./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-memory-alloca/Urban-2013WST-Fig2-alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-memory-alloca/Urban-2013WST-Fig2-alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 7e4d89645739beae47f9c52ff5003bd634bd856a7fdd28a03c9ca1afb29cead1 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:28:50,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:28:50,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:28:50,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:28:50,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:28:50,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:28:50,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:28:50,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:28:50,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:28:50,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:28:50,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:28:50,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:28:50,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:28:50,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:28:50,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:28:50,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:28:50,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:28:50,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:28:50,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:28:50,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:28:50,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:28:50,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:28:50,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:28:50,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:28:50,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:28:50,858 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:28:50,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:28:50,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:28:50,861 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:28:50,862 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:28:50,863 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:28:50,864 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:28:50,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:28:50,867 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:28:50,869 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:28:50,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:28:50,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:28:50,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:28:50,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:28:50,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:28:50,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:28:50,872 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-21 19:28:50,910 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:28:50,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:28:50,911 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:28:50,911 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:28:50,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:28:50,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:28:50,913 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:28:50,913 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-21 19:28:50,913 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-21 19:28:50,913 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-21 19:28:50,914 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-21 19:28:50,914 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-21 19:28:50,914 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-21 19:28:50,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:28:50,914 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:28:50,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:28:50,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:28:50,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-21 19:28:50,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-21 19:28:50,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-21 19:28:50,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:28:50,916 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-21 19:28:50,916 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:28:50,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-21 19:28:50,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:28:50,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:28:50,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:28:50,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:28:50,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:28:50,918 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-21 19:28:50,919 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_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e4d89645739beae47f9c52ff5003bd634bd856a7fdd28a03c9ca1afb29cead1 [2021-10-21 19:28:51,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:28:51,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:28:51,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:28:51,187 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:28:51,188 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:28:51,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/termination-memory-alloca/Urban-2013WST-Fig2-alloca.i [2021-10-21 19:28:51,265 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/data/d08001c25/8f02667f1c6a4a54b8243872c7b67460/FLAG48be2df79 [2021-10-21 19:28:51,799 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:28:51,804 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/sv-benchmarks/c/termination-memory-alloca/Urban-2013WST-Fig2-alloca.i [2021-10-21 19:28:51,825 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/data/d08001c25/8f02667f1c6a4a54b8243872c7b67460/FLAG48be2df79 [2021-10-21 19:28:52,089 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/data/d08001c25/8f02667f1c6a4a54b8243872c7b67460 [2021-10-21 19:28:52,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:28:52,099 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:28:52,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:28:52,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:28:52,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:28:52,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:28:52" (1/1) ... [2021-10-21 19:28:52,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f1cf26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:52, skipping insertion in model container [2021-10-21 19:28:52,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:28:52" (1/1) ... [2021-10-21 19:28:52,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:28:52,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:28:52,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:28:52,433 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:28:52,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:28:52,497 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:28:52,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:52 WrapperNode [2021-10-21 19:28:52,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:28:52,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:28:52,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:28:52,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:28:52,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:52" (1/1) ... [2021-10-21 19:28:52,537 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:52" (1/1) ... [2021-10-21 19:28:52,561 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:28:52,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:28:52,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:28:52,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:28:52,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:52" (1/1) ... [2021-10-21 19:28:52,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:52" (1/1) ... [2021-10-21 19:28:52,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:52" (1/1) ... [2021-10-21 19:28:52,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:52" (1/1) ... [2021-10-21 19:28:52,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:52" (1/1) ... [2021-10-21 19:28:52,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:52" (1/1) ... [2021-10-21 19:28:52,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:52" (1/1) ... [2021-10-21 19:28:52,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:28:52,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:28:52,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:28:52,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:28:52,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:52" (1/1) ... [2021-10-21 19:28:52,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:28:52,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:52,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:28:52,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-21 19:28:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:28:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:28:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:28:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:28:52,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:28:52,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:28:52,995 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:28:52,995 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-21 19:28:52,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:28:52 BoogieIcfgContainer [2021-10-21 19:28:52,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:28:52,998 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-21 19:28:52,998 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-21 19:28:53,006 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-21 19:28:53,007 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 19:28:53,007 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 21.10 07:28:52" (1/3) ... [2021-10-21 19:28:53,021 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@72dbd6bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.10 07:28:53, skipping insertion in model container [2021-10-21 19:28:53,021 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 19:28:53,021 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:52" (2/3) ... [2021-10-21 19:28:53,021 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@72dbd6bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.10 07:28:53, skipping insertion in model container [2021-10-21 19:28:53,022 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 19:28:53,022 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:28:52" (3/3) ... [2021-10-21 19:28:53,023 INFO L389 chiAutomizerObserver]: Analyzing ICFG Urban-2013WST-Fig2-alloca.i [2021-10-21 19:28:53,083 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-21 19:28:53,084 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-21 19:28:53,089 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-21 19:28:53,089 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-21 19:28:53,096 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-21 19:28:53,096 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-21 19:28:53,096 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-21 19:28:53,096 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-21 19:28:53,137 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:53,154 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-21 19:28:53,154 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:28:53,154 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:28:53,158 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 19:28:53,158 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-21 19:28:53,159 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-21 19:28:53,159 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:53,160 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-21 19:28:53,160 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:28:53,160 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:28:53,161 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 19:28:53,161 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-21 19:28:53,166 