./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 22:49:51,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 22:49:51,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 22:49:51,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 22:49:51,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 22:49:51,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 22:49:51,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 22:49:51,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 22:49:51,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 22:49:51,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 22:49:51,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 22:49:51,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 22:49:51,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 22:49:51,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 22:49:51,730 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 22:49:51,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 22:49:51,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 22:49:51,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 22:49:51,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 22:49:51,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 22:49:51,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 22:49:51,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 22:49:51,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 22:49:51,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 22:49:51,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 22:49:51,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 22:49:51,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 22:49:51,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 22:49:51,757 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 22:49:51,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 22:49:51,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 22:49:51,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 22:49:51,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 22:49:51,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 22:49:51,765 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 22:49:51,765 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 22:49:51,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 22:49:51,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 22:49:51,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 22:49:51,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 22:49:51,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 22:49:51,772 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 22:49:51,802 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 22:49:51,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 22:49:51,803 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 22:49:51,803 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 22:49:51,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 22:49:51,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 22:49:51,806 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 22:49:51,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 22:49:51,806 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 22:49:51,807 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 22:49:51,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 22:49:51,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 22:49:51,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 22:49:51,808 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 22:49:51,809 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 22:49:51,809 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 22:49:51,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 22:49:51,809 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 22:49:51,810 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 22:49:51,810 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 22:49:51,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 22:49:51,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 22:49:51,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 22:49:51,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:49:51,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 22:49:51,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 22:49:51,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 22:49:51,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 22:49:51,812 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 22:49:51,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d [2021-10-28 22:49:52,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 22:49:52,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 22:49:52,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 22:49:52,139 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 22:49:52,141 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 22:49:52,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2021-10-28 22:49:52,243 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/data/b13af2fe0/8d7d7d7c930146719f75c44aedb2b660/FLAGfd1517dea [2021-10-28 22:49:52,910 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 22:49:52,911 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2021-10-28 22:49:52,929 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/data/b13af2fe0/8d7d7d7c930146719f75c44aedb2b660/FLAGfd1517dea [2021-10-28 22:49:53,207 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/data/b13af2fe0/8d7d7d7c930146719f75c44aedb2b660 [2021-10-28 22:49:53,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 22:49:53,216 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 22:49:53,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 22:49:53,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 22:49:53,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 22:49:53,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:49:53" (1/1) ... [2021-10-28 22:49:53,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c319da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:53, skipping insertion in model container [2021-10-28 22:49:53,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:49:53" (1/1) ... [2021-10-28 22:49:53,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 22:49:53,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 22:49:53,645 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i[22605,22618] [2021-10-28 22:49:53,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:49:53,663 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 22:49:53,735 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i[22605,22618] [2021-10-28 22:49:53,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:49:53,789 INFO L208 MainTranslator]: Completed translation [2021-10-28 22:49:53,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:53 WrapperNode [2021-10-28 22:49:53,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 22:49:53,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 22:49:53,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 22:49:53,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 22:49:53,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:53" (1/1) ... [2021-10-28 22:49:53,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:53" (1/1) ... [2021-10-28 22:49:53,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:53" (1/1) ... [2021-10-28 22:49:53,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:53" (1/1) ... [2021-10-28 22:49:53,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:53" (1/1) ... [2021-10-28 22:49:53,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:53" (1/1) ... [2021-10-28 22:49:53,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:53" (1/1) ... [2021-10-28 22:49:53,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 22:49:53,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 22:49:53,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 22:49:53,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 22:49:53,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:53" (1/1) ... [2021-10-28 22:49:53,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:49:53,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:49:53,976 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 22:49:54,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 22:49:54,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 22:49:54,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 22:49:54,034 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 22:49:54,034 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 22:49:54,034 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 22:49:54,036 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 22:49:54,036 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 22:49:54,036 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 22:49:54,037 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 22:49:54,038 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 22:49:54,038 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 22:49:54,038 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 22:49:54,038 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 22:49:54,039 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 22:49:54,039 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 22:49:54,039 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 22:49:54,039 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 22:49:54,039 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 22:49:54,040 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 22:49:54,040 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 22:49:54,040 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 22:49:54,040 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 22:49:54,040 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 22:49:54,041 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 22:49:54,041 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 22:49:54,041 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 22:49:54,041 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 22:49:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 22:49:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 22:49:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 22:49:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 22:49:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 22:49:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 22:49:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 22:49:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 22:49:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 22:49:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 22:49:54,044 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 22:49:54,044 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 22:49:54,044 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 22:49:54,044 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 22:49:54,044 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 22:49:54,045 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 22:49:54,045 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 22:49:54,045 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 22:49:54,045 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 22:49:54,045 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 22:49:54,046 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 22:49:54,046 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 22:49:54,047 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 22:49:54,047 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 22:49:54,048 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 22:49:54,048 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 22:49:54,048 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 22:49:54,049 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 22:49:54,049 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 22:49:54,049 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 22:49:54,049 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 22:49:54,049 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-28 22:49:54,050 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 22:49:54,050 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 22:49:54,050 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 22:49:54,051 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 22:49:54,051 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 22:49:54,051 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 22:49:54,051 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 22:49:54,053 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 22:49:54,053 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 22:49:54,054 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 22:49:54,054 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 22:49:54,054 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 22:49:54,055 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 22:49:54,055 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 22:49:54,055 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 22:49:54,055 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 22:49:54,055 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 22:49:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 22:49:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 22:49:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 22:49:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 22:49:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 22:49:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 22:49:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 22:49:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 22:49:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 22:49:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 22:49:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 22:49:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 22:49:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 22:49:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 22:49:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 22:49:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 22:49:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 22:49:54,060 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 22:49:54,060 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 22:49:54,060 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 22:49:54,060 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 22:49:54,060 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 22:49:54,061 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 22:49:54,061 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 22:49:54,061 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 22:49:54,061 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 22:49:54,061 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 22:49:54,062 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 22:49:54,062 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 22:49:54,063 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 22:49:54,063 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 22:49:54,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 22:49:54,064 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 22:49:54,065 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 22:49:54,065 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 22:49:54,065 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 22:49:54,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 22:49:54,065 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 22:49:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 22:49:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 22:49:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 22:49:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 22:49:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 22:49:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 22:49:54,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 22:49:54,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 22:49:54,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 22:49:54,777 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 22:49:54,778 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-28 22:49:54,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:49:54 BoogieIcfgContainer [2021-10-28 22:49:54,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 22:49:54,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 22:49:54,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 22:49:54,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 22:49:54,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:49:53" (1/3) ... [2021-10-28 22:49:54,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a304c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:49:54, skipping insertion in model container [2021-10-28 22:49:54,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:53" (2/3) ... [2021-10-28 22:49:54,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a304c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:49:54, skipping insertion in model container [2021-10-28 22:49:54,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:49:54" (3/3) ... [2021-10-28 22:49:54,797 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-simple-white-blue-1.i [2021-10-28 22:49:54,806 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 22:49:54,833 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 45 error locations. [2021-10-28 22:49:54,901 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 22:49:54,907 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 22:49:54,907 INFO L340 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2021-10-28 22:49:54,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 99 states have internal predecessors, (115), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:49:54,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-28 22:49:54,933 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:54,934 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:54,935 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:49:54,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:54,941 INFO L85 PathProgramCache]: Analyzing trace with hash -328980574, now seen corresponding path program 1 times [2021-10-28 22:49:54,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:54,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730402359] [2021-10-28 22:49:54,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:54,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:55,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:49:55,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:55,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730402359] [2021-10-28 22:49:55,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730402359] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:49:55,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:49:55,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 22:49:55,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395385565] [2021-10-28 22:49:55,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:49:55,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:55,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:49:55,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:49:55,233 INFO L87 Difference]: Start difference. First operand has 104 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 99 states have internal predecessors, (115), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:55,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:55,569 INFO L93 Difference]: Finished difference Result 131 states and 140 transitions. [2021-10-28 22:49:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:49:55,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-28 22:49:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:55,583 INFO L225 Difference]: With dead ends: 131 [2021-10-28 22:49:55,583 INFO L226 Difference]: Without dead ends: 127 [2021-10-28 22:49:55,585 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:49:55,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-28 22:49:55,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2021-10-28 22:49:55,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 94 states have internal predecessors, (101), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:55,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2021-10-28 22:49:55,632 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 7 [2021-10-28 22:49:55,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:55,632 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2021-10-28 22:49:55,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:55,633 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2021-10-28 22:49:55,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-28 22:49:55,633 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:55,634 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:55,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 22:49:55,634 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:49:55,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:55,635 INFO L85 PathProgramCache]: Analyzing trace with hash -328980573, now seen corresponding path program 1 times [2021-10-28 22:49:55,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:55,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480848885] [2021-10-28 22:49:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:55,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:55,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:49:55,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:55,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480848885] [2021-10-28 22:49:55,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480848885] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:49:55,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:49:55,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 22:49:55,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267855905] [2021-10-28 22:49:55,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:49:55,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:55,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:49:55,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:49:55,788 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:56,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:56,171 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2021-10-28 22:49:56,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:49:56,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-28 22:49:56,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:56,180 INFO L225 Difference]: With dead ends: 125 [2021-10-28 22:49:56,181 INFO L226 Difference]: Without dead ends: 125 [2021-10-28 22:49:56,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:49:56,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-28 22:49:56,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2021-10-28 22:49:56,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 52 states have (on average 1.9038461538461537) internal successors, (99), 92 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2021-10-28 22:49:56,204 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 7 [2021-10-28 22:49:56,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:56,204 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2021-10-28 22:49:56,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:56,205 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2021-10-28 22:49:56,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 22:49:56,206 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:56,206 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:56,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 22:49:56,206 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:49:56,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:56,207 INFO L85 PathProgramCache]: Analyzing trace with hash -761839981, now seen corresponding path program 1 times [2021-10-28 22:49:56,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:56,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097491842] [2021-10-28 22:49:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:56,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:56,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:49:56,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:56,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097491842] [2021-10-28 22:49:56,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097491842] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:49:56,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:49:56,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 22:49:56,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891621819] [2021-10-28 22:49:56,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:49:56,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:56,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:49:56,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:49:56,348 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:56,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:56,598 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2021-10-28 22:49:56,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:49:56,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-28 22:49:56,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:56,606 INFO L225 Difference]: With dead ends: 99 [2021-10-28 22:49:56,606 INFO L226 Difference]: Without dead ends: 99 [2021-10-28 22:49:56,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:49:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-28 22:49:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2021-10-28 22:49:56,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 87 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:56,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2021-10-28 22:49:56,633 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 12 [2021-10-28 22:49:56,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:56,633 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2021-10-28 22:49:56,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:56,634 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2021-10-28 22:49:56,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 22:49:56,635 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:56,635 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:56,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 22:49:56,636 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:49:56,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:56,637 INFO L85 PathProgramCache]: Analyzing trace with hash -761839980, now seen corresponding path program 1 times [2021-10-28 22:49:56,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:56,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028247744] [2021-10-28 22:49:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:56,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:56,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:49:56,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:56,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028247744] [2021-10-28 22:49:56,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028247744] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:49:56,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:49:56,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:49:56,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789396198] [2021-10-28 22:49:56,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:49:56,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:56,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:49:56,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:49:56,854 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:57,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:57,252 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2021-10-28 22:49:57,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:49:57,253 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-28 22:49:57,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:57,255 INFO L225 Difference]: With dead ends: 121 [2021-10-28 22:49:57,256 INFO L226 Difference]: Without dead ends: 121 [2021-10-28 22:49:57,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:49:57,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-28 22:49:57,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 106. [2021-10-28 22:49:57,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 77 states have (on average 1.4935064935064934) internal successors, (115), 102 states have internal predecessors, (115), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:57,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2021-10-28 22:49:57,284 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 12 [2021-10-28 22:49:57,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:57,285 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2021-10-28 22:49:57,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:57,286 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2021-10-28 22:49:57,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 22:49:57,288 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:57,288 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:57,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 22:49:57,289 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:49:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:57,290 INFO L85 PathProgramCache]: Analyzing trace with hash 551534933, now seen corresponding path program 1 times [2021-10-28 22:49:57,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:57,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625712397] [2021-10-28 22:49:57,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:57,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:57,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:49:57,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:57,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625712397] [2021-10-28 22:49:57,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625712397] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:49:57,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:49:57,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:49:57,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664682704] [2021-10-28 22:49:57,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:49:57,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:57,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:49:57,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:49:57,466 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:57,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:57,779 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2021-10-28 22:49:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:49:57,780 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-28 22:49:57,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:57,781 INFO L225 Difference]: With dead ends: 107 [2021-10-28 22:49:57,782 INFO L226 Difference]: Without dead ends: 107 [2021-10-28 22:49:57,782 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:49:57,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-28 22:49:57,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2021-10-28 22:49:57,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 77 states have (on average 1.4805194805194806) internal successors, (114), 101 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:57,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2021-10-28 22:49:57,788 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 16 [2021-10-28 22:49:57,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:57,789 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2021-10-28 22:49:57,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:57,789 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2021-10-28 22:49:57,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 22:49:57,790 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:57,791 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:57,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 