,562 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states and 25 transitions. [2021-10-28 09:11:30,563 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-28 09:11:30,563 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:11:30,563 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:11:30,564 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 1, 1, 1, 1, 1, 1] [2021-10-28 09:11:30,564 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 09:11:30,564 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 [2021-10-28 09:11:30,564 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 [2021-10-28 09:11:30,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:30,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1715425437, now seen corresponding path program 1 times [2021-10-28 09:11:30,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:30,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850971210] [2021-10-28 09:11:30,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:30,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 09:11:30,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:11:30,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850971210] [2021-10-28 09:11:30,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850971210] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:11:30,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:11:30,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:11:30,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180201753] [2021-10-28 09:11:30,640 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:11:30,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:30,641 INFO L85 PathProgramCache]: Analyzing trace with hash 2100362, now seen corresponding path program 1 times [2021-10-28 09:11:30,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:30,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831202467] [2021-10-28 09:11:30,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:30,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:30,649 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:11:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:30,657 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:11:30,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:11:30,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:11:30,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:11:30,801 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) [2021-10-28 09:11:30,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:11:30,846 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-10-28 09:11:30,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:11:30,847 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 25 transitions. [2021-10-28 09:11:30,847 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-28 09:11:30,848 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 23 states and 25 transitions. [2021-10-28 09:11:30,848 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2021-10-28 09:11:30,848 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-10-28 09:11:30,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 25 transitions. [2021-10-28 09:11:30,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:11:30,849 INFO L681 BuchiCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-10-28 09:11:30,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 25 transitions. [2021-10-28 09:11:30,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-10-28 09:11:30,851 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) [2021-10-28 09:11:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-10-28 09:11:30,851 INFO L704 BuchiCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-28 09:11:30,851 INFO L587 BuchiCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-28 09:11:30,851 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-28 09:11:30,851 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states and 24 transitions. [2021-10-28 09:11:30,852 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-28 09:11:30,852 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:11:30,852 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:11:30,854 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:11:30,854 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 09:11:30,854 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 [2021-10-28 09:11:30,854 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 [2021-10-28 09:11:30,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:30,855 INFO L85 PathProgramCache]: Analyzing trace with hash -743540257, now seen corresponding path program 1 times [2021-10-28 09:11:30,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:30,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331200886] [2021-10-28 09:11:30,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:30,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 09:11:31,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:11:31,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331200886] [2021-10-28 09:11:31,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331200886] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:31,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860032259] [2021-10-28 09:11:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:31,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:11:31,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:31,018 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:11:31,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-28 09:11:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:31,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:11:31,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:11:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 09:11:31,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860032259] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:31,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:11:31,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-28 09:11:31,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102300052] [2021-10-28 09:11:31,412 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:11:31,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:31,413 INFO L85 PathProgramCache]: Analyzing trace with hash 2100362, now seen corresponding path program 2 times [2021-10-28 09:11:31,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:31,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787808362] [2021-10-28 09:11:31,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:31,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:31,422 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:11:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:31,429 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:11:31,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:11:31,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:11:31,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:11:31,615 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) [2021-10-28 09:11:31,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:11:31,695 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-10-28 09:11:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:11:31,696 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 27 transitions. [2021-10-28 09:11:31,697 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-28 09:11:31,697 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 25 states and 27 transitions. [2021-10-28 09:11:31,697 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2021-10-28 09:11:31,698 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-10-28 09:11:31,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 27 transitions. [2021-10-28 09:11:31,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:11:31,698 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-10-28 09:11:31,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 27 transitions. [2021-10-28 09:11:31,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-10-28 09:11:31,700 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) [2021-10-28 09:11:31,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-10-28 09:11:31,701 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-10-28 09:11:31,701 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-10-28 09:11:31,701 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-10-28 09:11:31,701 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 26 transitions. [2021-10-28 09:11:31,702 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-28 09:11:31,702 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:11:31,702 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:11:31,703 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 09:11:31,703 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 09:11:31,703 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 [2021-10-28 09:11:31,703 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 [2021-10-28 09:11:31,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:31,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1577559391, now seen corresponding path program 2 times [2021-10-28 09:11:31,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:31,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646927702] [2021-10-28 09:11:31,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:31,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 09:11:31,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:11:31,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646927702] [2021-10-28 09:11:31,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646927702] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:31,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183493312] [2021-10-28 09:11:31,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:11:31,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:11:31,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:31,991 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:11:31,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-28 