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 11#L-1true havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 7#L549-3true [2021-10-21 19:28:53,167 INFO L793 eck$LassoCheckResult]: Loop: 7#L549-3true call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 3#L549-1true assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 8#L551-3true assume !true; 12#L551-4true call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 7#L549-3true [2021-10-21 19:28:53,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:53,171 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-10-21 19:28:53,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:53,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631578182] [2021-10-21 19:28:53,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:53,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:53,263 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:28:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:53,295 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:28:53,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:53,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1144360, now seen corresponding path program 1 times [2021-10-21 19:28:53,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:53,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389039854] [2021-10-21 19:28:53,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:53,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:53,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:53,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389039854] [2021-10-21 19:28:53,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389039854] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:28:53,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:28:53,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:28:53,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644355746] [2021-10-21 19:28:53,357 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 19:28:53,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:53,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:28:53,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:28:53,375 INFO L87 Difference]: Start difference. First operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 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) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:53,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:53,380 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2021-10-21 19:28:53,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:28:53,382 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 12 transitions. [2021-10-21 19:28:53,383 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-21 19:28:53,386 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 7 states and 8 transitions. [2021-10-21 19:28:53,386 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-10-21 19:28:53,386 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-10-21 19:28:53,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2021-10-21 19:28:53,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:28:53,387 INFO L681 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-10-21 19:28:53,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2021-10-21 19:28:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-21 19:28:53,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:53,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2021-10-21 19:28:53,407 INFO L704 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-10-21 19:28:53,408 INFO L587 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-10-21 19:28:53,408 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-21 19:28:53,408 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 8 transitions. [2021-10-21 19:28:53,409 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-21 19:28:53,409 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:28:53,409 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:28:53,409 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 19:28:53,409 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2021-10-21 19:28:53,410 INFO L791 eck$LassoCheckResult]: Stem: 32#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 33#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 34#L549-3 [2021-10-21 19:28:53,410 INFO L793 eck$LassoCheckResult]: Loop: 34#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 30#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 31#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 35#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 36#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 34#L549-3 [2021-10-21 19:28:53,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:53,411 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2021-10-21 19:28:53,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:53,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631983736] [2021-10-21 19:28:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:53,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:53,425 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:28:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:53,438 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:28:53,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:53,439 INFO L82 PathProgramCache]: Analyzing trace with hash 35468273, now seen corresponding path program 1 times [2021-10-21 19:28:53,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:53,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678260734] [2021-10-21 19:28:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:53,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:53,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:53,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678260734] [2021-10-21 19:28:53,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678260734] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:28:53,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:28:53,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:28:53,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621474713] [2021-10-21 19:28:53,508 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 19:28:53,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:53,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:28:53,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:28:53,510 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. cyclomatic complexity: 2 Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:53,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:53,544 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2021-10-21 19:28:53,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:28:53,546 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2021-10-21 19:28:53,546 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-21 19:28:53,547 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 9 states and 10 transitions. [2021-10-21 19:28:53,547 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2021-10-21 19:28:53,547 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2021-10-21 19:28:53,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 10 transitions. [2021-10-21 19:28:53,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:28:53,548 INFO L681 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-21 19:28:53,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 10 transitions. [2021-10-21 19:28:53,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-21 19:28:53,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:53,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-21 19:28:53,550 INFO L704 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-21 19:28:53,550 INFO L587 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-21 19:28:53,550 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-21 19:28:53,550 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 10 transitions. [2021-10-21 19:28:53,551 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-21 19:28:53,551 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:28:53,551 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:28:53,551 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 19:28:53,552 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1] [2021-10-21 19:28:53,552 INFO L791 eck$LassoCheckResult]: Stem: 57#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 58#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 59#L549-3 [2021-10-21 19:28:53,552 INFO L793 eck$LassoCheckResult]: Loop: 59#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 55#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 56#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 60#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 61#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 63#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 62#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 59#L549-3 [2021-10-21 19:28:53,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:53,553 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 3 times [2021-10-21 19:28:53,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:53,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503464288] [2021-10-21 19:28:53,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:53,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:53,607 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:28:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:53,635 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:28:53,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:53,636 INFO L82 PathProgramCache]: Analyzing trace with hash -274676436, now seen corresponding path program 1 times [2021-10-21 19:28:53,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:53,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867028409] [2021-10-21 19:28:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:53,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:53,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:53,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:53,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867028409] [2021-10-21 19:28:53,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867028409] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:53,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230938632] [2021-10-21 19:28:53,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:53,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:53,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:53,723 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:53,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:28:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:53,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:28:53,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:53,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:28:53,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:53,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-21 19:28:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:53,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230938632] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:53,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:28:53,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-10-21 19:28:53,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166569513] [2021-10-21 19:28:53,940 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 19:28:53,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:53,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:28:53,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:28:53,942 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. cyclomatic complexity: 2 Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:53,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:53,996 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2021-10-21 19:28:53,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:28:53,996 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 12 transitions. [2021-10-21 19:28:53,998 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2021-10-21 19:28:53,999 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 