22:49:57,791 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:49:57,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:57,792 INFO L85 PathProgramCache]: Analyzing trace with hash 551534934, now seen corresponding path program 1 times [2021-10-28 22:49:57,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:57,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763558436] [2021-10-28 22:49:57,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:57,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:57,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:49:57,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:57,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763558436] [2021-10-28 22:49:57,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763558436] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:49:57,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:49:57,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:49:57,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271601029] [2021-10-28 22:49:57,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:49:57,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:57,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:49:57,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:49:57,907 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:58,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:58,281 INFO L93 Difference]: Finished difference Result 105 states and 118 transitions. [2021-10-28 22:49:58,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 22:49:58,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-28 22:49:58,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:58,288 INFO L225 Difference]: With dead ends: 105 [2021-10-28 22:49:58,288 INFO L226 Difference]: Without dead ends: 105 [2021-10-28 22:49:58,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-28 22:49:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-28 22:49:58,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2021-10-28 22:49:58,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.4444444444444444) internal successors, (104), 92 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:58,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2021-10-28 22:49:58,292 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 16 [2021-10-28 22:49:58,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:58,293 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2021-10-28 22:49:58,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:58,293 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2021-10-28 22:49:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 22:49:58,294 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:58,294 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:58,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 22:49:58,295 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:49:58,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:58,296 INFO L85 PathProgramCache]: Analyzing trace with hash -393029940, now seen corresponding path program 1 times [2021-10-28 22:49:58,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:58,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865706841] [2021-10-28 22:49:58,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:58,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:58,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:49:58,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:58,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865706841] [2021-10-28 22:49:58,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865706841] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:49:58,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:49:58,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:49:58,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515937397] [2021-10-28 22:49:58,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:49:58,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:58,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:49:58,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:49:58,446 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:58,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:58,660 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2021-10-28 22:49:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:49:58,661 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-28 22:49:58,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:58,662 INFO L225 Difference]: With dead ends: 107 [2021-10-28 22:49:58,662 INFO L226 Difference]: Without dead ends: 107 [2021-10-28 22:49:58,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:49:58,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-28 22:49:58,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2021-10-28 22:49:58,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 78 states have (on average 1.435897435897436) internal successors, (112), 98 states have internal predecessors, (112), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2021-10-28 22:49:58,667 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 19 [2021-10-28 22:49:58,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:58,668 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2021-10-28 22:49:58,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:58,668 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2021-10-28 22:49:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 22:49:58,669 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:58,669 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:58,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 22:49:58,670 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:49:58,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:58,670 INFO L85 PathProgramCache]: Analyzing trace with hash 229411301, now seen corresponding path program 1 times [2021-10-28 22:49:58,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:58,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966487735] [2021-10-28 22:49:58,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:58,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:58,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:49:58,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:58,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966487735] [2021-10-28 22:49:58,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966487735] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:58,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917742620] [2021-10-28 22:49:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:58,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:49:58,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:49:58,875 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:49:58,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 22:49:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:59,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 22:49:59,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:49:59,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:49:59,287 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 22:49:59,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 22:49:59,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 22:49:59,622 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 30 treesize of output 18 [2021-10-28 22:49:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:49:59,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917742620] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:59,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:49:59,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-10-28 22:49:59,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696707619] [2021-10-28 22:49:59,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 22:49:59,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:59,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 22:49:59,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-28 22:49:59,763 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:00,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:00,367 INFO L93 Difference]: Finished difference Result 150 states and 165 transitions. [2021-10-28 22:50:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 22:50:00,368 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-10-28 22:50:00,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:00,369 INFO L225 Difference]: With dead ends: 150 [2021-10-28 22:50:00,369 INFO L226 Difference]: Without dead ends: 150 [2021-10-28 22:50:00,370 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-10-28 22:50:00,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-28 22:50:00,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 105. [2021-10-28 22:50:00,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 101 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:00,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2021-10-28 22:50:00,375 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 22 [2021-10-28 22:50:00,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:00,376 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2021-10-28 22:50:00,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:00,376 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2021-10-28 22:50:00,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 22:50:00,377 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:00,377 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:00,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 22:50:00,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-28 22:50:00,599 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr29REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:00,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:00,600 INFO L85 PathProgramCache]: Analyzing trace with hash 229411302, now seen corresponding path program 1 times [2021-10-28 22:50:00,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:00,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222292004] [2021-10-28 22:50:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:00,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:00,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:00,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:00,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222292004] [2021-10-28 22:50:00,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222292004] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:00,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223871605] [2021-10-28 22:50:00,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:00,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:00,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:50:00,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:50:00,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 22:50:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:00,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 22:50:00,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:50:00,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:50:01,138 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:50:01,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:50:01,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 treesize of output 16 [2021-10-28 22:50:01,253 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 37 treesize of output 33 [2021-10-28 22:50:01,262 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 34 treesize of output 30 [2021-10-28 22:50:01,509 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 50 treesize of output 38 [2021-10-28 22:50:01,516 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 35 treesize of output 23 [2021-10-28 22:50:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:01,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223871605] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:01,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:50:01,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-28 22:50:01,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010019660] [2021-10-28 22:50:01,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 22:50:01,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:01,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 22:50:01,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-10-28 22:50:01,626 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:02,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:02,838 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2021-10-28 22:50:02,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 22:50:02,839 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-10-28 22:50:02,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:02,842 INFO L225 Difference]: With dead ends: 171 [2021-10-28 22:50:02,842 INFO L226 Difference]: Without dead ends: 171 [2021-10-28 22:50:02,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-10-28 22:50:02,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-28 22:50:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 104. [2021-10-28 22:50:02,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 81 states have (on average 1.4074074074074074) internal successors, (114), 100 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:02,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2021-10-28 22:50:02,849 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 22 [2021-10-28 22:50:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:02,850 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2021-10-28 22:50:02,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2021-10-28 22:50:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 22:50:02,851 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:02,851 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:02,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 22:50:03,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:03,076 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:03,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:03,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1479815103, now seen corresponding path program 1 times [2021-10-28 22:50:03,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:03,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174140512] [2021-10-28 22:50:03,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:03,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:03,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:03,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:03,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174140512] [2021-10-28 22:50:03,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174140512] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:50:03,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:50:03,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 22:50:03,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244342546] [2021-10-28 22:50:03,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 22:50:03,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:03,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 22:50:03,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:50:03,249 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:03,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:03,637 INFO L93 Difference]: Finished difference Result 148 states and 164 transitions. [2021-10-28 22:50:03,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 22:50:03,637 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-28 22:50:03,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:03,639 INFO L225 Difference]: With dead ends: 148 [2021-10-28 22:50:03,639 INFO L226 Difference]: Without dead ends: 148 [2021-10-28 22:50:03,639 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:50:03,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-28 22:50:03,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 108. [2021-10-28 22:50:03,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 85 states have (on average 1.411764705882353) internal successors, (120), 104 states have internal predecessors, (120), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:03,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2021-10-28 22:50:03,644 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 23 [2021-10-28 22:50:03,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:03,645 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2021-10-28 22:50:03,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:03,645 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2021-10-28 22:50:03,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 22:50:03,646 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:03,646 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:03,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 22:50:03,647 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:03,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:03,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1479815102, now seen corresponding path program 1 times [2021-10-28 22:50:03,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:03,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519934944] [2021-10-28 22:50:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:03,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:03,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:03,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:03,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519934944] [2021-10-28 22:50:03,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519934944] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:50:03,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:50:03,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 22:50:03,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566013480] [2021-10-28 22:50:03,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 22:50:03,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:03,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 22:50:03,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:50:03,820 INFO L87 Difference]: Start difference. First operand 108 states and 123 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:04,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:04,456 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2021-10-28 22:50:04,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 22:50:04,456 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-28 22:50:04,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:04,458 INFO L225 Difference]: With dead ends: 171 [2021-10-28 22:50:04,458 INFO L226 Difference]: Without dead ends: 171 [2021-10-28 22:50:04,458 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-10-28 22:50:04,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-28 22:50:04,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 110. [2021-10-28 22:50:04,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 87 states have (on average 1.4022988505747127) internal successors, (122), 106 states have internal predecessors, (122), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:04,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2021-10-28 22:50:04,464 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 23 [2021-10-28 22:50:04,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:04,465 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2021-10-28 22:50:04,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:04,465 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2021-10-28 22:50:04,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 22:50:04,466 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:04,466 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:04,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 22:50:04,467 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr36ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:04,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:04,468 INFO L85 PathProgramCache]: Analyzing trace with hash -468135674, now seen corresponding path program 1 times [2021-10-28 22:50:04,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:04,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829586157] [2021-10-28 22:50:04,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:04,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:04,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:04,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:04,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829586157] [2021-10-28 22:50:04,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829586157] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:50:04,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:50:04,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-28 22:50:04,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804423557] [2021-10-28 22:50:04,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 22:50:04,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:04,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 22:50:04,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:50:04,683 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:05,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:05,316 INFO L93 Difference]: Finished difference Result 208 states and 230 transitions. [2021-10-28 22:50:05,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 22:50:05,317 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-10-28 22:50:05,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:05,319 INFO L225 Difference]: With dead ends: 208 [2021-10-28 22:50:05,319 INFO L226 Difference]: Without dead ends: 208 [2021-10-28 22:50:05,320 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-10-28 22:50:05,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-10-28 22:50:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 121. [2021-10-28 22:50:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 98 states have (on average 1.3775510204081634) internal successors, (135), 117 states have internal predecessors, (135), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 138 transitions. [2021-10-28 22:50:05,326 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 138 transitions. Word has length 25 [2021-10-28 22:50:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:05,326 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 138 transitions. [2021-10-28 22:50:05,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 138 transitions. [2021-10-28 22:50:05,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 22:50:05,328 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:05,328 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:05,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 22:50:05,329 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr44ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:05,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:05,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1628132728, now seen corresponding path program 1 times [2021-10-28 22:50:05,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:05,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664198800] [2021-10-28 22:50:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:05,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:05,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:05,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:05,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664198800] [2021-10-28 22:50:05,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664198800] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:50:05,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:50:05,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 22:50:05,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797298028] [2021-10-28 22:50:05,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:50:05,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:05,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:50:05,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:50:05,396 INFO L87 Difference]: Start difference. First operand 121 states and 138 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:05,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:05,538 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2021-10-28 22:50:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:50:05,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-10-28 22:50:05,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:05,539 INFO L225 Difference]: With dead ends: 140 [2021-10-28 22:50:05,540 INFO L226 Difference]: Without dead ends: 140 [2021-10-28 22:50:05,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:50:05,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-28 22:50:05,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 121. [2021-10-28 22:50:05,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 98 states have (on average 1.3673469387755102) internal successors, (134), 117 states have internal predecessors, (134), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:05,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 137 transitions. [2021-10-28 22:50:05,545 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 137 transitions. Word has length 26 [2021-10-28 22:50:05,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:05,546 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 137 transitions. [2021-10-28 22:50:05,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:05,546 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 137 transitions. [2021-10-28 22:50:05,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 22:50:05,547 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:05,547 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:05,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 22:50:05,548 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:05,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:05,548 INFO L85 PathProgramCache]: Analyzing trace with hash -285231333, now seen corresponding path program 2 times [2021-10-28 22:50:05,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:05,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534166332] [2021-10-28 22:50:05,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:05,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:05,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 22:50:05,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:05,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534166332] [2021-10-28 22:50:05,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534166332] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:50:05,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:50:05,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 22:50:05,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410085380] [2021-10-28 22:50:05,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 22:50:05,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:05,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 22:50:05,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:50:05,709 INFO L87 Difference]: Start difference. First operand 121 states and 137 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:05,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:05,960 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2021-10-28 22:50:05,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:50:05,960 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-10-28 22:50:05,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:05,962 INFO L225 Difference]: With dead ends: 149 [2021-10-28 22:50:05,962 INFO L226 Difference]: Without dead ends: 149 [2021-10-28 22:50:05,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:50:05,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-28 22:50:05,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 119. [2021-10-28 22:50:05,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 96 states have (on average 1.3541666666666667) internal successors, (130), 115 states have internal predecessors, (130), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:05,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 133 transitions. [2021-10-28 22:50:05,968 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 133 transitions. Word has length 26 [2021-10-28 22:50:05,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:05,968 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 133 transitions. [2021-10-28 22:50:05,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:05,969 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 133 transitions. [2021-10-28 22:50:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 22:50:05,970 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:05,986 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:05,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 22:50:05,987 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:05,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1043552509, now seen corresponding path program 1 times [2021-10-28 22:50:05,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:05,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153075470] [2021-10-28 22:50:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:05,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:06,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:06,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:06,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153075470] [2021-10-28 22:50:06,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153075470] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:50:06,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:50:06,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 22:50:06,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589504112] [2021-10-28 22:50:06,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 22:50:06,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:06,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 22:50:06,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:50:06,146 INFO L87 Difference]: Start difference. First operand 119 states and 133 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:06,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:06,475 INFO L93 Difference]: Finished difference Result 168 states and 184 transitions. [2021-10-28 22:50:06,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:50:06,475 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-28 22:50:06,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:06,477 INFO L225 Difference]: With dead ends: 168 [2021-10-28 22:50:06,477 INFO L226 Difference]: Without dead ends: 168 [2021-10-28 22:50:06,477 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:50:06,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-10-28 22:50:06,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 122. [2021-10-28 22:50:06,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 99 states have (on average 1.3434343434343434) internal successors, (133), 118 states have internal predecessors, (133), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:06,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 136 transitions. [2021-10-28 22:50:06,482 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 136 transitions. Word has length 27 [2021-10-28 22:50:06,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:06,482 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 136 transitions. [2021-10-28 22:50:06,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:06,483 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 136 transitions. [2021-10-28 22:50:06,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 22:50:06,484 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:06,484 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:06,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 22:50:06,484 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:06,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:06,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1159983514, now seen corresponding path program 1 times [2021-10-28 22:50:06,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:06,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438010265] [2021-10-28 