09:11:32,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:11:32,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:11:32,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:11:32,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:11:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 09:11:32,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183493312] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:32,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:11:32,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-10-28 09:11:32,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277283981] [2021-10-28 09:11:32,374 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:11:32,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:32,375 INFO L85 PathProgramCache]: Analyzing trace with hash 2100362, now seen corresponding path program 3 times [2021-10-28 09:11:32,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:32,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375950018] [2021-10-28 09:11:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:32,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:32,385 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:11:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:32,412 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:11:32,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:11:32,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:11:32,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:11:32,588 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) [2021-10-28 09:11:32,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:11:32,755 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-10-28 09:11:32,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:11:32,756 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 29 transitions. [2021-10-28 09:11:32,758 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-28 09:11:32,758 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 27 states and 29 transitions. [2021-10-28 09:11:32,758 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2021-10-28 09:11:32,758 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-10-28 09:11:32,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 29 transitions. [2021-10-28 09:11:32,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:11:32,759 INFO L681 BuchiCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-10-28 09:11:32,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 29 transitions. [2021-10-28 09:11:32,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-10-28 09:11:32,761 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) [2021-10-28 09:11:32,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-10-28 09:11:32,761 INFO L704 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-28 09:11:32,761 INFO L587 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-28 09:11:32,761 INFO L425 BuchiCegarLoop]: ======== Iteration 11============ [2021-10-28 09:11:32,762 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states and 28 transitions. [2021-10-28 09:11:32,762 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-28 09:11:32,762 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:11:32,762 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:11:32,763 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-28 09:11:32,763 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 09:11:32,763 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 [2021-10-28 09:11:32,764 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 [2021-10-28 09:11:32,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:32,764 INFO L85 PathProgramCache]: Analyzing trace with hash 88937187, now seen corresponding path program 3 times [2021-10-28 09:11:32,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:32,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151693550] [2021-10-28 09:11:32,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:32,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 09:11:33,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:11:33,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151693550] [2021-10-28 09:11:33,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151693550] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:33,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528367220] [2021-10-28 09:11:33,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:11:33,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:11:33,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:33,009 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:11:33,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-28 09:11:33,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 09:11:33,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:11:33,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 09:11:33,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:11:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 09:11:33,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528367220] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:33,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:11:33,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-10-28 09:11:33,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44699097] [2021-10-28 09:11:33,375 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:11:33,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:33,375 INFO L85 PathProgramCache]: Analyzing trace with hash 2100362, now seen corresponding path program 4 times [2021-10-28 09:11:33,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:33,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191429365] [2021-10-28 09:11:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:33,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:33,380 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:11:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:33,385 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:11:33,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:11:33,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:11:33,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:11:33,507 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) [2021-10-28 09:11:33,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:11:33,683 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-10-28 09:11:33,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:11:33,684 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 29 states and 31 transitions. [2021-10-28 09:11:33,684 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-28 09:11:33,685 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 29 states to 29 states and 31 transitions. [2021-10-28 09:11:33,685 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2021-10-28 09:11:33,685 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-10-28 09:11:33,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 31 transitions. [2021-10-28 09:11:33,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:11:33,686 INFO L681 BuchiCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-10-28 09:11:33,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states and 31 transitions. [2021-10-28 09:11:33,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-10-28 09:11:33,688 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) [2021-10-28 09:11:33,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-28 09:11:33,689 INFO L704 BuchiCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-28 09:11:33,689 INFO L587 BuchiCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-28 09:11:33,689 INFO L425 BuchiCegarLoop]: ======== Iteration 12============ [2021-10-28 09:11:33,690 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 30 transitions. [2021-10-28 09:11:33,690 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-28 09:11:33,690 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:11:33,690 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:11:33,691 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-28 09:11:33,692 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 09:11:33,692 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 [2021-10-28 09:11:33,692 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 [2021-10-28 09:11:33,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:33,693 INFO L85 PathProgramCache]: Analyzing trace with hash -430652763, now seen corresponding path program 4 times [2021-10-28 09:11:33,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:33,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145272312] [2021-10-28 09:11:33,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:33,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 09:11:33,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:11:33,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145272312] [2021-10-28 09:11:33,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145272312] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:33,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178477571] [2021-10-28 09:11:33,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:11:33,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:11:33,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:33,952 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:11:33,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-28 09:11:34,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:11:34,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:11:34,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 09:11:34,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:11:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 09:11:34,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178477571] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:34,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:11:34,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-28 09:11:34,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413356757] [2021-10-28 09:11:34,342 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:11:34,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:34,343 