12 transitions. [2021-10-21 19:28:54,000 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-10-21 19:28:54,000 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-10-21 19:28:54,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 12 transitions. [2021-10-21 19:28:54,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:28:54,001 INFO L681 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-21 19:28:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 12 transitions. [2021-10-21 19:28:54,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-21 19:28:54,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:54,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-21 19:28:54,004 INFO L704 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-21 19:28:54,004 INFO L587 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-21 19:28:54,004 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-21 19:28:54,005 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 12 transitions. [2021-10-21 19:28:54,006 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2021-10-21 19:28:54,006 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:28:54,006 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:28:54,008 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 19:28:54,008 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 1, 1, 1, 1] [2021-10-21 19:28:54,008 INFO L791 eck$LassoCheckResult]: Stem: 107#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 108#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 109#L549-3 [2021-10-21 19:28:54,009 INFO L793 eck$LassoCheckResult]: Loop: 109#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 105#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 106#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 110#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 111#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 115#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 114#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 113#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 112#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 109#L549-3 [2021-10-21 19:28:54,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:54,010 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 4 times [2021-10-21 19:28:54,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:54,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807246305] [2021-10-21 19:28:54,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:54,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:54,040 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:28:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:54,057 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:28:54,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:54,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1970998361, now seen corresponding path program 2 times [2021-10-21 19:28:54,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:54,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443792696] [2021-10-21 19:28:54,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:54,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:54,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:54,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443792696] [2021-10-21 19:28:54,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443792696] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:54,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630950189] [2021-10-21 19:28:54,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:28:54,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:54,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:54,204 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:54,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:28:54,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:28:54,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:54,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:28:54,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:54,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:28:54,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:54,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:54,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-21 19:28:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:54,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630950189] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:54,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:28:54,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-10-21 19:28:54,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626640248] [2021-10-21 19:28:54,413 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 19:28:54,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:54,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:28:54,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:28:54,416 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. cyclomatic complexity: 2 Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:54,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:54,497 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2021-10-21 19:28:54,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:28:54,497 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 14 transitions. [2021-10-21 19:28:54,500 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2021-10-21 19:28:54,503 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 14 transitions. [2021-10-21 19:28:54,503 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2021-10-21 19:28:54,503 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2021-10-21 19:28:54,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 14 transitions. [2021-10-21 19:28:54,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:28:54,504 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-21 19:28:54,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 14 transitions. [2021-10-21 19:28:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-21 19:28:54,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:54,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-21 19:28:54,507 INFO L704 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-21 19:28:54,507 INFO L587 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-21 19:28:54,507 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-21 19:28:54,508 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 14 transitions. [2021-10-21 19:28:54,509 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2021-10-21 19:28:54,510 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:28:54,510 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:28:54,510 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 19:28:54,511 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 1, 1, 1, 1] [2021-10-21 19:28:54,511 INFO L791 eck$LassoCheckResult]: Stem: 172#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 173#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 174#L549-3 [2021-10-21 19:28:54,511 INFO L793 eck$LassoCheckResult]: Loop: 174#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 170#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 171#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 175#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 176#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 177#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 182#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 181#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 180#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 179#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 178#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 174#L549-3 [2021-10-21 19:28:54,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:54,512 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 5 times [2021-10-21 19:28:54,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:54,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71571086] [2021-10-21 19:28:54,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:54,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:54,541 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:28:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:54,550 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:28:54,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:54,551 INFO L82 PathProgramCache]: Analyzing trace with hash -48795806, now seen corresponding path program 3 times [2021-10-21 19:28:54,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:54,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650541588] [2021-10-21 19:28:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:54,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:54,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:54,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650541588] [2021-10-21 19:28:54,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650541588] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:54,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645310631] [2021-10-21 19:28:54,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:28:54,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:54,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:54,681 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:54,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:28:54,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 19:28:54,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:54,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:28:54,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:54,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:28:54,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:54,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:54,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:54,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-21 19:28:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:54,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645310631] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:54,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:28:54,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2021-10-21 19:28:54,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922580096] [2021-10-21 19:28:54,903 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 19:28:54,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:54,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:28:54,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:28:54,907 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. cyclomatic complexity: 2 Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:55,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:55,001 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-10-21 19:28:55,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:28:55,001 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 16 transitions. [2021-10-21 19:28:55,003 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 13 [2021-10-21 19:28:55,005 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 15 states and 16 transitions. [2021-10-21 19:28:55,005 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2021-10-21 19:28:55,005 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2021-10-21 19:28:55,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 16 transitions. [2021-10-21 19:28:55,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:28:55,006 INFO L681 BuchiCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-21 19:28:55,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 16 transitions. [2021-10-21 19:28:55,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-21 19:28:55,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:55,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-21 19:28:55,009 INFO L704 BuchiCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-21 19:28:55,009 INFO L587 BuchiCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-21 19:28:55,009 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-21 19:28:55,010 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 16 transitions. [2021-10-21 19:28:55,011 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 