22:50:06,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:06,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:06,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:06,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:06,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438010265] [2021-10-28 22:50:06,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438010265] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:06,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232975212] [2021-10-28 22:50:06,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:06,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:06,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:50:06,700 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:50:06,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 22:50:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:06,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 22:50:06,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:50:06,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:50:07,037 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 22:50:07,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 22:50:07,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 22:50:07,271 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-28 22:50:07,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 20 [2021-10-28 22:50:07,308 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:50:07,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-28 22:50:07,557 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:50:07,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-10-28 22:50:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:07,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232975212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:07,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:50:07,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-10-28 22:50:07,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695882534] [2021-10-28 22:50:07,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 22:50:07,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:07,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 22:50:07,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-10-28 22:50:07,650 INFO L87 Difference]: Start difference. First operand 122 states and 136 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:08,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:08,732 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2021-10-28 22:50:08,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 22:50:08,732 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-28 22:50:08,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:08,734 INFO L225 Difference]: With dead ends: 185 [2021-10-28 22:50:08,734 INFO L226 Difference]: Without dead ends: 185 [2021-10-28 22:50:08,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=304, Invalid=1178, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 22:50:08,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-10-28 22:50:08,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 138. [2021-10-28 22:50:08,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 115 states have (on average 1.3391304347826087) internal successors, (154), 134 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:08,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 157 transitions. [2021-10-28 22:50:08,739 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 157 transitions. Word has length 27 [2021-10-28 22:50:08,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:08,740 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 157 transitions. [2021-10-28 22:50:08,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:08,740 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 157 transitions. [2021-10-28 22:50:08,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 22:50:08,740 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:08,741 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:08,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 22:50:08,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:08,941 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:08,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:08,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1159983515, now seen corresponding path program 1 times [2021-10-28 22:50:08,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:08,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210485995] [2021-10-28 22:50:08,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:08,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:09,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:09,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:09,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210485995] [2021-10-28 22:50:09,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210485995] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:09,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960829391] [2021-10-28 22:50:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:09,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:09,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:50:09,244 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:50:09,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 22:50:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:09,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-28 22:50:09,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:50:09,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:50:09,587 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:50:09,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:50:09,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:50:09,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 22:50:09,652 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 [2021-10-28 22:50:09,848 INFO L354 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2021-10-28 22:50:09,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2021-10-28 22:50:09,869 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-28 22:50:09,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 20 [2021-10-28 22:50:09,927 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:50:09,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-10-28 22:50:09,941 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 22:50:09,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-28 22:50:10,248 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:50:10,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 40 [2021-10-28 22:50:10,253 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:50:10,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-10-28 22:50:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:10,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960829391] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:10,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:50:10,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-10-28 22:50:10,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136847949] [2021-10-28 22:50:10,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 22:50:10,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:10,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 22:50:10,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-10-28 22:50:10,269 INFO L87 Difference]: Start difference. First operand 138 states and 157 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:11,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:11,300 INFO L93 Difference]: Finished difference Result 194 states and 217 transitions. [2021-10-28 22:50:11,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 22:50:11,300 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-28 22:50:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:11,302 INFO L225 Difference]: With dead ends: 194 [2021-10-28 22:50:11,302 INFO L226 Difference]: Without dead ends: 194 [2021-10-28 22:50:11,303 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 22:50:11,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-10-28 22:50:11,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 146. [2021-10-28 22:50:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 142 states have internal predecessors, (163), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:11,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 166 transitions. [2021-10-28 22:50:11,308 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 166 transitions. Word has length 27 [2021-10-28 22:50:11,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:11,309 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 166 transitions. [2021-10-28 22:50:11,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:11,309 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 166 transitions. [2021-10-28 22:50:11,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 22:50:11,310 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:11,310 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:11,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 22:50:11,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 22:50:11,524 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:11,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:11,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2011241431, now seen corresponding path program 1 times [2021-10-28 22:50:11,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:11,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272857589] [2021-10-28 22:50:11,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:11,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:11,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:11,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:11,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272857589] [2021-10-28 22:50:11,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272857589] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:50:11,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:50:11,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-28 22:50:11,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767897462] [2021-10-28 22:50:11,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 22:50:11,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:11,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 22:50:11,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:50:11,702 INFO L87 Difference]: Start difference. First operand 146 states and 166 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:12,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:12,119 INFO L93 Difference]: Finished difference Result 174 states and 194 transitions. [2021-10-28 22:50:12,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 22:50:12,119 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-10-28 22:50:12,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:12,120 INFO L225 Difference]: With dead ends: 174 [2021-10-28 22:50:12,120 INFO L226 Difference]: Without dead ends: 174 [2021-10-28 22:50:12,121 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-10-28 22:50:12,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-10-28 22:50:12,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 158. [2021-10-28 22:50:12,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 135 states have (on average 1.2962962962962963) internal successors, (175), 154 states have internal predecessors, (175), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:12,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 178 transitions. [2021-10-28 22:50:12,126 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 178 transitions. Word has length 28 [2021-10-28 22:50:12,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:12,127 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 178 transitions. [2021-10-28 22:50:12,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:12,127 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 178 transitions. [2021-10-28 22:50:12,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 22:50:12,128 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:12,128 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:12,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-28 22:50:12,128 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:12,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:12,129 INFO L85 PathProgramCache]: Analyzing trace with hash -452904322, now seen corresponding path program 1 times [2021-10-28 22:50:12,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:12,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075160535] [2021-10-28 22:50:12,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:12,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:12,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:12,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:12,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075160535] [2021-10-28 22:50:12,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075160535] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:12,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296754076] [2021-10-28 22:50:12,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:12,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:12,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:50:12,328 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:50:12,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 22:50:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:12,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 22:50:12,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:50:12,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:50:12,627 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 [2021-10-28 22:50:12,635 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 [2021-10-28 22:50:12,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:50:12,692 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 27 treesize of output 11 [2021-10-28 22:50:12,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:50:12,699 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 27 treesize of output 11 [2021-10-28 22:50:12,794 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:50:12,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:50:12,849 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 27 treesize of output 11 [2021-10-28 22:50:12,857 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 27 treesize of output 11 [2021-10-28 22:50:12,905 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 22:50:12,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-10-28 22:50:12,925 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-28 22:50:12,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-10-28 22:50:13,316 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-28 22:50:13,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 42 [2021-10-28 22:50:13,336 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-28 22:50:13,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 23 [2021-10-28 22:50:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:13,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296754076] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:13,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:50:13,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-28 22:50:13,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359557832] [2021-10-28 22:50:13,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 22:50:13,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:13,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 22:50:13,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-10-28 22:50:13,354 INFO L87 Difference]: Start difference. First operand 158 states and 178 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:14,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:14,215 INFO L93 Difference]: Finished difference Result 189 states and 210 transitions. [2021-10-28 22:50:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 22:50:14,216 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-10-28 22:50:14,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:14,217 INFO L225 Difference]: With dead ends: 189 [2021-10-28 22:50:14,217 INFO L226 Difference]: Without dead ends: 189 [2021-10-28 22:50:14,218 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-10-28 22:50:14,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-10-28 22:50:14,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 160. [2021-10-28 22:50:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 137 states have (on average 1.2919708029197081) internal successors, (177), 156 states have internal predecessors, (177), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:14,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 180 transitions. [2021-10-28 22:50:14,223 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 180 transitions. Word has length 28 [2021-10-28 22:50:14,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:14,224 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 180 transitions. [2021-10-28 22:50:14,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:14,224 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 180 transitions. [2021-10-28 22:50:14,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 22:50:14,225 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:14,225 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:14,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 22:50:14,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:14,426 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr42ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:14,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:14,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1266001972, now seen corresponding path program 1 times [2021-10-28 22:50:14,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:14,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867038090] [2021-10-28 22:50:14,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:14,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:14,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:14,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:14,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867038090] [2021-10-28 22:50:14,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867038090] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:50:14,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:50:14,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 22:50:14,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975047921] [2021-10-28 22:50:14,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:50:14,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:14,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:50:14,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:50:14,516 INFO L87 Difference]: Start difference. First operand 160 states and 180 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:14,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:14,808 INFO L93 Difference]: Finished difference Result 197 states and 215 transitions. [2021-10-28 22:50:14,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:50:14,809 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-10-28 22:50:14,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:14,810 INFO L225 Difference]: With dead ends: 197 [2021-10-28 22:50:14,810 INFO L226 Difference]: Without dead ends: 197 [2021-10-28 22:50:14,810 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-10-28 22:50:14,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-28 22:50:14,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 160. [2021-10-28 22:50:14,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 137 states have (on average 1.2773722627737227) internal successors, (175), 156 states have internal predecessors, (175), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:14,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 178 transitions. [2021-10-28 22:50:14,815 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 178 transitions. Word has length 28 [2021-10-28 22:50:14,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:14,816 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 178 transitions. [2021-10-28 22:50:14,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:14,816 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 178 transitions. [2021-10-28 22:50:14,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 22:50:14,817 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:14,817 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:14,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-28 22:50:14,817 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:14,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:14,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1046433091, now seen corresponding path program 2 times [2021-10-28 22:50:14,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:14,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784082532] [2021-10-28 22:50:14,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:14,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:15,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:15,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:15,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784082532] [2021-10-28 22:50:15,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784082532] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:15,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570091017] [2021-10-28 22:50:15,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:50:15,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:15,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:50:15,076 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:50:15,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 22:50:15,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:50:15,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:50:15,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-28 22:50:15,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:50:15,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:50:15,552 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:50:15,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:50:15,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 22:50:15,614 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 [2021-10-28 22:50:15,749 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-28 22:50:15,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2021-10-28 22:50:15,757 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 27 treesize of output 11 [2021-10-28 22:50:15,812 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 22:50:15,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-10-28 22:50:15,824 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 22:50:15,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 41 [2021-10-28 22:50:16,148 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-28 22:50:16,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2021-10-28 22:50:16,153 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:50:16,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 17 [2021-10-28 22:50:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:16,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570091017] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:16,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:50:16,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-10-28 22:50:16,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195908554] [2021-10-28 22:50:16,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 22:50:16,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:16,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 22:50:16,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-10-28 22:50:16,172 INFO L87 Difference]: Start difference. First operand 160 states and 178 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:19,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:19,069 INFO L93 Difference]: Finished difference Result 192 states and 209 transitions. [2021-10-28 22:50:19,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 22:50:19,070 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-10-28 22:50:19,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:19,072 INFO L225 Difference]: With dead ends: 192 [2021-10-28 22:50:19,072 INFO L226 Difference]: Without dead ends: 192 [2021-10-28 22:50:19,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 22:50:19,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-28 22:50:19,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 159. [2021-10-28 22:50:19,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 136 states have (on average 1.2647058823529411) internal successors, (172), 155 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 175 transitions. [2021-10-28 22:50:19,078 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 175 transitions. Word has length 32 [2021-10-28 22:50:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:19,078 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 175 transitions. [2021-10-28 22:50:19,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 175 transitions. [2021-10-28 22:50:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 22:50:19,079 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:19,079 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:19,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 22:50:19,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:19,296 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr42ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:19,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:19,296 INFO L85 PathProgramCache]: Analyzing trace with hash 135230692, now seen corresponding path program 1 times [2021-10-28 22:50:19,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:19,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410057732] [2021-10-28 22:50:19,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:19,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:19,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:19,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:19,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:19,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410057732] [2021-10-28 22:50:19,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410057732] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:50:19,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:50:19,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 22:50:19,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965610017] [2021-10-28 22:50:19,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:50:19,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:19,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:50:19,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:50:19,387 INFO L87 Difference]: Start difference. First operand 159 states and 175 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:19,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:19,556 INFO L93 Difference]: Finished difference Result 163 states and 179 transitions. [2021-10-28 22:50:19,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:50:19,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-10-28 22:50:19,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:19,561 INFO L225 Difference]: With dead ends: 163 [2021-10-28 22:50:19,561 INFO L226 Difference]: Without dead ends: 163 [2021-10-28 22:50:19,562 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:50:19,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-28 22:50:19,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 160. [2021-10-28 22:50:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 137 states have (on average 1.2627737226277371) internal successors, (173), 156 states have internal predecessors, (173), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:19,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2021-10-28 22:50:19,566 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 33 [2021-10-28 22:50:19,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:19,567 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2021-10-28 22:50:19,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:19,567 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2021-10-28 22:50:19,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 22:50:19,570 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:19,570 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:19,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-28 22:50:19,571 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr36ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:19,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:19,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1020126892, now seen corresponding path program 1 times [2021-10-28 22:50:19,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:19,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569674465] [2021-10-28 22:50:19,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:19,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:19,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:19,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:19,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569674465] [2021-10-28 22:50:19,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569674465] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:19,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790337360] [2021-10-28 22:50:19,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:19,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:19,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:50:19,972 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:50:19,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 22:50:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:20,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-28 22:50:20,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:50:20,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:50:20,292 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 13 treesize of output 9 [2021-10-28 22:50:20,376 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:50:20,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:50:20,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 22:50:20,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:50:20,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2021-10-28 22:50:20,498 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 19 treesize of output 11 [2021-10-28 22:50:20,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:50:20,557 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 23 treesize of output 22 [2021-10-28 22:50:20,623 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-28 22:50:20,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 29 [2021-10-28 22:50:20,790 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:50:20,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:50:20,874 INFO L354 Elim1Store]: treesize reduction 43, result has 28.3 percent of original size [2021-10-28 22:50:20,874 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 2 case distinctions, treesize of input 36 treesize of output 46 [2021-10-28 22:50:20,977 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 [2021-10-28 22:50:20,981 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 43 treesize of output 39 [2021-10-28 22:50:20,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:50:20,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 22:50:20,989 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:50:20,989 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 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-28 22:50:21,146 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 40 treesize of output 32 [2021-10-28 22:50:21,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-28 22:50:21,259 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:50:21,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-10-28 