./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa --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 6c2ed91303515fb47ae50633bb4ba0c83e07781b13d03a95e0e32251f9fc3016 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:10:41,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:10:41,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:10:41,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:10:41,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:10:41,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:10:41,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:10:41,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:10:41,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:10:41,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:10:41,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:10:41,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:10:41,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:10:41,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:10:41,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:10:41,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:10:41,857 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:10:41,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:10:41,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:10:41,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:10:41,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:10:41,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:10:41,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:10:41,866 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:10:41,869 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:10:41,869 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:10:41,870 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:10:41,870 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:10:41,871 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:10:41,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:10:41,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:10:41,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:10:41,873 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:10:41,874 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:10:41,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:10:41,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:10:41,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:10:41,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:10:41,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:10:41,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:10:41,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:10:41,878 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 23:10:41,896 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:10:41,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:10:41,897 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:10:41,897 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:10:41,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:10:41,897 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:10:41,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:10:41,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:10:41,898 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:10:41,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:10:41,899 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:10:41,899 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 23:10:41,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:10:41,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:10:41,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:10:41,899 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 23:10:41,899 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 23:10:41,899 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 23:10:41,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:10:41,900 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 23:10:41,900 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:10:41,900 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:10:41,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:10:41,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:10:41,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:10:41,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:10:41,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:10:41,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:10:41,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:10:41,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:10:41,901 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:10:41,901 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_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c2ed91303515fb47ae50633bb4ba0c83e07781b13d03a95e0e32251f9fc3016 [2021-12-06 23:10:42,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:10:42,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:10:42,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:10:42,109 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:10:42,110 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:10:42,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/list-simple/dll2c_remove_all.i [2021-12-06 23:10:42,152 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/data/7c82f7411/e6923aa4061c450bb8c52da3b73951fc/FLAG4eb694f44 [2021-12-06 23:10:42,588 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:10:42,589 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/sv-benchmarks/c/list-simple/dll2c_remove_all.i [2021-12-06 23:10:42,599 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/data/7c82f7411/e6923aa4061c450bb8c52da3b73951fc/FLAG4eb694f44 [2021-12-06 23:10:42,611 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/data/7c82f7411/e6923aa4061c450bb8c52da3b73951fc [2021-12-06 23:10:42,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:10:42,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:10:42,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:10:42,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:10:42,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:10:42,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:10:42" (1/1) ... [2021-12-06 23:10:42,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c7835cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:42, skipping insertion in model container [2021-12-06 23:10:42,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:10:42" (1/1) ... [2021-12-06 23:10:42,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:10:42,657 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:10:42,854 WARN L230 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_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/sv-benchmarks/c/list-simple/dll2c_remove_all.i[24169,24182] [2021-12-06 23:10:42,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:10:42,862 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:10:42,891 WARN L230 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_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/sv-benchmarks/c/list-simple/dll2c_remove_all.i[24169,24182] [2021-12-06 23:10:42,892 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:10:42,914 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:10:42,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:42 WrapperNode [2021-12-06 23:10:42,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:10:42,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:10:42,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:10:42,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:10:42,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:42" (1/1) ... [2021-12-06 23:10:42,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:42" (1/1) ... [2021-12-06 23:10:42,950 INFO L137 Inliner]: procedures = 126, calls = 38, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 111 [2021-12-06 23:10:42,950 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:10:42,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:10:42,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:10:42,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:10:42,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:42" (1/1) ... [2021-12-06 23:10:42,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:42" (1/1) ... [2021-12-06 23:10:42,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:42" (1/1) ... [2021-12-06 23:10:42,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:42" (1/1) ... [2021-12-06 23:10:42,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:42" (1/1) ... [2021-12-06 23:10:42,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:42" (1/1) ... [2021-12-06 23:10:42,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:42" (1/1) ... [2021-12-06 23:10:42,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:10:42,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:10:42,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:10:42,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:10:42,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:42" (1/1) ... [2021-12-06 23:10:42,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:10:42,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:10:43,008 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:10:43,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:10:43,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 23:10:43,046 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-06 23:10:43,047 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-06 23:10:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 23:10:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:10:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 23:10:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 23:10:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 23:10:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 23:10:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 23:10:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:10:43,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:10:43,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:10:43,130 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:10:43,131 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:10:43,395 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:10:43,402 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:10:43,402 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 23:10:43,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:10:43 BoogieIcfgContainer [2021-12-06 23:10:43,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:10:43,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:10:43,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:10:43,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:10:43,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:10:42" (1/3) ... [2021-12-06 23:10:43,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3edeb22c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:10:43, skipping insertion in model container [2021-12-06 23:10:43,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:42" (2/3) ... [2021-12-06 23:10:43,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3edeb22c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:10:43, skipping insertion in model container [2021-12-06 23:10:43,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:10:43" (3/3) ... [2021-12-06 23:10:43,410 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_remove_all.i [2021-12-06 23:10:43,415 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:10:43,416 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2021-12-06 23:10:43,450 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:10:43,455 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 [2021-12-06 23:10:43,455 INFO L340 