13 [2021-10-21 19:28:55,011 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:28:55,011 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:28:55,012 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 19:28:55,012 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [5, 4, 1, 1, 1, 1] [2021-10-21 19:28:55,012 INFO L791 eck$LassoCheckResult]: Stem: 252#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 253#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 254#L549-3 [2021-10-21 19:28:55,013 INFO L793 eck$LassoCheckResult]: Loop: 254#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 250#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 251#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 257#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 255#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 256#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 264#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 263#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 262#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 261#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 260#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 259#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 258#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 254#L549-3 [2021-10-21 19:28:55,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:55,013 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 6 times [2021-10-21 19:28:55,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:55,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318668831] [2021-10-21 19:28:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:55,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:55,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:55,041 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:28:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:55,058 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:28:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:55,063 INFO L82 PathProgramCache]: Analyzing trace with hash 351922269, now seen corresponding path program 4 times [2021-10-21 19:28:55,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:55,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739023599] [2021-10-21 19:28:55,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:55,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:55,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:55,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739023599] [2021-10-21 19:28:55,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739023599] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:55,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305305600] [2021-10-21 19:28:55,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:28:55,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:55,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:55,197 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:55,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:28:55,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:28:55,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:55,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:28:55,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:55,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:28:55,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:55,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:55,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:55,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:55,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-21 19:28:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:55,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305305600] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:55,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:28:55,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2021-10-21 19:28:55,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069779966] [2021-10-21 19:28:55,410 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 19:28:55,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:55,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:28:55,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:28:55,413 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. cyclomatic complexity: 2 Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:55,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:55,523 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-10-21 19:28:55,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:28:55,524 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17 states and 18 transitions. [2021-10-21 19:28:55,527 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 15 [2021-10-21 19:28:55,528 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17 states to 17 states and 18 transitions. [2021-10-21 19:28:55,528 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-10-21 19:28:55,529 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2021-10-21 19:28:55,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 18 transitions. [2021-10-21 19:28:55,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:28:55,530 INFO L681 BuchiCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-21 19:28:55,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 18 transitions. [2021-10-21 19:28:55,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-21 19:28:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-10-21 19:28:55,533 INFO L704 BuchiCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-21 19:28:55,533 INFO L587 BuchiCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-21 19:28:55,533 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-21 19:28:55,533 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 18 transitions. [2021-10-21 19:28:55,533 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 15 [2021-10-21 19:28:55,533 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:28:55,534 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:28:55,534 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 19:28:55,534 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 1, 1, 1, 1] [2021-10-21 19:28:55,534 INFO L791 eck$LassoCheckResult]: Stem: 347#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 348#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 349#L549-3 [2021-10-21 19:28:55,535 INFO L793 eck$LassoCheckResult]: Loop: 349#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 345#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 346#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 352#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 350#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 351#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 361#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 360#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 359#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 358#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 357#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 356#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 355#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 354#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 353#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 349#L549-3 [2021-10-21 19:28:55,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:55,535 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 7 times [2021-10-21 19:28:55,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:55,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701247352] [2021-10-21 19:28:55,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:55,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:55,552 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:28:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:55,562 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:28:55,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:55,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1105064296, now seen corresponding path program 5 times [2021-10-21 19:28:55,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:55,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643714658] [2021-10-21 19:28:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:55,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:55,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:55,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:55,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643714658] [2021-10-21 19:28:55,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643714658] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:55,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483313650] [2021-10-21 19:28:55,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:28:55,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:55,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:55,769 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:55,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:28:55,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-21 19:28:55,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:55,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:28:55,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:55,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:28:55,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:55,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:55,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:55,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:55,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:56,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-21 19:28:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:56,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483313650] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:56,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:28:56,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 19 [2021-10-21 19:28:56,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634974926] [2021-10-21 19:28:56,032 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 19:28:56,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:56,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:28:56,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:28:56,033 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. cyclomatic complexity: 2 Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:56,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:56,183 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-10-21 19:28:56,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:28:56,184 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 20 transitions. [2021-10-21 19:28:56,184 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 17 [2021-10-21 19:28:56,185 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 19 states and 20 transitions. [2021-10-21 19:28:56,185 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2021-10-21 19:28:56,185 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2021-10-21 19:28:56,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 20 transitions. [2021-10-21 19:28:56,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:28:56,185 INFO L681 BuchiCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-10-21 19:28:56,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 20 transitions. [2021-10-21 19:28:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-21 19:28:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:56,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-10-21 19:28:56,187 INFO L704 BuchiCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-10-21 19:28:56,187 INFO L587 BuchiCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-10-21 19:28:56,187 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-21 19:28:56,187 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 20 transitions. [2021-10-21 19:28:56,188 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 17 [2021-10-21 19:28:56,188 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:28:56,188 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:28:56,189 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 