INFO L85 PathProgramCache]: Analyzing trace with hash 2100362, now seen corresponding path program 5 times [2021-10-28 09:11:34,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:34,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660003448] [2021-10-28 09:11:34,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:34,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:34,352 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:11:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:34,360 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:11:34,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:11:34,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 09:11:34,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:11:34,502 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) [2021-10-28 09:11:34,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:11:34,976 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-10-28 09:11:34,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:11:34,977 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 42 states and 44 transitions. [2021-10-28 09:11:34,978 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-28 09:11:34,979 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 42 states to 42 states and 44 transitions. [2021-10-28 09:11:34,979 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 22 [2021-10-28 09:11:34,979 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 22 [2021-10-28 09:11:34,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 44 transitions. [2021-10-28 09:11:34,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:11:34,980 INFO L681 BuchiCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-10-28 09:11:34,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 44 transitions. [2021-10-28 09:11:34,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2021-10-28 09:11:34,983 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) [2021-10-28 09:11:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-10-28 09:11:34,984 INFO L704 BuchiCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-10-28 09:11:34,984 INFO L587 BuchiCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-10-28 09:11:34,984 INFO L425 BuchiCegarLoop]: ======== Iteration 13============ [2021-10-28 09:11:34,984 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 30 states and 32 transitions. [2021-10-28 09:11:34,985 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-28 09:11:34,985 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:11:34,986 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:11:34,987 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-10-28 09:11:34,987 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 09:11:34,987 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 [2021-10-28 09:11:34,988 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 [2021-10-28 09:11:34,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:34,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1540388377, now seen corresponding path program 5 times [2021-10-28 09:11:34,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:34,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978651648] [2021-10-28 09:11:34,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:34,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:35,028 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:11:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:35,103 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:11:35,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:35,105 INFO L85 PathProgramCache]: Analyzing trace with hash 2100362, now seen corresponding path program 6 times [2021-10-28 09:11:35,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:35,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929097111] [2021-10-28 09:11:35,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:35,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:35,114 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:11:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:35,135 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:11:35,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:35,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1945357456, now seen corresponding path program 1 times [2021-10-28 09:11:35,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:35,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91276872] [2021-10-28 09:11:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:35,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:35,196 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:11:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:11:35,297 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:11:57,084 WARN L207 SmtUtils]: Spent 21.63 s on a formula simplification. DAG size of input: 312 DAG size of output: 237 [2021-10-28 09:12:12,588 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:12:12,588 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:12:12,588 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:12:12,588 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:12:12,589 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:12:12,589 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:12:12,589 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:12:12,589 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:12:12,589 INFO L133 ssoRankerPreferences]: Filename of dumped script: invert_string-3.c_Iteration13_Lasso [2021-10-28 09:12:12,589 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:12:12,589 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:12:12,590 WARN L313 ript$VariableManager]: TermVariabe aux_div_v_ULTIMATE.start_main_~i~0_123_62 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 09:12:12,590 WARN L313 ript$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. [2021-10-28 09:12:12,590 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. [2021-10-28 09:12:12,595 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:12:12,600 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:12:12,602 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:12:12,605 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:12:12,607 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:12:12,609 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:12:12,611 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:12:12,614 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:12:14,930 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) [2021-10-28 09:12:14,934 INFO L168 Benchmark]: Toolchain (without parser) took 62418.17 ms. Allocated memory was 81.8 MB in the beginning and 182.5 MB in the end (delta: 100.7 MB). Free memory was 59.5 MB in the beginning and 48.0 MB in the end (delta: 11.5 MB). Peak memory consumption was 119.6 MB. Max. memory is 16.1 GB. [2021-10-28 09:12:14,935 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 81.8 MB. Free memory was 59.0 MB in the beginning and 59.0 MB in the end (delta: 35.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:12:14,935 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.81 ms. Allocated memory was 81.8 MB in the beginning and 102.8 MB in the end (delta: 21.0 MB). Free memory was 59.4 MB in the beginning and 78.7 MB in the end (delta: -19.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:12:14,936 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.31 ms. Allocated memory is still 102.8 MB. Free memory was 78.5 MB in the beginning and 77.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:12:14,936 INFO L168 Benchmark]: Boogie Preprocessor took 30.42 ms. Allocated memory is still 102.8 MB. Free memory was 77.0 MB in the beginning and 75.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:12:14,936 INFO L168 Benchmark]: RCFGBuilder took 461.31 ms. Allocated memory is still 102.8 MB. Free memory was 75.7 MB in the beginning and 65.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:12:14,937 INFO L168 Benchmark]: BuchiAutomizer took 61593.85 ms. Allocated memory was 102.8 MB in the beginning and 182.5 MB in the end (delta: 79.7 MB). Free memory was 65.0 MB in the beginning and 48.0 MB in the end (delta: 17.1 MB). Peak memory consumption was 106.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:12:14,939 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 81.8 MB. Free memory was 59.0 MB in the beginning and 59.0 MB in the end (delta: 35.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 280.81 ms. Allocated memory was 81.8 MB in the beginning and 102.8 MB in the end (delta: 21.0 MB). Free memory was 59.4 MB in the beginning and 78.7 MB in the end (delta: -19.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.31 ms. Allocated memory is still 102.8 MB. Free memory was 78.5 MB in the beginning and 77.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.42 ms. Allocated memory is still 102.8 MB. Free memory was 77.0 MB in the beginning and 75.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 461.31 ms. Allocated memory is still 102.8 MB. Free memory was 75.7 MB in the beginning and 65.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 61593.85 ms. Allocated memory was 102.8 MB in the beginning and 182.5 MB in the end (delta: 79.7 MB). Free memory was 65.0 MB in the beginning and 48.0 MB in the end (delta: 17.1 MB). Peak memory consumption was 106.5 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. [2021-10-28 09:12:14,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-28 09:12:15,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-10-28 09:12:15,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-10-28 09:12:15,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-10-28 09:12:15,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-28 09:12:16,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-28 09:12:16,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-28 09:12:16,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-28 09:12:16,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac2adead-9bb2-431a-8a2e-1e491bc888a1/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...