22:50:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:21,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790337360] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:21,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:50:21,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-10-28 22:50:21,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302379248] [2021-10-28 22:50:21,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 22:50:21,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:21,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 22:50:21,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-10-28 22:50:21,270 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:22,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:22,557 INFO L93 Difference]: Finished difference Result 239 states and 257 transitions. [2021-10-28 22:50:22,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 22:50:22,557 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-10-28 22:50:22,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:22,559 INFO L225 Difference]: With dead ends: 239 [2021-10-28 22:50:22,559 INFO L226 Difference]: Without dead ends: 239 [2021-10-28 22:50:22,560 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=298, Invalid=2054, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 22:50:22,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-10-28 22:50:22,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 171. [2021-10-28 22:50:22,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 148 states have (on average 1.2432432432432432) internal successors, (184), 167 states have internal predecessors, (184), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:22,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 187 transitions. [2021-10-28 22:50:22,566 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 187 transitions. Word has length 33 [2021-10-28 22:50:22,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:22,566 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 187 transitions. [2021-10-28 22:50:22,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:22,567 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 187 transitions. [2021-10-28 22:50:22,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 22:50:22,567 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:22,568 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:22,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 22:50:22,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 22:50:22,784 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:22,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:22,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1022599576, now seen corresponding path program 3 times [2021-10-28 22:50:22,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:22,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944397826] [2021-10-28 22:50:22,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:22,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:23,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:23,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:23,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944397826] [2021-10-28 22:50:23,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944397826] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:23,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332531989] [2021-10-28 22:50:23,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 22:50:23,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:23,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:50:23,092 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:50:23,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 22:50:23,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 22:50:23,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:50:23,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 22:50:23,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:50:23,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:50:23,588 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:50:23,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:50:23,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 22:50:23,768 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-28 22:50:23,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2021-10-28 22:50:23,818 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:50:23,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-10-28 22:50:23,891 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:50:23,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:50:23,958 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-28 22:50:23,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 29 [2021-10-28 22:50:24,158 INFO L354 Elim1Store]: treesize reduction 70, result has 26.3 percent of original size [2021-10-28 22:50:24,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 44 [2021-10-28 22:50:24,263 INFO L354 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2021-10-28 22:50:24,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 53 [2021-10-28 22:50:24,706 INFO L354 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2021-10-28 22:50:24,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 75 [2021-10-28 22:50:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:24,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332531989] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:24,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:50:24,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-10-28 22:50:24,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396927922] [2021-10-28 22:50:24,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 22:50:24,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:24,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 22:50:24,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-10-28 22:50:24,775 INFO L87 Difference]: Start difference. First operand 171 states and 187 transitions. Second operand has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:38,635 INFO L93 Difference]: Finished difference Result 237 states and 260 transitions. [2021-10-28 22:50:38,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-28 22:50:38,635 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-10-28 22:50:38,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:38,639 INFO L225 Difference]: With dead ends: 237 [2021-10-28 22:50:38,639 INFO L226 Difference]: Without dead ends: 237 [2021-10-28 22:50:38,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=527, Invalid=3006, Unknown=7, NotChecked=0, Total=3540 [2021-10-28 22:50:38,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-10-28 22:50:38,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 187. [2021-10-28 22:50:38,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 164 states have (on average 1.25) internal successors, (205), 183 states have internal predecessors, (205), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:38,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 208 transitions. [2021-10-28 22:50:38,647 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 208 transitions. Word has length 35 [2021-10-28 22:50:38,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:38,647 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 208 transitions. [2021-10-28 22:50:38,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:38,648 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 208 transitions. [2021-10-28 22:50:38,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 22:50:38,648 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:38,649 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:38,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 22:50:38,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 22:50:38,864 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:38,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:38,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1022599575, now seen corresponding path program 2 times [2021-10-28 22:50:38,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:38,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039435388] [2021-10-28 22:50:38,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:38,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:39,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:39,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:39,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:39,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039435388] [2021-10-28 22:50:39,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039435388] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:39,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406420707] [2021-10-28 22:50:39,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:50:39,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:39,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:50:39,318 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:50:39,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 22:50:39,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:50:39,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:50:39,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-28 22:50:39,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:50:39,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:50:39,944 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:50:39,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:50:39,996 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 [2021-10-28 22:50:40,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 22:50:40,201 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-28 22:50:40,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2021-10-28 22:50:40,209 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 27 treesize of output 11 [2021-10-28 22:50:40,269 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:50:40,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-10-28 22:50:40,289 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:50:40,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-10-28 22:50:40,400 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:50:40,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:50:40,498 INFO L354 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2021-10-28 22:50:40,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2021-10-28 22:50:40,522 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-28 22:50:40,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 29 [2021-10-28 22:50:40,767 INFO L354 Elim1Store]: treesize reduction 70, result has 26.3 percent of original size [2021-10-28 22:50:40,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 49 [2021-10-28 22:50:40,816 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 27 treesize of output 11 [2021-10-28 22:50:40,938 INFO L354 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2021-10-28 22:50:40,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 82 [2021-10-28 22:50:40,961 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:50:40,962 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 1 case distinctions, treesize of input 92 treesize of output 91 [2021-10-28 22:50:42,132 INFO L354 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2021-10-28 22:50:42,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 116 [2021-10-28 22:50:42,174 INFO L354 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2021-10-28 22:50:42,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 132 [2021-10-28 22:50:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:42,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406420707] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:42,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:50:42,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-10-28 22:50:42,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912851351] [2021-10-28 22:50:42,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 22:50:42,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:42,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 22:50:42,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 22:50:42,621 INFO L87 Difference]: Start difference. First operand 187 states and 208 transitions. Second operand has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:48,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:48,527 INFO L93 Difference]: Finished difference Result 246 states and 271 transitions. [2021-10-28 22:50:48,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 22:50:48,528 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-10-28 22:50:48,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:48,529 INFO L225 Difference]: With dead ends: 246 [2021-10-28 22:50:48,529 INFO L226 Difference]: Without dead ends: 246 [2021-10-28 22:50:48,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=436, Invalid=3104, Unknown=0, NotChecked=0, Total=3540 [2021-10-28 22:50:48,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-10-28 22:50:48,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 189. [2021-10-28 22:50:48,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 185 states have internal predecessors, (208), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:48,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 211 transitions. [2021-10-28 22:50:48,537 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 211 transitions. Word has length 35 [2021-10-28 22:50:48,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:48,537 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 211 transitions. [2021-10-28 22:50:48,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:48,538 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 211 transitions. [2021-10-28 22:50:48,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 22:50:48,538 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:48,539 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:48,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 22:50:48,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:48,739 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr39REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:48,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:48,740 INFO L85 PathProgramCache]: Analyzing trace with hash -21569070, now seen corresponding path program 1 times [2021-10-28 22:50:48,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:48,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962897371] [2021-10-28 22:50:48,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:48,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:48,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:48,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:48,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962897371] [2021-10-28 22:50:48,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962897371] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:48,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595851078] [2021-10-28 22:50:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:48,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:48,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:50:48,943 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:50:48,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 22:50:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:49,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 22:50:49,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:50:49,536 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 [2021-10-28 22:50:49,542 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 [2021-10-28 22:50:49,716 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-28 22:50:49,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 30 [2021-10-28 22:50:49,723 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-28 22:50:49,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-10-28 22:50:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:49,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595851078] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:49,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:50:49,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-10-28 22:50:49,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880717515] [2021-10-28 22:50:49,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 22:50:49,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:49,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 22:50:49,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-10-28 22:50:49,759 INFO L87 Difference]: Start difference. First operand 189 states and 211 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:50,537 INFO L93 Difference]: Finished difference Result 230 states and 253 transitions. [2021-10-28 22:50:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 22:50:50,538 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-10-28 22:50:50,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:50,539 INFO L225 Difference]: With dead ends: 230 [2021-10-28 22:50:50,539 INFO L226 Difference]: Without dead ends: 230 [2021-10-28 22:50:50,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-10-28 22:50:50,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-10-28 22:50:50,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 200. [2021-10-28 22:50:50,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 177 states have (on average 1.2429378531073447) internal successors, (220), 196 states have internal predecessors, (220), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:50,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 223 transitions. [2021-10-28 22:50:50,573 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 223 transitions. Word has length 36 [2021-10-28 22:50:50,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:50,573 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 223 transitions. [2021-10-28 22:50:50,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:50,574 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 223 transitions. [2021-10-28 22:50:50,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 22:50:50,576 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:50,576 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:50,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 22:50:50,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 22:50:50,799 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr39REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:50,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:50,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1852042457, now seen corresponding path program 1 times [2021-10-28 22:50:50,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:50,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360967153] [2021-10-28 22:50:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:50,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:51,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:51,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:51,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360967153] [2021-10-28 22:50:51,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360967153] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:51,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236166688] [2021-10-28 22:50:51,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:51,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:51,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:50:51,020 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:50:51,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 22:50:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:51,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 22:50:51,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:50:51,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:50:51,512 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:50:51,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:50:51,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 22:50:51,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 22:50:51,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-10-28 22:50:52,004 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 22:50:52,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 22:50:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:52,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236166688] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:52,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:50:52,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-10-28 22:50:52,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509900596] [2021-10-28 22:50:52,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 22:50:52,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:52,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 22:50:52,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-10-28 22:50:52,056 INFO L87 Difference]: Start difference. First operand 200 states and 223 transitions. Second operand has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:53,258 INFO L93 Difference]: Finished difference Result 232 states and 255 transitions. [2021-10-28 22:50:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 22:50:53,258 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-10-28 22:50:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:53,260 INFO L225 Difference]: With dead ends: 232 [2021-10-28 22:50:53,260 INFO L226 Difference]: Without dead ends: 232 [2021-10-28 22:50:53,260 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=266, Invalid=1626, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 22:50:53,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-10-28 22:50:53,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 214. [2021-10-28 22:50:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 191 states have (on average 1.2617801047120418) internal successors, (241), 210 states have internal predecessors, (241), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 244 transitions. [2021-10-28 22:50:53,267 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 244 transitions. Word has length 36 [2021-10-28 22:50:53,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:53,268 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 244 transitions. [2021-10-28 22:50:53,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:53,268 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 244 transitions. [2021-10-28 22:50:53,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 22:50:53,269 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:53,269 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:53,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-10-28 22:50:53,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:53,492 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr40REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:53,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:53,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1852042456, now seen corresponding path program 1 times [2021-10-28 22:50:53,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:53,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797711958] [2021-10-28 22:50:53,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:53,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:53,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:53,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:53,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797711958] [2021-10-28 22:50:53,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797711958] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:53,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436373550] [2021-10-28 22:50:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:53,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:53,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:50:53,708 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:50:53,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 22:50:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:54,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 22:50:54,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:50:54,264 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 [2021-10-28 22:50:54,269 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 [2021-10-28 22:50:54,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 22:50:54,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-10-28 22:50:54,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 22:50:54,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-10-28 22:50:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:54,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436373550] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:54,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:50:54,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-10-28 22:50:54,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179636664] [2021-10-28 22:50:54,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 22:50:54,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:54,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 22:50:54,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-10-28 22:50:54,743 INFO L87 Difference]: Start difference. First operand 214 states and 244 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:55,908 INFO L93 Difference]: Finished difference Result 233 states and 256 transitions. [2021-10-28 22:50:55,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 22:50:55,909 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-10-28 22:50:55,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:55,910 INFO L225 Difference]: With dead ends: 233 [2021-10-28 22:50:55,910 INFO L226 Difference]: Without dead ends: 233 [2021-10-28 22:50:55,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=1459, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 22:50:55,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-10-28 22:50:55,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 216. [2021-10-28 22:50:55,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 193 states have (on average 1.2538860103626943) internal successors, (242), 212 states have internal predecessors, (242), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:55,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 245 transitions. [2021-10-28 22:50:55,917 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 245 transitions. Word has length 36 [2021-10-28 22:50:55,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:55,917 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 245 transitions. [2021-10-28 22:50:55,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:50:55,918 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 245 transitions. [2021-10-28 22:50:55,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 22:50:55,919 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:55,919 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:55,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 22:50:56,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 22:50:56,144 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:50:56,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:56,144 INFO L85 PathProgramCache]: Analyzing trace with hash 606496624, now seen corresponding path program 1 times [2021-10-28 22:50:56,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:56,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798132750] [2021-10-28 22:50:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:56,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:56,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:50:56,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:56,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798132750] [2021-10-28 22:50:56,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798132750] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:56,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477142328] [2021-10-28 22:50:56,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:56,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:56,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:50:56,448 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:50:56,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 22:50:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:56,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-28 22:50:56,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:50:56,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:50:57,059 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 22:50:57,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 22:50:57,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 22:50:57,274 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-28 22:50:57,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 20 [2021-10-28 22:50:57,339 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:50:57,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-28 22:50:57,465 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-10-28 22:50:57,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-10-28 22:50:57,580 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-10-28 22:50:57,581 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 34 [2021-10-28 22:50:57,638 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-10-28 22:50:57,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 50 [2021-10-28 22:50:57,660 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 [2021-10-28 22:50:57,932 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 92 treesize of output 84 [2021-10-28 22:50:58,204 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-28 22:50:58,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 40 [2021-10-28 22:51:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:01,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477142328] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:01,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:51:01,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 32 [2021-10-28 22:51:01,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430076806] [2021-10-28 22:51:01,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 22:51:01,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:01,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 22:51:01,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=907, Unknown=1, NotChecked=0, Total=1056 [2021-10-28 22:51:01,460 INFO L87 Difference]: Start difference. First operand 216 states and 245 transitions. Second operand has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:24,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:24,948 INFO L93 Difference]: Finished difference Result 285 states and 313 transitions. [2021-10-28 22:51:24,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-28 22:51:24,948 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-10-28 22:51:24,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:24,950 INFO L225 Difference]: With dead ends: 285 [2021-10-28 22:51:24,950 INFO L226 Difference]: Without dead ends: 285 [2021-10-28 22:51:24,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=586, Invalid=2948, Unknown=6, NotChecked=0, Total=3540 [2021-10-28 22:51:24,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-10-28 22:51:24,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 220. [2021-10-28 22:51:24,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 197 states have (on average 1.2588832487309645) internal successors, (248), 216 states have internal predecessors, (248), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:24,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 251 transitions. [2021-10-28 22:51:24,958 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 251 transitions. Word has length 36 [2021-10-28 22:51:24,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:24,958 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 251 transitions. [2021-10-28 22:51:24,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:24,959 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 251 transitions. [2021-10-28 22:51:24,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 