19:28:56,189 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [7, 6, 1, 1, 1, 1] [2021-10-21 19:28:56,189 INFO L791 eck$LassoCheckResult]: Stem: 457#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 458#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 459#L549-3 [2021-10-21 19:28:56,189 INFO L793 eck$LassoCheckResult]: Loop: 459#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 455#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 456#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 462#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 460#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 461#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 473#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 472#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 471#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 470#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 469#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 468#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 467#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 466#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 465#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 464#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 463#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 459#L549-3 [2021-10-21 19:28:56,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:56,189 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 8 times [2021-10-21 19:28:56,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:56,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300756397] [2021-10-21 19:28:56,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:56,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:56,195 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:28:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:56,199 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:28:56,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:56,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1109814765, now seen corresponding path program 6 times [2021-10-21 19:28:56,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:56,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020788695] [2021-10-21 19:28:56,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:56,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:56,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:56,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020788695] [2021-10-21 19:28:56,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020788695] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:56,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719255195] [2021-10-21 19:28:56,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:28:56,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:56,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:56,396 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:56,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:28:56,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-21 19:28:56,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:56,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:28:56,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:56,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:28:56,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:56,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:56,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:56,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:56,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:56,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:56,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-21 19:28:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:56,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719255195] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:56,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:28:56,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 22 [2021-10-21 19:28:56,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964885402] [2021-10-21 19:28:56,653 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 19:28:56,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:56,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-21 19:28:56,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:28:56,655 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. cyclomatic complexity: 2 Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:56,818 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-10-21 19:28:56,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:28:56,819 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 22 transitions. [2021-10-21 19:28:56,820 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 19 [2021-10-21 19:28:56,821 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 21 states and 22 transitions. [2021-10-21 19:28:56,821 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2021-10-21 19:28:56,821 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2021-10-21 19:28:56,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 22 transitions. [2021-10-21 19:28:56,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:28:56,822 INFO L681 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-21 19:28:56,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states and 22 transitions. [2021-10-21 19:28:56,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-21 19:28:56,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:56,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-10-21 19:28:56,826 INFO L704 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-21 19:28:56,827 INFO L587 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-21 19:28:56,827 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-21 19:28:56,827 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 22 transitions. [2021-10-21 19:28:56,827 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 19 [2021-10-21 19:28:56,827 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:28:56,827 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:28:56,828 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 19:28:56,828 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [8, 7, 1, 1, 1, 1] [2021-10-21 19:28:56,829 INFO L791 eck$LassoCheckResult]: Stem: 582#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 583#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 584#L549-3 [2021-10-21 19:28:56,829 INFO L793 eck$LassoCheckResult]: Loop: 584#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 580#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 581#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 585#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 586#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 587#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 600#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 599#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 598#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 597#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 596#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 595#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 594#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 593#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 592#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 591#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 590#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 589#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 588#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 584#L549-3 [2021-10-21 19:28:56,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:56,829 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 9 times [2021-10-21 19:28:56,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:56,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114977171] [2021-10-21 19:28:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:56,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:56,839 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:28:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:56,851 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:28:56,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:56,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1380048178, now seen corresponding path program 7 times [2021-10-21 19:28:56,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:56,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644074941] [2021-10-21 19:28:56,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:56,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:57,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:57,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644074941] [2021-10-21 19:28:57,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644074941] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:57,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968832814] [2021-10-21 19:28:57,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:28:57,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:57,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:57,100 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:57,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:28:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:57,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:28:57,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:57,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:28:57,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:57,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:57,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:57,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:57,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:57,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:57,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:57,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-21 19:28:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:57,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968832814] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:57,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:28:57,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 25 [2021-10-21 19:28:57,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876207781] [2021-10-21 19:28:57,382 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 19:28:57,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:57,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-21 19:28:57,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:28:57,386 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. cyclomatic complexity: 2 Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:57,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:57,566 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-10-21 19:28:57,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:28:57,567 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 24 transitions. [2021-10-21 19:28:57,567 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2021-10-21 19:28:57,568 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 23 states and 24 transitions. [2021-10-21 19:28:57,568 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2021-10-21 19:28:57,568 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2021-10-21 19:28:57,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 24 transitions. [2021-10-21 19:28:57,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:28:57,568 INFO L681 BuchiCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-10-21 19:28:57,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 24 transitions. [2021-10-21 19:28:57,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-21 19:28:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-10-21 19:28:57,570 INFO L704 BuchiCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-10-21 19:28:57,570 INFO L587 BuchiCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-10-21 19:28:57,570 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-10-21 19:28:57,571 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 24 transitions. [2021-10-21 19:28:57,571 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2021-10-21 19:28:57,571 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:28:57,571 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:28:57,572 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 19:28:57,572 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [9, 8, 1, 1, 1, 1] [2021-10-21 19:28:57,572 INFO L791 eck$LassoCheckResult]: Stem: 722#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 723#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 724#L549-3 [2021-10-21 19:28:57,572 INFO L793 eck$LassoCheckResult]: Loop: 724#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 720#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 721#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 725#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 726#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 727#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 742#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 741#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 740#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 739#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 738#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 737#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 736#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 735#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 734#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 733#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 732#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 731#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 730#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 729#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 728#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 724#L549-3 [2021-10-21 19:28:57,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:57,573 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 10 times [2021-10-21 19:28:57,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:57,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664912631] [2021-10-21 19:28:57,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:57,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:57,578 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:28:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:57,582 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:28:57,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:57,583 INFO L82 PathProgramCache]: Analyzing trace with hash 918646985, now seen corresponding path program 8 times [2021-10-21 19:28:57,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:57,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461540015] [2021-10-21 19:28:57,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:57,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:57,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:57,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461540015] [2021-10-21 19:28:57,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461540015] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:57,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49008402] [2021-10-21 19:28:57,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:28:57,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:57,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:57,804 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:57,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:28:57,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:28:57,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:57,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:28:57,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:57,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:28:57,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:57,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:57,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:57,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:58,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:58,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:58,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:58,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:28:58,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-21 19:28:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:58,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49008402] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:58,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:28:58,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 28 [2021-10-21 19:28:58,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763001320] [2021-10-21 19:28:58,139 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 19:28:58,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:58,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-21 19:28:58,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:28:58,140 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. cyclomatic complexity: 2 Second operand has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:58,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:58,384 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-10-21 19:28:58,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:28:58,384 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 26 transitions. [2021-10-21 19:28:58,385 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-10-21 19:28:58,385 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 25 states and 26 transitions. [2021-10-21 19:28:58,385 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2021-10-21 19:28:58,385 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2021-10-21 19:28:58,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 26 transitions. [2021-10-21 19:28:58,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:28:58,386 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-10-21 19:28:58,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 26 transitions. [2021-10-21 19:28:58,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-21 19:28:58,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 25 states have (on average 1.04) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:58,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-10-21 19:28:58,388 INFO L704 BuchiCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-10-21 19:28:58,388 INFO L587 BuchiCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-10-21 19:28:58,388 INFO L425 BuchiCegarLoop]: ======== Iteration 11============ [2021-10-21 19:28:58,388 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 26 transitions. [2021-10-21 19:28:58,388 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-10-21 19:28:58,388 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:28:58,388 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:28:58,389 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 19:28:58,389 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [10, 9, 1, 1, 1, 1] [2021-10-21 19:28:58,389 INFO L791 eck$LassoCheckResult]: Stem: 877#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 878#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 879#L549-3 [2021-10-21 19:28:58,389 INFO L793 eck$LassoCheckResult]: Loop: 879#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 875#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 876#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 882#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 880#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 881#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 899#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 898#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 897#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 896#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 895#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 894#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 893#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 892#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 891#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 890#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 889#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 888#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 887#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 886#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 885#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 884#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 883#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 879#L549-3 [2021-10-21 19:28:58,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:58,390 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 11 times [2021-10-21 19:28:58,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:58,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216580825] [2021-10-21 19:28:58,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:58,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:58,396 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:28:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:58,403 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:28:58,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:58,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1943458812, now seen corresponding path program 9 times [2021-10-21 19:28:58,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:58,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143034186] [2021-10-21 19:28:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:58,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:58,432 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:28:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:58,474 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:28:58,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:58,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1979445758, now seen corresponding path program 1 times [2021-10-21 19:28:58,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:58,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101002140] [2021-10-21 19:28:58,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:58,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:58,509 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:28:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:28:58,547 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:29:02,299 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:29:02,300 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:29:02,300 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:29:02,300 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:29:02,300 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 19:29:02,300 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:29:02,301 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:29:02,301 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:29:02,301 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-2013WST-Fig2-alloca.i_Iteration11_Lasso [2021-10-21 19:29:02,301 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:29:02,301 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:29:02,320 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:29:02,324 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:29:02,326 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:29:02,496 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:29:02,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:29:02,499 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:29:02,501 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:29:02,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:29:02,505 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:29:02,507 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:29:02,509 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:29:02,752 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:29:02,755 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 19:29:02,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:29:02,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:02,758 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:29:02,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-21 