22:51:24,960 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:24,960 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:25,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:25,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 22:51:25,180 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:51:25,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:25,180 INFO L85 PathProgramCache]: Analyzing trace with hash 606496625, now seen corresponding path program 1 times [2021-10-28 22:51:25,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:25,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594038841] [2021-10-28 22:51:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:25,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:25,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:25,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:25,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594038841] [2021-10-28 22:51:25,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594038841] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:25,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720367539] [2021-10-28 22:51:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:25,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:25,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:25,622 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:25,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 22:51:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:26,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-28 22:51:26,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:26,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:51:26,433 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 22:51:26,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 22:51:26,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:51:26,493 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 [2021-10-28 22:51:26,501 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 26 treesize of output 22 [2021-10-28 22:51:26,704 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-28 22:51:26,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 25 [2021-10-28 22:51:26,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:51:26,715 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 27 treesize of output 11 [2021-10-28 22:51:26,743 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:51:26,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 50 [2021-10-28 22:51:26,753 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 22:51:26,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 59 [2021-10-28 22:51:26,942 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-28 22:51:26,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 22:51:26,983 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-28 22:51:26,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-10-28 22:51:27,065 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-10-28 22:51:27,066 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 67 [2021-10-28 22:51:27,082 INFO L354 Elim1Store]: treesize reduction 63, result has 14.9 percent of original size [2021-10-28 22:51:27,082 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 2 case distinctions, treesize of input 74 treesize of output 61 [2021-10-28 22:51:27,168 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-10-28 22:51:27,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 70 [2021-10-28 22:51:27,190 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-10-28 22:51:27,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 104 [2021-10-28 22:51:27,923 INFO L354 Elim1Store]: treesize reduction 69, result has 10.4 percent of original size [2021-10-28 22:51:27,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 125 treesize of output 70 [2021-10-28 22:51:27,942 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-10-28 22:51:27,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 41 [2021-10-28 22:51:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:28,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720367539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:28,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:51:28,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 32 [2021-10-28 22:51:28,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059286424] [2021-10-28 22:51:28,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 22:51:28,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:28,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 22:51:28,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 22:51:28,057 INFO L87 Difference]: Start difference. First operand 220 states and 251 transitions. Second operand has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:30,348 INFO L93 Difference]: Finished difference Result 265 states and 292 transitions. [2021-10-28 22:51:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 22:51:30,349 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-10-28 22:51:30,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:30,350 INFO L225 Difference]: With dead ends: 265 [2021-10-28 22:51:30,350 INFO L226 Difference]: Without dead ends: 265 [2021-10-28 22:51:30,351 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=262, Invalid=1900, Unknown=0, NotChecked=0, Total=2162 [2021-10-28 22:51:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-10-28 22:51:30,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 219. [2021-10-28 22:51:30,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 196 states have (on average 1.2551020408163265) internal successors, (246), 215 states have internal predecessors, (246), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:30,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 249 transitions. [2021-10-28 22:51:30,358 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 249 transitions. Word has length 36 [2021-10-28 22:51:30,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:30,358 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 249 transitions. [2021-10-28 22:51:30,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:30,358 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 249 transitions. [2021-10-28 22:51:30,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 22:51:30,359 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:30,359 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:30,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:30,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:30,588 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr44ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:51:30,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:30,588 INFO L85 PathProgramCache]: Analyzing trace with hash -668642533, now seen corresponding path program 1 times [2021-10-28 22:51:30,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:30,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58362861] [2021-10-28 22:51:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:30,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 22:51:30,625 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 22:51:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 22:51:30,690 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 22:51:30,690 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 22:51:30,692 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr44ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 22:51:30,693 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 22:51:30,694 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 22:51:30,694 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 22:51:30,694 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 22:51:30,694 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 22:51:30,695 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 22:51:30,695 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-28 22:51:30,695 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 22:51:30,695 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 22:51:30,695 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-28 22:51:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-28 22:51:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-28 22:51:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-28 22:51:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-28 22:51:30,697 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-28 22:51:30,697 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-28 22:51:30,697 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-28 22:51:30,697 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-28 22:51:30,697 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-28 22:51:30,698 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-28 22:51:30,698 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-28 22:51:30,698 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-28 22:51:30,698 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-28 22:51:30,699 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-28 22:51:30,699 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-28 22:51:30,699 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-28 22:51:30,699 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION [2021-10-28 22:51:30,699 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-28 22:51:30,700 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-28 22:51:30,700 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-10-28 22:51:30,700 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-10-28 22:51:30,700 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION [2021-10-28 22:51:30,700 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION [2021-10-28 22:51:30,701 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION [2021-10-28 22:51:30,701 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION [2021-10-28 22:51:30,701 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION [2021-10-28 22:51:30,701 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 22:51:30,701 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37REQUIRES_VIOLATION [2021-10-28 22:51:30,701 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION [2021-10-28 22:51:30,702 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION [2021-10-28 22:51:30,702 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40REQUIRES_VIOLATION [2021-10-28 22:51:30,703 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:51:30,703 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:51:30,703 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:51:30,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-28 22:51:30,707 INFO L731 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:30,710 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 22:51:30,740 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-28 22:51:30,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 10:51:30 BoogieIcfgContainer [2021-10-28 22:51:30,766 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 22:51:30,769 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 22:51:30,769 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 22:51:30,769 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 22:51:30,770 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:49:54" (3/4) ... [2021-10-28 22:51:30,773 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 22:51:30,773 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 22:51:30,774 INFO L168 Benchmark]: Toolchain (without parser) took 97558.17 ms. Allocated memory was 94.4 MB in the beginning and 176.2 MB in the end (delta: 81.8 MB). Free memory was 53.0 MB in the beginning and 77.3 MB in the end (delta: -24.3 MB). Peak memory consumption was 57.4 MB. Max. memory is 16.1 GB. [2021-10-28 22:51:30,774 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 94.4 MB. Free memory was 70.4 MB in the beginning and 70.4 MB in the end (delta: 53.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:51:30,774 INFO L168 Benchmark]: CACSL2BoogieTranslator took 572.33 ms. Allocated memory is still 94.4 MB. Free memory was 52.8 MB in the beginning and 64.2 MB in the end (delta: -11.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 22:51:30,775 INFO L168 Benchmark]: Boogie Preprocessor took 145.00 ms. Allocated memory is still 94.4 MB. Free memory was 64.2 MB in the beginning and 61.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:51:30,775 INFO L168 Benchmark]: RCFGBuilder took 841.74 ms. Allocated memory is still 94.4 MB. Free memory was 61.2 MB in the beginning and 37.1 MB in the end (delta: 24.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-28 22:51:30,775 INFO L168 Benchmark]: TraceAbstraction took 95983.32 ms. Allocated memory was 94.4 MB in the beginning and 176.2 MB in the end (delta: 81.8 MB). Free memory was 36.6 MB in the beginning and 77.3 MB in the end (delta: -40.7 MB). Peak memory consumption was 42.6 MB. Max. memory is 16.1 GB. [2021-10-28 22:51:30,776 INFO L168 Benchmark]: Witness Printer took 4.63 ms. Allocated memory is still 176.2 MB. Free memory is still 77.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:51:30,779 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 94.4 MB. Free memory was 70.4 MB in the beginning and 70.4 MB in the end (delta: 53.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 572.33 ms. Allocated memory is still 94.4 MB. Free memory was 52.8 MB in the beginning and 64.2 MB in the end (delta: -11.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 145.00 ms. Allocated memory is still 94.4 MB. Free memory was 64.2 MB in the beginning and 61.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 841.74 ms. Allocated memory is still 94.4 MB. Free memory was 61.2 MB in the beginning and 37.1 MB in the end (delta: 24.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 95983.32 ms. Allocated memory was 94.4 MB in the beginning and 176.2 MB in the end (delta: 81.8 MB). Free memory was 36.6 MB in the beginning and 77.3 MB in the end (delta: -40.7 MB). Peak memory consumption was 42.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.63 ms. Allocated memory is still 176.2 MB. Free memory is still 77.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 996]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 996. Possible FailurePath: [L999] SLL* head = malloc(sizeof(SLL)); [L1000] head->next = ((void*)0) VAL [head={-2:0}] [L1001] head->data = 0 VAL [head={-2:0}] [L1003] SLL* x = head; VAL [head={-2:0}, x={-2:0}] [L1006] COND FALSE !(__VERIFIER_nondet_int()) [L1016] COND FALSE !(__VERIFIER_nondet_int()) [L1025] x = head VAL [head={-2:0}, x={-2:0}] [L1026] x->next VAL [head={-2:0}, x={-2:0}, x->next={0:0}] [L1026] COND FALSE !(x->next) [L1033] EXPR x->next VAL [head={-2:0}, x={-2:0}, x->next={0:0}] [L1033] SLL* y = x->next; [L1034] x->next = malloc(sizeof(SLL)) VAL [head={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-2:0}, y={0:0}] [L1035] x->data = 1 VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1036] x->next = y VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1040] x = head VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1043] EXPR x->data VAL [head={-2:0}, x={-2:0}, x->data=1, y={0:0}] [L1043] COND FALSE !(x->data != 1) [L1049] EXPR x->next VAL [head={-2:0}, x={-2:0}, x->next={0:0}, y={0:0}] [L1049] x = x->next [L1050] COND FALSE !(\read(*x)) VAL [head={-2:0}, x={0:0}, y={0:0}] [L1058] x = head VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1059] COND TRUE x != ((void*)0) [L1061] head = x VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1062] EXPR x->next VAL [head={-2:0}, x={-2:0}, x->next={0:0}, y={0:0}] [L1062] x = x->next [L1063] free(head) VAL [head={-2:0}, x={0:0}, y={0:0}] [L1063] free(head) VAL [head={-2:0}, x={0:0}, y={0:0}] [L1063] free(head) [L1059] COND FALSE !(x != ((void*)0)) VAL [head={-2:0}, x={0:0}, y={0:0}] [L1066] return 0; VAL [\result=0, head={-2:0}, x={0:0}, y={0:0}] - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1018]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1018]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1026]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1026]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1036]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1036]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1053]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1054]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1054]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 107 locations, 45 error locations. Started 1 CEGAR loops. OverallTime: 95.8s, OverallIterations: 31, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 63.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1689 SDtfs, 6143 SDslu, 8931 SDs, 0 SdLazy, 23021 SolverSat, 1741 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 28.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1078 GetRequests, 363 SyntacticMatches, 21 SemanticMatches, 694 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5875 ImplicationChecksByTransitivity, 41.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=220occurred in iteration=29, InterpolantAutomatonStates: 479, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 30 MinimizatonAttempts, 1056 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 22.8s InterpolantComputationTime, 1247 NumberOfCodeBlocks, 1247 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 1166 ConstructedInterpolants, 103 QuantifiedInterpolants, 18726 SizeOfPredicates, 198 NumberOfNonLiveVariables, 2737 ConjunctsInSsa, 548 ConjunctsInUnsatCore, 44 InterpolantComputations, 16 PerfectInterpolantSequences, 22/134 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-28 22:51:30,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 22:51:33,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 22:51:33,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 22:51:33,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 22:51:33,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 22:51:33,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 22:51:33,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 22:51:33,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 22:51:33,272 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 22:51:33,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 22:51:33,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 22:51:33,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 22:51:33,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 22:51:33,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 22:51:33,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 22:51:33,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 22:51:33,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 22:51:33,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 22:51:33,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 22:51:33,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 22:51:33,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 22:51:33,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 22:51:33,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 22:51:33,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 22:51:33,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 22:51:33,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 22:51:33,332 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 22:51:33,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 22:51:33,335 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 22:51:33,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 22:51:33,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 22:51:33,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 22:51:33,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 22:51:33,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 22:51:33,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 22:51:33,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 22:51:33,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 22:51:33,346 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 22:51:33,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 22:51:33,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 22:51:33,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 22:51:33,354 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-28 22:51:33,402 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 22:51:33,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 22:51:33,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 22:51:33,403 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 22:51:33,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 22:51:33,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 22:51:33,406 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 22:51:33,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 22:51:33,406 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 22:51:33,407 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 22:51:33,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 22:51:33,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 22:51:33,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 22:51:33,408 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 22:51:33,409 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 22:51:33,409 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 22:51:33,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 22:51:33,410 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 22:51:33,410 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-28 22:51:33,410 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-28 22:51:33,410 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 22:51:33,411 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 22:51:33,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 22:51:33,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 22:51:33,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 22:51:33,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:51:33,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 22:51:33,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 22:51:33,413 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-28 22:51:33,413 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-28 22:51:33,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 22:51:33,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-28 22:51:33,414 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d [2021-10-28 22:51:33,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 22:51:33,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 22:51:33,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 22:51:33,860 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 22:51:33,860 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 22:51:33,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2021-10-28 22:51:33,944 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/data/204578f4b/dd0695e8e73f4885ae5cf861ef2be893/FLAG1556628a1 [2021-10-28 22:51:34,457 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 22:51:34,459 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2021-10-28 22:51:34,477 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/data/204578f4b/dd0695e8e73f4885ae5cf861ef2be893/FLAG1556628a1 [2021-10-28 22:51:34,783 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/data/204578f4b/dd0695e8e73f4885ae5cf861ef2be893 [2021-10-28 22:51:34,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 22:51:34,788 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 22:51:34,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 22:51:34,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 22:51:34,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 22:51:34,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:51:34" (1/1) ... [2021-10-28 22:51:34,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65880458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:34, skipping insertion in model container [2021-10-28 22:51:34,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:51:34" (1/1) ... [2021-10-28 22:51:34,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 22:51:34,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 22:51:35,288 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i[22605,22618] [2021-10-28 22:51:35,301 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:51:35,323 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 22:51:35,391 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i[22605,22618] [2021-10-28 22:51:35,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:51:35,436 INFO L208 MainTranslator]: Completed translation [2021-10-28 22:51:35,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:35 WrapperNode [2021-10-28 22:51:35,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 22:51:35,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 22:51:35,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 22:51:35,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 22:51:35,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:35" (1/1) ... [2021-10-28 22:51:35,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:35" (1/1) ... [2021-10-28 22:51:35,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:35" (1/1) ... [2021-10-28 22:51:35,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:35" (1/1) ... [2021-10-28 22:51:35,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:35" (1/1) ... [2021-10-28 22:51:35,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:35" (1/1) ... [2021-10-28 22:51:35,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:35" (1/1) ... [2021-10-28 22:51:35,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 22:51:35,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 22:51:35,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 22:51:35,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 22:51:35,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:35" (1/1) ... [2021-10-28 22:51:35,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:51:35,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:35,555 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 22:51:35,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 22:51:35,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 22:51:35,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 22:51:35,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 22:51:35,600 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 22:51:35,600 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 22:51:35,601 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 22:51:35,601 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 22:51:35,601 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 22:51:35,601 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 22:51:35,602 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 22:51:35,602 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 22:51:35,602 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 22:51:35,602 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 22:51:35,602 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 22:51:35,603 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 22:51:35,603 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 22:51:35,603 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 22:51:35,603 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 22:51:35,603 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 22:51:35,604 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 22:51:35,604 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 22:51:35,604 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 22:51:35,604 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 22:51:35,604 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 22:51:35,604 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 22:51:35,605 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 22:51:35,605 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 22:51:35,605 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 22:51:35,605 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 22:51:35,605 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 22:51:35,606 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 22:51:35,606 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 22:51:35,606 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 22:51:35,606 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 22:51:35,606 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 22:51:35,606 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 22:51:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 22:51:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 22:51:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 22:51:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 22:51:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 22:51:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 22:51:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 22:51:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 22:51:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 22:51:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 22:51:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 22:51:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 22:51:35,609 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 22:51:35,609 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 22:51:35,609 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 22:51:35,609 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 22:51:35,609 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 22:51:35,610 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 22:51:35,610 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 22:51:35,610 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 22:51:35,610 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 22:51:35,610 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 22:51:35,610 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 22:51:35,611 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-28 22:51:35,611 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 22:51:35,611 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 22:51:35,611 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 22:51:35,611 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 22:51:35,611 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 22:51:35,612 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 22:51:35,612 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 22:51:35,612 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 22:51:35,612 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 22:51:35,612 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 22:51:35,612 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 22:51:35,613 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 22:51:35,613 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 22:51:35,613 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 22:51:35,613 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 22:51:35,613 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 22:51:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 22:51:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 22:51:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 22:51:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 22:51:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 22:51:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 22:51:35,615 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 22:51:35,615 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 22:51:35,615 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 22:51:35,615 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 22:51:35,615 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 22:51:35,615 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 22:51:35,616 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 22:51:35,616 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 22:51:35,616 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 22:51:35,616 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 22:51:35,616 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 22:51:35,616 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 