19:29:02,760 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:29:02,767 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:29:02,767 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:29:02,767 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:29:02,767 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:29:02,767 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:29:02,770 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:29:02,770 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:29:02,794 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:29:02,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:02,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:29:02,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:02,837 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:29:02,844 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:29:02,852 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:29:02,853 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:29:02,853 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:29:02,853 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:29:02,853 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:29:02,854 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:29:02,854 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:29:02,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-21 19:29:02,860 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:29:02,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:02,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:29:02,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:02,885 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:29:02,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-21 19:29:02,887 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:29:02,894 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:29:02,895 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:29:02,895 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:29:02,895 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:29:02,900 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:29:02,901 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:29:02,922 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:29:02,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Ended with exit code 0 [2021-10-21 19:29:02,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:29:02,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:02,944 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:29:02,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-21 19:29:02,947 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:29:02,954 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:29:02,954 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:29:02,954 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:29:02,954 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:29:02,961 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:29:02,961 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:29:02,965 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:29:02,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:02,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:29:02,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:02,996 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:29:03,000 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:29:03,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-21 19:29:03,008 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:29:03,008 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:29:03,008 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:29:03,008 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:29:03,010 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:29:03,010 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:29:03,030 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:29:03,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2021-10-21 19:29:03,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:29:03,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:03,054 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:29:03,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-21 19:29:03,059 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:29:03,066 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:29:03,066 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:29:03,066 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:29:03,066 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:29:03,077 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:29:03,078 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:29:03,100 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:29:03,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:03,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:29:03,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:03,140 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:29:03,146 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:29:03,155 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:29:03,155 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:29:03,156 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:29:03,156 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:29:03,156 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:29:03,157 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:29:03,157 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:29:03,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-21 19:29:03,172 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:29:03,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:03,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:29:03,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:03,214 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:29:03,220 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:29:03,229 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:29:03,229 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:29:03,229 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:29:03,229 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:29:03,229 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:29:03,230 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:29:03,230 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:29:03,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-21 19:29:03,245 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 19:29:03,264 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-21 19:29:03,264 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-21 19:29:03,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:29:03,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:03,267 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:29:03,272 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 19:29:03,273 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 19:29:03,273 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 19:29:03,273 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(v_rep(select (select #memory_int ULTIMATE.start_main_~x1~0.base) ULTIMATE.start_main_~x1~0.offset)_1) = -2*v_rep(select (select #memory_int ULTIMATE.start_main_~x1~0.base) ULTIMATE.start_main_~x1~0.offset)_1 + 21 Supporting invariants [] [2021-10-21 19:29:03,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-21 19:29:03,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:03,361 INFO L297 tatePredicateManager]: 9 out of 11 supporting invariants were superfluous and have been removed [2021-10-21 19:29:03,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:29:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:03,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:29:03,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:29:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:03,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 19:29:03,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:29:03,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2021-10-21 19:29:03,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:03,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-10-21 19:29:03,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-10-21 19:29:03,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-10-21 19:29:03,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-10-21 19:29:03,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-10-21 19:29:03,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-10-21 19:29:04,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-10-21 19:29:04,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-10-21 19:29:04,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-10-21 19:29:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:29:04,308 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 12 loop predicates [2021-10-21 19:29:04,308 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 26 transitions. cyclomatic complexity: 2 Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:29:04,658 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 26 transitions. cyclomatic complexity: 2. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 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) Result 57 states and 62 transitions. Complement of second has 26 states. [2021-10-21 19:29:04,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 1 stem states 12 non-accepting loop states 1 accepting loop states [2021-10-21 19:29:04,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:29:04,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 31 transitions. [2021-10-21 19:29:04,661 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 31 transitions. Stem has 2 letters. Loop has 23 letters. [2021-10-21 19:29:04,662 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:29:04,663 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 31 transitions. Stem has 25 letters. Loop has 23 letters. [2021-10-21 19:29:04,663 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:29:04,663 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 31 transitions. Stem has 2 letters. Loop has 46 letters. [2021-10-21 19:29:04,664 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:29:04,664 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 57 states and 62 transitions. [2021-10-21 19:29:04,665 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 25 [2021-10-21 19:29:04,666 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 57 states to 56 states and 61 transitions. [2021-10-21 19:29:04,667 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 28 [2021-10-21 19:29:04,667 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 29 [2021-10-21 19:29:04,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 61 transitions. [2021-10-21 19:29:04,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:29:04,667 INFO L681 BuchiCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-10-21 19:29:04,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states and 61 transitions. [2021-10-21 19:29:04,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-10-21 19:29:04,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 54 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:29:04,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2021-10-21 19:29:04,672 INFO L704 BuchiCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-10-21 19:29:04,672 INFO L587 BuchiCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-10-21 19:29:04,672 INFO L425 BuchiCegarLoop]: ======== Iteration 12============ [2021-10-21 19:29:04,673 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 55 states and 60 transitions. [2021-10-21 19:29:04,673 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 25 [2021-10-21 19:29:04,673 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:29:04,674 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:29:04,674 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-21 19:29:04,674 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [11, 10, 1, 1, 1, 1] [2021-10-21 19:29:04,675 INFO L791 eck$LassoCheckResult]: Stem: 1148#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 1149#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 1158#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 1144#L549-1 [2021-10-21 19:29:04,675 INFO L793 eck$LassoCheckResult]: Loop: 1144#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 1145#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1156#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1152#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1153#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1178#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1177#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1176#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1175#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1174#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1173#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1172#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1171#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1170#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1169#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1168#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1167#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1166#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1165#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1164#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1163#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1162#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1161#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 1159#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 1150#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 1144#L549-1 [2021-10-21 19:29:04,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:29:04,675 INFO L82 PathProgramCache]: Analyzing trace with hash 29860, now seen corresponding path program 1 times [2021-10-21 19:29:04,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:29:04,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330766030] [2021-10-21 19:29:04,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:29:04,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:29:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:29:04,691 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:29:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:29:04,700 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:29:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:29:04,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1726515181, now seen corresponding path program 10 times [2021-10-21 19:29:04,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:29:04,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295818510] [2021-10-21 19:29:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:29:04,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:29:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:29:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 84 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:29:05,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:29:05,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295818510] [2021-10-21 19:29:05,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295818510] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:05,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670871710] [2021-10-21 19:29:05,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:29:05,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:29:05,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:29:05,055 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:29:05,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:29:05,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:29:05,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:29:05,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:29:05,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:29:05,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:29:05,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:29:05,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:29:05,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:29:05,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:29:05,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:29:05,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:29:05,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:29:05,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:29:05,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-21 19:29:05,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-21 19:29:05,573 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:29:05,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670871710] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:29:05,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:29:05,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 30 [2021-10-21 19:29:05,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144038550] [2021-10-21 19:29:05,575 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 19:29:05,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:29:05,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-21 19:29:05,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2021-10-21 19:29:05,579 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. cyclomatic complexity: 7 Second operand has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 30 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:29:05,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:29:05,892 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-10-21 19:29:05,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 19:29:05,893 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 50 transitions. [2021-10-21 19:29:05,894 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-21 19:29:05,894 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 0 states and 0 transitions. [2021-10-21 19:29:05,894 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-21 19:29:05,894 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-21 19:29:05,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-21 19:29:05,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:29:05,894 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:29:05,894 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:29:05,894 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:29:05,894 INFO L425 BuchiCegarLoop]: ======== Iteration 13============ [2021-10-21 19:29:05,894 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:29:05,894 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-21 19:29:05,894 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-21 19:29:05,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 21.10 07:29:05 BoogieIcfgContainer [2021-10-21 19:29:05,900 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-21 19:29:05,901 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:29:05,901 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:29:05,901 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:29:05,902 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:28:52" (3/4) ... [2021-10-21 19:29:05,905 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 19:29:05,905 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:29:05,907 INFO L168 Benchmark]: Toolchain (without parser) took 13807.09 ms. Allocated memory was 81.8 MB in the beginning and 151.0 MB in the end (delta: 69.2 MB). Free memory was 46.7 MB in the beginning and 71.3 MB in the end (delta: -24.6 MB). Peak memory consumption was 44.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:29:05,907 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 81.8 MB. Free memory was 54.2 MB in the beginning and 54.2 MB in the end (delta: 27.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:29:05,908 INFO L168 Benchmark]: CACSL2BoogieTranslator took 393.69 ms. Allocated memory was 81.8 MB in the beginning and 104.9 MB in the end (delta: 23.1 MB). Free memory was 46.4 MB in the beginning and 75.4 MB in the end (delta: -28.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:29:05,908 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.06 ms. Allocated memory is still 104.9 MB. Free memory was 75.4 MB in the beginning and 73.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:29:05,908 INFO L168 Benchmark]: Boogie Preprocessor took 45.07 ms. Allocated memory is still 104.9 MB. Free memory was 73.8 MB in the beginning and 72.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:29:05,909 INFO L168 Benchmark]: RCFGBuilder took 384.39 ms. Allocated memory is still 104.9 MB. Free memory was 72.7 MB in the beginning and 63.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:29:05,909 INFO L168 Benchmark]: BuchiAutomizer took 12902.22 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 63.3 MB in the beginning and 71.3 MB in the end (delta: -8.1 MB). Peak memory consumption was 38.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:29:05,909 INFO L168 Benchmark]: Witness Printer took 4.61 ms. Allocated memory is still 151.0 MB. Free memory is still 71.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:29:05,911 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 81.8 MB. Free memory was 54.2 MB in the beginning and 54.2 MB in the end (delta: 27.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 393.69 ms. Allocated memory was 81.8 MB in the beginning and 104.9 MB in the end (delta: 23.1 MB). Free memory was 46.4 MB in the beginning and 75.4 MB in the end (delta: -28.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.06 ms. Allocated memory is still 104.9 MB. Free memory was 75.4 MB in the beginning and 73.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.07 ms. Allocated memory is still 104.9 MB. Free memory was 73.8 MB in the beginning and 72.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 384.39 ms. Allocated memory is still 104.9 MB. Free memory was 72.7 MB in the beginning and 63.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 12902.22 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 63.3 MB in the beginning and 71.3 MB in the end (delta: -8.1 MB). Peak memory consumption was 38.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.61 ms. Allocated memory is still 151.0 MB. Free memory is still 71.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (11 trivial, 1 deterministic, 0 nondeterministic). One deterministic module has affine ranking function 21 + -2 * unknown-#memory_int-unknown[x1][x1] and consists of 14 locations. 11 modules have a trivial ranking function, the largest among these consists of 31 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 12.8s and 13 iterations. TraceHistogramMax:11. Analysis of lassos took 9.8s. Construction of modules took 0.8s. Büchi inclusion checks took 1.9s. Highest rank in rank-based complementation 3. Minimization of det autom 11. Minimization of nondet autom 1. Automata minimization 38.1ms AutomataMinimizationTime, 11 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 55 states and ocurred in iteration 11. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/90 HoareTripleCheckerStatistics: 73 SDtfs, 115 SDslu, 123 SDs, 0 SdLazy, 1381 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 863.0ms Time LassoAnalysisResults: nont0 unkn0 SFLI11 SFLT0 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital153 mio100 ax111 hnf100 lsp85 ukn72 mio100 lsp44 div100 bol100 ite100 ukn100 eq191 hnf88 smp100 dnf100 smp100 tf100 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 37ms VariablesStem: 2 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-21 19:29:05,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:06,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-21 19:29:06,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:06,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:06,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-21 19:29:06,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:07,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:07,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:07,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:29:07,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e6f4aa-9d3d-4acb-814b-60aa92848528/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...