22:51:35,617 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 22:51:35,617 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 22:51:35,617 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 22:51:35,617 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 22:51:35,617 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 22:51:35,617 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 22:51:35,618 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 22:51:35,618 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 22:51:35,618 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 22:51:35,618 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 22:51:35,618 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 22:51:35,618 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 22:51:35,619 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 22:51:35,619 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 22:51:35,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 22:51:35,619 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 22:51:35,619 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 22:51:35,619 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 22:51:35,620 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 22:51:35,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 22:51:35,620 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 22:51:35,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 22:51:35,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 22:51:35,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-28 22:51:35,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 22:51:35,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-28 22:51:35,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 22:51:35,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 22:51:35,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-28 22:51:35,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 22:51:35,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 22:51:35,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-28 22:51:35,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-28 22:51:36,608 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 22:51:36,609 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-28 22:51:36,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:51:36 BoogieIcfgContainer [2021-10-28 22:51:36,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 22:51:36,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 22:51:36,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 22:51:36,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 22:51:36,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:51:34" (1/3) ... [2021-10-28 22:51:36,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50530f6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:51:36, skipping insertion in model container [2021-10-28 22:51:36,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:35" (2/3) ... [2021-10-28 22:51:36,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50530f6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:51:36, skipping insertion in model container [2021-10-28 22:51:36,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:51:36" (3/3) ... [2021-10-28 22:51:36,646 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-simple-white-blue-1.i [2021-10-28 22:51:36,652 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 22:51:36,652 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 45 error locations. [2021-10-28 22:51:36,709 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 22:51:36,717 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 22:51:36,718 INFO L340 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2021-10-28 22:51:36,739 INFO L276 IsEmpty]: Start isEmpty. Operand has 102 states, 52 states have (on average 2.173076923076923) internal successors, (113), 97 states have internal predecessors, (113), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:51:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-28 22:51:36,750 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:36,751 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:36,752 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:51:36,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:36,759 INFO L85 PathProgramCache]: Analyzing trace with hash 891998390, now seen corresponding path program 1 times [2021-10-28 22:51:36,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:51:36,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713340059] [2021-10-28 22:51:36,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:36,773 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:51:36,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:51:36,776 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:51:36,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-28 22:51:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:36,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 22:51:36,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:37,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:51:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:37,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:51:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:37,102 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:51:37,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713340059] [2021-10-28 22:51:37,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713340059] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:37,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:37,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-28 22:51:37,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622982465] [2021-10-28 22:51:37,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 22:51:37,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:51:37,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 22:51:37,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 22:51:37,138 INFO L87 Difference]: Start difference. First operand has 102 states, 52 states have (on average 2.173076923076923) internal successors, (113), 97 states have internal predecessors, (113), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:37,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:37,451 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2021-10-28 22:51:37,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 22:51:37,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-28 22:51:37,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:37,462 INFO L225 Difference]: With dead ends: 129 [2021-10-28 22:51:37,462 INFO L226 Difference]: Without dead ends: 125 [2021-10-28 22:51:37,464 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 22:51:37,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-28 22:51:37,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2021-10-28 22:51:37,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 50 states have (on average 1.98) internal successors, (99), 92 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:37,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2021-10-28 22:51:37,505 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 7 [2021-10-28 22:51:37,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:37,506 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2021-10-28 22:51:37,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:37,506 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2021-10-28 22:51:37,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-28 22:51:37,507 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:37,507 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:37,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:37,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:51:37,720 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:51:37,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:37,720 INFO L85 PathProgramCache]: Analyzing trace with hash 891998391, now seen corresponding path program 1 times [2021-10-28 22:51:37,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:51:37,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301143486] [2021-10-28 22:51:37,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:37,722 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:51:37,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:51:37,723 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:51:37,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-28 22:51:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:37,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 22:51:37,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:37,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:51:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:37,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:51:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:38,004 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:51:38,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301143486] [2021-10-28 22:51:38,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301143486] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:38,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:38,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-28 22:51:38,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401598619] [2021-10-28 22:51:38,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:51:38,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:51:38,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:51:38,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:51:38,008 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:38,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:38,392 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2021-10-28 22:51:38,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 22:51:38,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-28 22:51:38,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:38,396 INFO L225 Difference]: With dead ends: 123 [2021-10-28 22:51:38,396 INFO L226 Difference]: Without dead ends: 123 [2021-10-28 22:51:38,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:51:38,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-28 22:51:38,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2021-10-28 22:51:38,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 50 states have (on average 1.94) internal successors, (97), 90 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:38,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2021-10-28 22:51:38,407 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 7 [2021-10-28 22:51:38,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:38,407 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2021-10-28 22:51:38,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:38,407 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2021-10-28 22:51:38,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 22:51:38,408 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:38,408 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:38,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:38,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:51:38,619 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:51:38,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:38,620 INFO L85 PathProgramCache]: Analyzing trace with hash 222948282, now seen corresponding path program 1 times [2021-10-28 22:51:38,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:51:38,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98523099] [2021-10-28 22:51:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:38,622 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:51:38,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:51:38,623 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:51:38,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-28 22:51:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:38,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 22:51:38,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:38,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:51:38,872 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-28 22:51:38,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-10-28 22:51:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:38,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:51:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:39,045 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:51:39,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98523099] [2021-10-28 22:51:39,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98523099] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:39,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:39,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-28 22:51:39,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998083092] [2021-10-28 22:51:39,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:51:39,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:51:39,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:51:39,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:51:39,052 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:39,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:39,430 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2021-10-28 22:51:39,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:51:39,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 22:51:39,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:39,432 INFO L225 Difference]: With dead ends: 97 [2021-10-28 22:51:39,432 INFO L226 Difference]: Without dead ends: 97 [2021-10-28 22:51:39,432 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:51:39,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-28 22:51:39,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2021-10-28 22:51:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 58 states have (on average 1.6896551724137931) internal successors, (98), 85 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:39,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2021-10-28 22:51:39,441 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 11 [2021-10-28 22:51:39,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:39,442 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2021-10-28 22:51:39,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:39,442 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2021-10-28 22:51:39,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 22:51:39,443 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:39,443 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:39,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:39,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:51:39,655 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:51:39,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:39,655 INFO L85 PathProgramCache]: Analyzing trace with hash 222948283, now seen corresponding path program 1 times [2021-10-28 22:51:39,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:51:39,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771490181] [2021-10-28 22:51:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:39,656 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:51:39,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:51:39,657 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:51:39,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-28 22:51:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:39,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 22:51:39,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:39,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:51:39,941 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 22:51:39,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-28 22:51:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:39,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:51:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:40,285 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:51:40,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771490181] [2021-10-28 22:51:40,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771490181] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:40,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:40,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-10-28 22:51:40,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200601075] [2021-10-28 22:51:40,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:51:40,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:51:40,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:51:40,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:51:40,288 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:41,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:41,190 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2021-10-28 22:51:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:51:41,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 22:51:41,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:41,192 INFO L225 Difference]: With dead ends: 113 [2021-10-28 22:51:41,192 INFO L226 Difference]: Without dead ends: 113 [2021-10-28 22:51:41,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:51:41,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-28 22:51:41,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2021-10-28 22:51:41,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 91 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:41,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2021-10-28 22:51:41,200 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 11 [2021-10-28 22:51:41,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:41,200 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2021-10-28 22:51:41,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:41,200 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2021-10-28 22:51:41,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 22:51:41,201 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:41,201 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:41,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:41,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:51:41,401 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:51:41,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:41,402 INFO L85 PathProgramCache]: Analyzing trace with hash 983785532, now seen corresponding path program 1 times [2021-10-28 22:51:41,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:51:41,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502145259] [2021-10-28 22:51:41,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:41,403 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:51:41,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:51:41,403 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:51:41,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-28 22:51:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:41,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 22:51:41,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:41,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:51:41,600 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 20 treesize of output 16 [2021-10-28 22:51:41,622 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 21 treesize of output 13 [2021-10-28 22:51:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:41,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:51:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:41,716 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:51:41,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502145259] [2021-10-28 22:51:41,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502145259] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:41,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:41,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-28 22:51:41,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568300080] [2021-10-28 22:51:41,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:51:41,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:51:41,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:51:41,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:51:41,719 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:42,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:42,238 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2021-10-28 22:51:42,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:51:42,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-28 22:51:42,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:42,240 INFO L225 Difference]: With dead ends: 95 [2021-10-28 22:51:42,240 INFO L226 Difference]: Without dead ends: 95 [2021-10-28 22:51:42,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:51:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-28 22:51:42,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-10-28 22:51:42,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.4714285714285715) internal successors, (103), 90 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:42,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2021-10-28 22:51:42,248 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 15 [2021-10-28 22:51:42,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:42,248 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2021-10-28 22:51:42,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:42,249 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2021-10-28 22:51:42,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 22:51:42,250 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:42,250 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:42,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:42,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:51:42,461 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:51:42,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:42,462 INFO L85 PathProgramCache]: Analyzing trace with hash 983785533, now seen corresponding path program 1 times [2021-10-28 22:51:42,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:51:42,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709814400] [2021-10-28 22:51:42,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:42,462 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:51:42,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:51:42,463 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:51:42,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-28 22:51:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:42,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 22:51:42,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:42,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:51:42,671 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 [2021-10-28 22:51:42,678 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 17 treesize of output 13 [2021-10-28 22:51:42,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-10-28 22:51:42,753 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 20 treesize of output 12 [2021-10-28 22:51:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:42,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:51:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:43,121 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:51:43,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709814400] [2021-10-28 22:51:43,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709814400] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:43,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:43,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-28 22:51:43,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386444426] [2021-10-28 22:51:43,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 22:51:43,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:51:43,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 22:51:43,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:51:43,124 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:44,405 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2021-10-28 22:51:44,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 22:51:44,406 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-28 22:51:44,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:44,407 INFO L225 Difference]: With dead ends: 96 [2021-10-28 22:51:44,407 INFO L226 Difference]: Without dead ends: 96 [2021-10-28 22:51:44,408 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-10-28 22:51:44,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-28 22:51:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2021-10-28 22:51:44,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 85 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:44,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2021-10-28 22:51:44,416 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 15 [2021-10-28 22:51:44,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:44,417 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2021-10-28 22:51:44,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:44,417 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2021-10-28 22:51:44,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 22:51:44,418 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:44,418 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:44,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:44,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:51:44,630 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:51:44,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:44,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1308029040, now seen corresponding path program 1 times [2021-10-28 22:51:44,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:51:44,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402966987] [2021-10-28 22:51:44,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:44,631 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:51:44,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:51:44,632 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:51:44,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-28 22:51:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:44,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 22:51:44,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:44,845 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 [2021-10-28 22:51:44,854 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 [2021-10-28 22:51:44,894 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-28 22:51:44,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-10-28 22:51:44,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:51:44,904 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 27 treesize of output 11 [2021-10-28 22:51:44,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-28 22:51:44,970 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 18 treesize of output 10 [2021-10-28 22:51:44,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:44,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:51:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:45,104 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:51:45,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402966987] [2021-10-28 22:51:45,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402966987] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:45,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:45,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-28 22:51:45,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667488855] [2021-10-28 22:51:45,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:51:45,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:51:45,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:51:45,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:51:45,107 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:45,484 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2021-10-28 22:51:45,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:51:45,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-28 22:51:45,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:45,486 INFO L225 Difference]: With dead ends: 98 [2021-10-28 22:51:45,486 INFO L226 Difference]: Without dead ends: 98 [2021-10-28 22:51:45,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:51:45,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-28 22:51:45,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-10-28 22:51:45,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 89 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:45,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2021-10-28 22:51:45,492 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 17 [2021-10-28 22:51:45,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:45,492 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2021-10-28 22:51:45,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:45,493 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2021-10-28 22:51:45,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 22:51:45,494 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:45,494 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:45,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:45,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:51:45,706 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:51:45,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:45,706 INFO L85 PathProgramCache]: Analyzing trace with hash 158378837, now seen corresponding path program 1 times [2021-10-28 22:51:45,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:51:45,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133753869] [2021-10-28 22:51:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:45,707 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:51:45,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:51:45,708 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:51:45,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-28 22:51:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:45,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 22:51:45,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:45,963 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 13 treesize of output 9 [2021-10-28 22:51:45,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:51:45,996 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 25 treesize of output 13 [2021-10-28 22:51:46,048 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 [2021-10-28 22:51:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:46,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:51:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:46,177 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:51:46,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133753869] [2021-10-28 22:51:46,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133753869] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:46,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:46,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2021-10-28 22:51:46,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447640238] [2021-10-28 22:51:46,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:51:46,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:51:46,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:51:46,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:51:46,179 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:46,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:46,655 INFO L93 Difference]: Finished difference Result 123 states and 137 transitions. [2021-10-28 22:51:46,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:51:46,656 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-28 22:51:46,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:46,657 INFO L225 Difference]: With dead ends: 123 [2021-10-28 22:51:46,657 INFO L226 Difference]: Without dead ends: 123 [2021-10-28 22:51:46,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:51:46,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-28 22:51:46,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2021-10-28 22:51:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 92 states have internal predecessors, (106), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:46,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2021-10-28 22:51:46,663 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 20 [2021-10-28 22:51:46,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:46,663 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2021-10-28 22:51:46,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:46,663 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2021-10-28 22:51:46,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 22:51:46,665 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:46,665 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:46,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:46,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:51:46,866 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:51:46,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:46,866 INFO L85 PathProgramCache]: Analyzing trace with hash 613145829, now seen corresponding path program 1 times [2021-10-28 22:51:46,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:51:46,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161940678] [2021-10-28 22:51:46,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:46,867 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:51:46,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:51:46,868 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:51:46,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-28 22:51:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:47,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 22:51:47,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:47,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:51:47,147 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-28 22:51:47,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2021-10-28 22:51:47,206 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 31 treesize of output 27 [2021-10-28 22:51:47,380 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 43 treesize of output 35 [2021-10-28 22:51:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:47,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:51:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:47,606 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:51:47,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161940678] [2021-10-28 22:51:47,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161940678] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:47,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:47,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2021-10-28 22:51:47,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840281859] [2021-10-28 22:51:47,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 22:51:47,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:51:47,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 22:51:47,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:51:47,608 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:48,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:48,565 INFO L93 Difference]: Finished difference Result 127 states and 140 transitions. [2021-10-28 22:51:48,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:51:48,565 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-28 22:51:48,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:48,567 INFO L225 Difference]: With dead ends: 127 [2021-10-28 22:51:48,567 INFO L226 Difference]: Without dead ends: 127 [2021-10-28 22:51:48,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 13 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-10-28 22:51:48,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-28 22:51:48,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2021-10-28 22:51:48,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 96 states have internal predecessors, (112), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:48,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 115 transitions. [2021-10-28 22:51:48,574 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 115 transitions. Word has length 21 [2021-10-28 22:51:48,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:48,574 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 115 transitions. [2021-10-28 22:51:48,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:48,575 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 115 transitions. [2021-10-28 22:51:48,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 22:51:48,576 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:48,576 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:48,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:48,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:51:48,784 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:51:48,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:48,784 INFO L85 PathProgramCache]: Analyzing trace with hash 613145830, now seen corresponding path program 1 times [2021-10-28 22:51:48,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:51:48,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332271034] [2021-10-28 22:51:48,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:48,785 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:51:48,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:51:48,786 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:51:48,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-28 22:51:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:48,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 22:51:48,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:49,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:51:49,072 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 22:51:49,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-28 22:51:49,118 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 [2021-10-28 22:51:49,127 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 17 treesize of output 13 [2021-10-28 22:51:49,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-10-28 22:51:49,247 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 25 treesize of output 17 [2021-10-28 22:51:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:49,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:51:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:50,016 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:51:50,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332271034] [2021-10-28 22:51:50,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332271034] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:50,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:50,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-10-28 22:51:50,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797545801] [2021-10-28 22:51:50,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 22:51:50,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:51:50,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 22:51:50,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-28 22:51:50,018 INFO L87 Difference]: Start difference. First operand 100 states and 115 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:51,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:51,744 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2021-10-28 22:51:51,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 22:51:51,744 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-28 22:51:51,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:51,746 INFO L225 Difference]: With dead ends: 149 [2021-10-28 22:51:51,746 INFO L226 Difference]: Without dead ends: 149 [2021-10-28 22:51:51,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2021-10-28 22:51:51,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-28 22:51:51,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 102. [2021-10-28 22:51:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 81 states have (on average 1.4074074074074074) internal successors, (114), 98 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:51,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2021-10-28 22:51:51,751 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 21 [2021-10-28 22:51:51,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:51,752 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2021-10-28 22:51:51,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:51,752 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2021-10-28 22:51:51,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 22:51:51,753 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:51,753 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:51,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:51,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:51:51,964 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr36ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:51:51,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:51,964 INFO L85 PathProgramCache]: Analyzing trace with hash 822626090, now seen corresponding path program 1 times [2021-10-28 22:51:51,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:51:51,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1223895261] [2021-10-28 22:51:51,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:51,965 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:51:51,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:51:51,966 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:51:51,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-28 22:51:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:52,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 22:51:52,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:52,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:51:52,247 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 13 treesize of output 9 [2021-10-28 22:51:52,313 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:51:52,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-10-28 22:51:52,355 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 23 treesize of output 22 [2021-10-28 22:51:52,424 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 60 treesize of output 56 [2021-10-28 22:51:52,477 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-28 22:51:52,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 48 [2021-10-28 22:51:52,486 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 42 treesize of output 38 [2021-10-28 22:51:52,655 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 49 treesize of output 37 [2021-10-28 22:51:52,659 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 34 treesize of output 26 [2021-10-28 22:51:52,844 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-28 22:51:52,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2021-10-28 22:51:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:52,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:52:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:52:19,070 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:52:19,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1223895261] [2021-10-28 22:52:19,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1223895261] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:52:19,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:52:19,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 19 [2021-10-28 22:52:19,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271371794] [2021-10-28 22:52:19,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 22:52:19,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:52:19,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 22:52:19,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=284, Unknown=11, NotChecked=0, Total=342 [2021-10-28 22:52:19,073 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:24,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:52:24,096 INFO L93 Difference]: Finished difference Result 167 states and 185 transitions. [2021-10-28 22:52:24,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 22:52:24,097 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-28 22:52:24,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:52:24,098 INFO L225 Difference]: With dead ends: 167 [2021-10-28 22:52:24,098 INFO L226 Difference]: Without dead ends: 167 [2021-10-28 22:52:24,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=128, Invalid=672, Unknown=12, NotChecked=0, Total=812 [2021-10-28 22:52:24,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-10-28 22:52:24,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 113. [2021-10-28 22:52:24,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 92 states have (on average 1.3695652173913044) internal successors, (126), 109 states have internal predecessors, (126), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:24,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2021-10-28 22:52:24,113 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 23 [2021-10-28 22:52:24,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:52:24,114 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2021-10-28 22:52:24,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:24,114 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2021-10-28 22:52:24,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 22:52:24,115 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:52:24,115 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:52:24,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-28 22:52:24,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:52:24,328 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr44ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:52:24,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:52:24,329 INFO L85 PathProgramCache]: Analyzing trace with hash -269223688, now seen corresponding path program 1 times [2021-10-28 22:52:24,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:52:24,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038221868] [2021-10-28 22:52:24,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:52:24,329 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:52:24,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:52:24,330 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:52:24,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-28 22:52:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:52:24,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 22:52:24,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:52:24,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 22:52:24,664 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 16 treesize of output 8 [2021-10-28 22:52:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:52:24,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:52:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:52:24,782 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:52:24,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038221868] [2021-10-28 22:52:24,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038221868] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:52:24,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:52:24,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-10-28 22:52:24,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393436080] [2021-10-28 22:52:24,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:52:24,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:52:24,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:52:24,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:52:24,784 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:25,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:52:25,302 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2021-10-28 22:52:25,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:52:25,302 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-10-28 22:52:25,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:52:25,303 INFO L225 Difference]: With dead ends: 153 [2021-10-28 22:52:25,303 INFO L226 Difference]: Without dead ends: 153 [2021-10-28 22:52:25,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-28 22:52:25,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-28 22:52:25,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 113. [2021-10-28 22:52:25,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 92 states have (on average 1.3369565217391304) internal successors, (123), 109 states have internal predecessors, (123), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 126 transitions. [2021-10-28 22:52:25,308 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 126 transitions. Word has length 24 [2021-10-28 22:52:25,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:52:25,309 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 126 transitions. [2021-10-28 22:52:25,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:25,315 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 126 transitions. [2021-10-28 22:52:25,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 22:52:25,316 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:52:25,317 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:52:25,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-28 22:52:25,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:52:25,524 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:52:25,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:52:25,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1777986568, now seen corresponding path program 1 times [2021-10-28 22:52:25,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:52:25,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934908154] [2021-10-28 22:52:25,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:52:25,525 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:52:25,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:52:25,526 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:52:25,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-28 22:52:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:52:25,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 22:52:25,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:52:25,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:52:25,890 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-28 22:52:25,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-10-28 22:52:25,972 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 24 treesize of output 20 [2021-10-28 22:52:26,193 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-28 22:52:26,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 26 [2021-10-28 22:52:26,266 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:52:26,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 33 [2021-10-28 22:52:26,542 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:52:26,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 43 [2021-10-28 22:52:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:52:26,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:52:33,696 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~x~0.offset (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem6.base| (store (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem6.base|) (bvadd (_ bv4 32) main_~x~0.offset) v_DerPreprocessor_5) main_~x~0.offset (_ bv0 32))) c_main_~head~0.base) c_main_~head~0.offset))))))))))) (_ bv1 1)))) is different from false [2021-10-28 22:52:35,723 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (v_main_~x~0.offset_84 (_ BitVec 32))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_main_~x~0.base) c_main_~x~0.offset))) (store |c_#memory_$Pointer$.base| .cse0 (store (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) v_main_~x~0.offset_84) v_DerPreprocessor_5) v_main_~x~0.offset_84 (_ bv0 32)))) c_main_~head~0.base) c_main_~head~0.offset))))))))))))))) is different from false [2021-10-28 22:52:35,745 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 582 treesize of output 574 [2021-10-28 22:52:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:52:55,080 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:52:55,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934908154] [2021-10-28 22:52:55,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934908154] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 22:52:55,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:52:55,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-10-28 22:52:55,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323062419] [2021-10-28 22:52:55,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 22:52:55,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:52:55,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 22:52:55,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=8, NotChecked=78, Total=506 [2021-10-28 22:52:55,082 INFO L87 Difference]: Start difference. First operand 113 states and 126 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:53:23,688 WARN L207 SmtUtils]: Spent 19.19 s on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2021-10-28 22:53:40,662 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((main_~x~0.offset (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_main_~x~0.base (store (store (select |c_#memory_$Pointer$.base| c_main_~x~0.base) (bvadd (_ bv4 32) main_~x~0.offset) v_DerPreprocessor_5) main_~x~0.offset (_ bv0 32))) c_main_~head~0.base) c_main_~head~0.offset))))))))))) (_ bv1 1)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_main_~x~0.base (store (select |c_#memory_$Pointer$.base| c_main_~x~0.base) c_main_~x~0.offset (_ bv0 32))) c_main_~head~0.base) c_main_~head~0.offset))))))))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_main_~head~0.base))))) (_ bv1 1)))) is different from false [2021-10-28 22:54:11,954 WARN L207 SmtUtils]: Spent 28.10 s on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-10-28 22:54:12,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:12,395 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2021-10-28 22:54:12,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 22:54:12,395 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-10-28 22:54:12,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:12,397 INFO L225 Difference]: With dead ends: 175 [2021-10-28 22:54:12,397 INFO L226 Difference]: Without dead ends: 175 [2021-10-28 22:54:12,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 92.3s TimeCoverageRelationStatistics Valid=362, Invalid=1195, Unknown=15, NotChecked=234, Total=1806 [2021-10-28 22:54:12,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-10-28 22:54:12,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 127. [2021-10-28 22:54:12,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 106 states have (on average 1.3396226415094339) internal successors, (142), 123 states have internal predecessors, (142), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:54:12,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 145 transitions. [2021-10-28 22:54:12,404 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 145 transitions. Word has length 24 [2021-10-28 22:54:12,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:12,404 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 145 transitions. [2021-10-28 22:54:12,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:54:12,405 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 145 transitions. [2021-10-28 22:54:12,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 22:54:12,406 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:12,406 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:12,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-28 22:54:12,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:54:12,619 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:54:12,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:12,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1777986567, now seen corresponding path program 1 times [2021-10-28 22:54:12,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:54:12,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946290173] [2021-10-28 22:54:12,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:12,621 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:54:12,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:54:12,622 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:54:12,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-28 22:54:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:12,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 22:54:12,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:54:12,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:54:13,097 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:54:13,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-10-28 22:54:13,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:54:13,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 22:54:13,206 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 [2021-10-28 22:54:13,482 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-28 22:54:13,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 20 [2021-10-28 22:54:13,497 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 27 treesize of output 11 [2021-10-28 22:54:13,566 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:54:13,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-10-28 22:54:13,589 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 22:54:13,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-28 22:54:13,981 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:54:13,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 40 [2021-10-28 22:54:13,990 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:54:13,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-10-28 22:54:14,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:54:14,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:55:08,838 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 638 treesize of output 606 [2021-10-28 22:55:09,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:55:09,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:55:09,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 22:55:09,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:55:09,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:55:09,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 22:55:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:11,866 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:55:11,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946290173] [2021-10-28 22:55:11,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946290173] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 22:55:11,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:11,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-10-28 22:55:11,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96584062] [2021-10-28 22:55:11,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 22:55:11,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:55:11,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 22:55:11,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=430, Unknown=12, NotChecked=0, Total=506 [2021-10-28 22:55:11,869 INFO L87 Difference]: Start difference. First operand 127 states and 145 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:56,109 WARN L207 SmtUtils]: Spent 36.76 s on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-10-28 22:56:52,010 WARN L207 SmtUtils]: Spent 39.51 s on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-10-28 22:56:53,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:53,651 INFO L93 Difference]: Finished difference Result 185 states and 207 transitions. [2021-10-28 22:56:53,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 22:56:53,651 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-10-28 22:56:53,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:53,653 INFO L225 Difference]: With dead ends: 185 [2021-10-28 22:56:53,653 INFO L226 Difference]: Without dead ends: 185 [2021-10-28 22:56:53,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 138.8s TimeCoverageRelationStatistics Valid=310, Invalid=1484, Unknown=12, NotChecked=0, Total=1806 [2021-10-28 22:56:53,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-10-28 22:56:53,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 126. [2021-10-28 22:56:53,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 105 states have (on average 1.3333333333333333) internal successors, (140), 122 states have internal predecessors, (140), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:53,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 143 transitions. [2021-10-28 22:56:53,658 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 143 transitions. Word has length 24 [2021-10-28 22:56:53,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:53,659 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 143 transitions. [2021-10-28 22:56:53,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:53,659 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 143 transitions. [2021-10-28 22:56:53,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 22:56:53,660 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:53,660 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:53,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-28 22:56:53,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:56:53,873 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:56:53,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:53,873 INFO L85 PathProgramCache]: Analyzing trace with hash 220059809, now seen corresponding path program 1 times [2021-10-28 22:56:53,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:56:53,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477111935] [2021-10-28 22:56:53,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:53,874 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:56:53,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:56:53,875 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:56:53,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-28 22:56:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:54,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 22:56:54,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:54,312 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 13 treesize of output 9 [2021-10-28 22:56:54,367 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-28 22:56:54,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 22:56:54,415 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 19 treesize of output 7 [2021-10-28 22:56:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:54,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:56:54,556 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 200 treesize of output 188 [2021-10-28 22:56:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:54,741 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:56:54,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477111935] [2021-10-28 22:56:54,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477111935] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:56:54,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:56:54,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-10-28 22:56:54,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555185974] [2021-10-28 22:56:54,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:56:54,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:56:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:56:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:56:54,742 INFO L87 Difference]: Start difference. First operand 126 states and 143 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:55,427 INFO L93 Difference]: Finished difference Result 166 states and 186 transitions. [2021-10-28 22:56:55,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:56:55,427 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-10-28 22:56:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:55,430 INFO L225 Difference]: With dead ends: 166 [2021-10-28 22:56:55,430 INFO L226 Difference]: Without dead ends: 166 [2021-10-28 22:56:55,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:56:55,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-28 22:56:55,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 138. [2021-10-28 22:56:55,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 117 states have (on average 1.3162393162393162) internal successors, (154), 134 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:55,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 157 transitions. [2021-10-28 22:56:55,436 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 157 transitions. Word has length 25 [2021-10-28 22:56:55,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:55,436 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 157 transitions. [2021-10-28 22:56:55,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:55,437 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 157 transitions. [2021-10-28 22:56:55,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 22:56:55,437 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:55,438 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:55,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-10-28 22:56:55,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:56:55,650 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:56:55,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:55,651 INFO L85 PathProgramCache]: Analyzing trace with hash -211374226, now seen corresponding path program 1 times [2021-10-28 22:56:55,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:56:55,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870616574] [2021-10-28 22:56:55,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:55,651 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:56:55,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:56:55,652 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:56:55,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-28 22:56:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:56,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 22:56:56,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:56,107 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 [2021-10-28 22:56:56,115 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 [2021-10-28 22:56:56,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:56,147 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 27 treesize of output 11 [2021-10-28 22:56:56,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:56,158 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 27 treesize of output 11 [2021-10-28 22:56:56,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:56,249 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 27 treesize of output 11 [2021-10-28 22:56:56,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:56,257 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 27 treesize of output 11 [2021-10-28 22:56:56,300 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-10-28 22:56:56,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 40 [2021-10-28 22:56:56,315 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-28 22:56:56,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-10-28 22:57:03,268 INFO L354 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2021-10-28 22:57:03,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 66 [2021-10-28 22:57:09,841 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-28 22:57:09,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 42 [2021-10-28 22:57:09,862 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-28 22:57:09,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 23 [2021-10-28 22:57:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:57:09,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:57:10,653 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-10-28 22:57:10,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2021-10-28 22:57:13,103 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~x~0.base (_ BitVec 32))) (or (and (= c_main_~head~0.offset c_main_~x~0.offset) (= c_main_~head~0.base main_~x~0.base)) (and (forall ((v_DerPreprocessor_9 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| main_~x~0.base (store (store (select |c_#memory_$Pointer$.offset| main_~x~0.base) (bvadd (_ bv4 32) c_main_~x~0.offset) v_DerPreprocessor_9) c_main_~x~0.offset c_main_~head~0.offset)) c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32))) (forall ((v_DerPreprocessor_10 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| main_~x~0.base (store (store (select |c_#memory_$Pointer$.base| main_~x~0.base) (bvadd (_ bv4 32) c_main_~x~0.offset) v_DerPreprocessor_10) c_main_~x~0.offset c_main_~head~0.base)) c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)))))) is different from false [2021-10-28 22:57:15,174 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~x~0.base (_ BitVec 32))) (or (and (= c_main_~head~0.base main_~x~0.base) (= c_main_~head~0.offset (_ bv0 32))) (and (forall ((v_DerPreprocessor_9 (_ BitVec 32))) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.offset| main_~x~0.base (store (store (select |c_#memory_$Pointer$.offset| main_~x~0.base) (_ bv4 32) v_DerPreprocessor_9) (_ bv0 32) c_main_~head~0.offset)) c_main_~head~0.base) c_main_~head~0.offset))) (forall ((v_DerPreprocessor_10 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| main_~x~0.base (store (store (select |c_#memory_$Pointer$.base| main_~x~0.base) (_ bv4 32) v_DerPreprocessor_10) (_ bv0 32) c_main_~head~0.base)) c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)))))) is different from false [2021-10-28 22:57:17,483 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~x~0.base (_ BitVec 32))) (or (and (forall ((v_DerPreprocessor_11 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32))) (= (_ bv0 32) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_main_~head~0.base (store (select |c_#memory_$Pointer$.offset| c_main_~head~0.base) (bvadd (_ bv4 32) c_main_~head~0.offset) v_DerPreprocessor_11)))) (store .cse0 main_~x~0.base (store (store (select .cse0 main_~x~0.base) (_ bv4 32) v_DerPreprocessor_9) (_ bv0 32) c_main_~head~0.offset))) c_main_~head~0.base) c_main_~head~0.offset))) (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_main_~head~0.base (store (select |c_#memory_$Pointer$.base| c_main_~head~0.base) (bvadd (_ bv4 32) c_main_~head~0.offset) v_DerPreprocessor_12)))) (store .cse1 main_~x~0.base (store (store (select .cse1 main_~x~0.base) (_ bv4 32) v_DerPreprocessor_10) (_ bv0 32) c_main_~head~0.base))) c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)))) (and (= c_main_~head~0.base main_~x~0.base) (= c_main_~head~0.offset (_ bv0 32))))) is different from false [2021-10-28 22:57:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:57:17,752 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:57:17,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1870616574] [2021-10-28 22:57:17,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1870616574] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 22:57:17,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:57:17,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-10-28 22:57:17,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711867217] [2021-10-28 22:57:17,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 22:57:17,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:57:17,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 22:57:17,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=520, Unknown=9, NotChecked=144, Total=756 [2021-10-28 22:57:17,755 INFO L87 Difference]: Start difference. First operand 138 states and 157 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:57:19,920 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$.base| c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)) (forall ((main_~x~0.base (_ BitVec 32))) (or (and (forall ((v_DerPreprocessor_11 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32))) (= (_ bv0 32) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_main_~head~0.base (store (select |c_#memory_$Pointer$.offset| c_main_~head~0.base) (bvadd (_ bv4 32) c_main_~head~0.offset) v_DerPreprocessor_11)))) (store .cse0 main_~x~0.base (store (store (select .cse0 main_~x~0.base) (_ bv4 32) v_DerPreprocessor_9) (_ bv0 32) c_main_~head~0.offset))) c_main_~head~0.base) c_main_~head~0.offset))) (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_main_~head~0.base (store (select |c_#memory_$Pointer$.base| c_main_~head~0.base) (bvadd (_ bv4 32) c_main_~head~0.offset) v_DerPreprocessor_12)))) (store .cse1 main_~x~0.base (store (store (select .cse1 main_~x~0.base) (_ bv4 32) v_DerPreprocessor_10) (_ bv0 32) c_main_~head~0.base))) c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)))) (and (= c_main_~head~0.base main_~x~0.base) (= c_main_~head~0.offset (_ bv0 32))))) (= c_main_~head~0.offset (_ bv0 32))) is different from false [2021-10-28 22:57:21,934 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$.base| c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)) (forall ((main_~x~0.base (_ BitVec 32))) (or (and (= c_main_~head~0.base main_~x~0.base) (= c_main_~head~0.offset (_ bv0 32))) (and (forall ((v_DerPreprocessor_9 (_ BitVec 32))) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.offset| main_~x~0.base (store (store (select |c_#memory_$Pointer$.offset| main_~x~0.base) (_ bv4 32) v_DerPreprocessor_9) (_ bv0 32) c_main_~head~0.offset)) c_main_~head~0.base) c_main_~head~0.offset))) (forall ((v_DerPreprocessor_10 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| main_~x~0.base (store (store (select |c_#memory_$Pointer$.base| main_~x~0.base) (_ bv4 32) v_DerPreprocessor_10) (_ bv0 32) c_main_~head~0.base)) c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)))))) (= c_main_~head~0.offset (_ bv0 32))) is different from false [2021-10-28 22:57:23,941 WARN L838 $PredicateComparison]: unable to prove that (and (= c_main_~x~0.offset (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.base| c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)) (forall ((main_~x~0.base (_ BitVec 32))) (or (and (= c_main_~head~0.offset c_main_~x~0.offset) (= c_main_~head~0.base main_~x~0.base)) (and (forall ((v_DerPreprocessor_9 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| main_~x~0.base (store (store (select |c_#memory_$Pointer$.offset| main_~x~0.base) (bvadd (_ bv4 32) c_main_~x~0.offset) v_DerPreprocessor_9) c_main_~x~0.offset c_main_~head~0.offset)) c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32))) (forall ((v_DerPreprocessor_10 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| main_~x~0.base (store (store (select |c_#memory_$Pointer$.base| main_~x~0.base) (bvadd (_ bv4 32) c_main_~x~0.offset) v_DerPreprocessor_10) c_main_~x~0.offset c_main_~head~0.base)) c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)))))) (= c_main_~head~0.offset (_ bv0 32))) is different from false [2021-10-28 22:58:03,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:58:03,948 INFO L93 Difference]: Finished difference Result 162 states and 181 transitions. [2021-10-28 22:58:03,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 22:58:03,949 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-10-28 22:58:03,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:58:03,951 INFO L225 Difference]: With dead ends: 162 [2021-10-28 22:58:03,951 INFO L226 Difference]: Without dead ends: 162 [2021-10-28 22:58:03,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=214, Invalid=1058, Unknown=12, NotChecked=438, Total=1722 [2021-10-28 22:58:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-10-28 22:58:03,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 141. [2021-10-28 22:58:03,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 120 states have (on average 1.3083333333333333) internal successors, (157), 137 states have internal predecessors, (157), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2021-10-28 22:58:03,957 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 26 [2021-10-28 22:58:03,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:58:03,957 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2021-10-28 22:58:03,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:03,957 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2021-10-28 22:58:03,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 22:58:03,958 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:58:03,958 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:58:03,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-28 22:58:04,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:58:04,164 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:58:04,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:58:04,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1769711335, now seen corresponding path program 1 times [2021-10-28 22:58:04,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:58:04,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244972632] [2021-10-28 22:58:04,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:58:04,165 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:58:04,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:58:04,165 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:58:04,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-28 22:58:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:04,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 22:58:04,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:58:04,655 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 [2021-10-28 22:58:04,669 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 [2021-10-28 22:58:04,807 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 [2021-10-28 22:58:04,815 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 [2021-10-28 22:58:04,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-28 22:58:04,908 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 18 treesize of output 10 [2021-10-28 22:58:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:58:04,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:58:05,031 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 28 treesize of output 24 [2021-10-28 22:58:05,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:58:05,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:58:05,222 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 8 treesize of output 4 [2021-10-28 22:58:05,228 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 8 treesize of output 4 [2021-10-28 22:58:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:58:05,256 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:58:05,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244972632] [2021-10-28 22:58:05,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244972632] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:58:05,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:58:05,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 12 [2021-10-28 22:58:05,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563020791] [2021-10-28 22:58:05,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 22:58:05,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:58:05,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 22:58:05,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:58:05,258 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:06,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:58:06,499 INFO L93 Difference]: Finished difference Result 169 states and 188 transitions. [2021-10-28 22:58:06,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 22:58:06,500 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-10-28 22:58:06,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:58:06,501 INFO L225 Difference]: With dead ends: 169 [2021-10-28 22:58:06,501 INFO L226 Difference]: Without dead ends: 169 [2021-10-28 22:58:06,501 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-10-28 22:58:06,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-28 22:58:06,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2021-10-28 22:58:06,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 131 states have (on average 1.282442748091603) internal successors, (168), 148 states have internal predecessors, (168), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 171 transitions. [2021-10-28 22:58:06,507 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 171 transitions. Word has length 26 [2021-10-28 22:58:06,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:58:06,507 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 171 transitions. [2021-10-28 22:58:06,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 171 transitions. [2021-10-28 22:58:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 22:58:06,508 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:58:06,508 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:58:06,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-28 22:58:06,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:58:06,721 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 22:58:06,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:58:06,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1414436403, now seen corresponding path program 2 times [2021-10-28 22:58:06,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:58:06,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243015605] [2021-10-28 22:58:06,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:58:06,722 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:58:06,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:58:06,723 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:58:06,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-28 22:58:07,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:58:07,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:58:07,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 22:58:07,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:58:07,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:58:07,238 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:58:07,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-28 22:58:07,276 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 [2021-10-28 22:58:07,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 22:58:08,175 INFO L354 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2021-10-28 22:58:08,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2021-10-28 22:58:08,215 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-28 22:58:08,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2021-10-28 22:58:08,266 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 22:58:08,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-10-28 22:58:08,285 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 22:58:08,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 41 [2021-10-28 22:58:08,679 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-28 22:58:08,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2021-10-28 22:58:08,687 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:58:08,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 17 [2021-10-28 22:58:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:58:08,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:58:25,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 22:58:25,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 23847 treesize of output 21259 [2021-10-28 22:58:26,128 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 39442 treesize of output 38994 [2021-10-28 22:58:27,386 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:58:27,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243015605] [2021-10-28 22:58:27,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-28 22:58:27,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [269722423] [2021-10-28 22:58:27,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:58:27,388 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-28 22:58:27,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/cvc4 [2021-10-28 22:58:27,400 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-28 22:58:27,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-28 22:58:27,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:58:27,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324854872] [2021-10-28 22:58:27,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:58:27,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:58:27,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:58:27,976 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:58:27,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 1 [2021-10-28 22:58:27,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 22:58:28,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:58:28,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:58:28,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 22:58:28,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:58:28,695 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:58:28,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-10-28 22:58:28,715 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 [2021-10-28 22:58:28,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 22:58:29,737 INFO L354 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2021-10-28 22:58:29,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2021-10-28 22:58:29,778 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-28 22:58:29,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2021-10-28 22:58:29,829 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 22:58:29,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-10-28 22:58:29,851 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 22:58:29,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 41 [2021-10-28 22:58:30,075 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-28 22:58:30,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2021-10-28 22:58:30,083 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:58:30,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 17 [2021-10-28 22:58:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:58:30,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:58:37,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 22:58:37,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 23847 treesize of output 21259 [2021-10-28 22:58:37,984 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 39442 treesize of output 38994 [2021-10-28 22:58:39,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-28 22:58:39,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:58:39,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-28 22:58:39,262 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-28 22:58:39,262 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-10-28 22:58:39,275 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-28 22:58:39,277 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 22:58:39,277 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 22:58:39,278 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 22:58:39,278 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 22:58:39,278 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 22:58:39,278 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 22:58:39,278 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-28 22:58:39,278 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 22:58:39,279 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 22:58:39,279 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-28 22:58:39,279 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-28 22:58:39,279 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-28 22:58:39,279 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-28 22:58:39,280 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-28 22:58:39,280 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-28 22:58:39,280 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-28 22:58:39,280 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-28 22:58:39,280 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-28 22:58:39,280 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-28 22:58:39,281 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-28 22:58:39,281 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-28 22:58:39,281 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-28 22:58:39,281 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-28 22:58:39,281 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-28 22:58:39,282 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-28 22:58:39,282 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION [2021-10-28 22:58:39,282 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-28 22:58:39,282 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-28 22:58:39,282 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-10-28 22:58:39,282 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-10-28 22:58:39,283 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION [2021-10-28 22:58:39,283 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION [2021-10-28 22:58:39,283 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION [2021-10-28 22:58:39,283 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION [2021-10-28 22:58:39,283 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION [2021-10-28 22:58:39,284 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 22:58:39,284 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37REQUIRES_VIOLATION [2021-10-28 22:58:39,284 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION [2021-10-28 22:58:39,284 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION [2021-10-28 22:58:39,284 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40REQUIRES_VIOLATION [2021-10-28 22:58:39,284 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:58:39,285 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:58:39,285 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:58:39,285 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr44ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 22:58:39,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-28 22:58:39,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-10-28 22:58:39,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:58:39,702 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:58:39,705 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 22:58:39,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 10:58:39 BoogieIcfgContainer [2021-10-28 22:58:39,715 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 22:58:39,715 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 22:58:39,715 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 22:58:39,716 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 22:58:39,716 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:51:36" (3/4) ... [2021-10-28 22:58:39,743 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 22:58:39,743 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 22:58:39,745 INFO L168 Benchmark]: Toolchain (without parser) took 424955.86 ms. Allocated memory was 56.6 MB in the beginning and 400.6 MB in the end (delta: 343.9 MB). Free memory was 33.5 MB in the beginning and 367.1 MB in the end (delta: -333.6 MB). Peak memory consumption was 198.3 MB. Max. memory is 16.1 GB. [2021-10-28 22:58:39,745 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 56.6 MB. Free memory is still 37.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:58:39,745 INFO L168 Benchmark]: CACSL2BoogieTranslator took 646.92 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 33.4 MB in the beginning and 47.3 MB in the end (delta: -13.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-28 22:58:39,746 INFO L168 Benchmark]: Boogie Preprocessor took 73.41 ms. Allocated memory is still 71.3 MB. Free memory was 47.1 MB in the beginning and 44.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 22:58:39,746 INFO L168 Benchmark]: RCFGBuilder took 1099.22 ms. Allocated memory is still 71.3 MB. Free memory was 44.0 MB in the beginning and 34.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 12.2 MB. Max. memory is 16.1 GB. [2021-10-28 22:58:39,747 INFO L168 Benchmark]: TraceAbstraction took 423078.39 ms. Allocated memory was 71.3 MB in the beginning and 327.2 MB in the end (delta: 255.9 MB). Free memory was 51.2 MB in the beginning and 106.0 MB in the end (delta: -54.8 MB). Peak memory consumption was 201.4 MB. Max. memory is 16.1 GB. [2021-10-28 22:58:39,748 INFO L168 Benchmark]: Witness Printer took 28.07 ms. Allocated memory was 327.2 MB in the beginning and 400.6 MB in the end (delta: 73.4 MB). Free memory was 106.0 MB in the beginning and 367.1 MB in the end (delta: -261.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:58:39,750 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 56.6 MB. Free memory is still 37.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 646.92 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 33.4 MB in the beginning and 47.3 MB in the end (delta: -13.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 73.41 ms. Allocated memory is still 71.3 MB. Free memory was 47.1 MB in the beginning and 44.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1099.22 ms. Allocated memory is still 71.3 MB. Free memory was 44.0 MB in the beginning and 34.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 12.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 423078.39 ms. Allocated memory was 71.3 MB in the beginning and 327.2 MB in the end (delta: 255.9 MB). Free memory was 51.2 MB in the beginning and 106.0 MB in the end (delta: -54.8 MB). Peak memory consumption was 201.4 MB. Max. memory is 16.1 GB. * Witness Printer took 28.07 ms. Allocated memory was 327.2 MB in the beginning and 400.6 MB in the end (delta: 73.4 MB). Free memory was 106.0 MB in the beginning and 367.1 MB in the end (delta: -261.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1026]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L999] SLL* head = malloc(sizeof(SLL)); [L1000] head->next = ((void*)0) [L1001] head->data = 0 [L1003] SLL* x = head; [L1006] COND TRUE __VERIFIER_nondet_int() [L1009] x->next = malloc(sizeof(SLL)) [L1010] EXPR x->next [L1010] x = x->next [L1011] x->data = 0 [L1012] x->next = ((void*)0) [L1006] COND FALSE !(__VERIFIER_nondet_int()) [L1016] COND FALSE !(__VERIFIER_nondet_int()) [L1025] x = head [L1026] x->next [L1026] COND TRUE x->next [L1028] COND FALSE !(__VERIFIER_nondet_int()) [L1029] EXPR x->next [L1029] x = x->next [L1026] x->next [L1026] COND TRUE x->next [L1028] COND FALSE !(__VERIFIER_nondet_int()) [L1029] EXPR x->next [L1029] x = x->next [L1026] x->next - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1018]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1018]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1026]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1036]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1036]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1053]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1054]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1054]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 996]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 111 locations, 45 error locations. Started 1 CEGAR loops. OverallTime: 422.9s, OverallIterations: 18, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 240.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 928 SDtfs, 2351 SDslu, 3452 SDs, 0 SdLazy, 6495 SolverSat, 676 SolverUnsat, 19 SolverUnknown, 0 SolverNotchecked, 66.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 726 GetRequests, 422 SyntacticMatches, 39 SemanticMatches, 265 ConstructedPredicates, 9 IntricatePredicates, 2 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 300.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=152occurred in iteration=17, InterpolantAutomatonStates: 196, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 465 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 162.4s InterpolantComputationTime, 346 NumberOfCodeBlocks, 346 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 628 ConstructedInterpolants, 74 QuantifiedInterpolants, 7997 SizeOfPredicates, 156 NumberOfNonLiveVariables, 1950 ConjunctsInSsa, 212 ConjunctsInUnsatCore, 35 InterpolantComputations, 28 PerfectInterpolantSequences, 13/26 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-28 22:58:39,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe55e9c5-95dc-4672-ba94-f445768a8b3b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...