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2021-12-06 23:10:43,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 48 states have (on average 2.125) internal successors, (102), 94 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:10:43,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 23:10:43,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:43,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 23:10:43,475 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:43,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:43,480 INFO L85 PathProgramCache]: Analyzing trace with hash 893702386, now seen corresponding path program 1 times [2021-12-06 23:10:43,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:43,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604075825] [2021-12-06 23:10:43,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:43,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:10:43,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:10:43,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604075825] [2021-12-06 23:10:43,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604075825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:10:43,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:10:43,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:10:43,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064284379] [2021-12-06 23:10:43,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:10:43,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:10:43,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:10:43,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:10:43,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:10:43,656 INFO L87 Difference]: Start difference. First operand has 98 states, 48 states have (on average 2.125) internal successors, (102), 94 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 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 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:10:43,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:43,736 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2021-12-06 23:10:43,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:10:43,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 23:10:43,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:43,744 INFO L225 Difference]: With dead ends: 95 [2021-12-06 23:10:43,744 INFO L226 Difference]: Without dead ends: 92 [2021-12-06 23:10:43,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:10:43,748 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 10 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:43,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 136 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:10:43,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-06 23:10:43,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-12-06 23:10:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 46 states have (on average 2.0) internal successors, (92), 88 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:10:43,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-12-06 23:10:43,779 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 6 [2021-12-06 23:10:43,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:43,779 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-12-06 23:10:43,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:10:43,779 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-12-06 23:10:43,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 23:10:43,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:43,780 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 23:10:43,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:10:43,780 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:43,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:43,781 INFO L85 PathProgramCache]: Analyzing trace with hash 893702387, now seen corresponding path program 1 times [2021-12-06 23:10:43,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:43,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636646570] [2021-12-06 23:10:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:43,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:43,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:10:43,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:10:43,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636646570] [2021-12-06 23:10:43,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636646570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:10:43,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:10:43,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:10:43,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070968] [2021-12-06 23:10:43,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:10:43,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:10:43,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:10:43,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:10:43,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:10:43,826 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:10:43,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:43,883 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2021-12-06 23:10:43,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:10:43,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 23:10:43,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:43,885 INFO L225 Difference]: With dead ends: 89 [2021-12-06 23:10:43,885 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 23:10:43,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:10:43,886 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 5 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:43,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 138 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:10:43,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 23:10:43,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-06 23:10:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 46 states have (on average 1.934782608695652) internal successors, (89), 85 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:10:43,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-12-06 23:10:43,893 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 6 [2021-12-06 23:10:43,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:43,894 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-12-06 23:10:43,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:10:43,894 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-12-06 23:10:43,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 23:10:43,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:43,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:43,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:10:43,895 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:43,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:43,895 INFO L85 PathProgramCache]: Analyzing trace with hash -413883200, now seen corresponding path program 1 times [2021-12-06 23:10:43,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:43,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588216474] [2021-12-06 23:10:43,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:43,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:43,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:10:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:10:43,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:10:43,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588216474] [2021-12-06 23:10:43,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588216474] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:10:43,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:10:43,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:10:43,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733767442] [2021-12-06 23:10:43,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:10:43,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:10:43,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:10:43,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:10:43,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:10:43,971 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:10:44,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:44,044 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2021-12-06 23:10:44,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:10:44,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-06 23:10:44,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:44,045 INFO L225 Difference]: With dead ends: 100 [2021-12-06 23:10:44,046 INFO L226 Difference]: Without dead ends: 100 [2021-12-06 23:10:44,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:10:44,047 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 10 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:44,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 206 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:10:44,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-06 23:10:44,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2021-12-06 23:10:44,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 86 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:10:44,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-12-06 23:10:44,055 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 14 [2021-12-06 23:10:44,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:44,055 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-12-06 23:10:44,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:10:44,056 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-12-06 23:10:44,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 23:10:44,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:44,056 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:44,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 23:10:44,057 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:44,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:44,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1410538016, now seen corresponding path program 1 times [2021-12-06 23:10:44,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:44,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554665610] [2021-12-06 23:10:44,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:44,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:44,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:10:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:44,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 23:10:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 23:10:44,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:10:44,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554665610] [2021-12-06 23:10:44,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554665610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:10:44,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:10:44,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:10:44,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405524592] [2021-12-06 23:10:44,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:10:44,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:10:44,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:10:44,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:10:44,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:10:44,186 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:10:44,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:44,354 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2021-12-06 23:10:44,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:10:44,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-06 23:10:44,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:44,357 INFO L225 Difference]: With dead ends: 139 [2021-12-06 23:10:44,357 INFO L226 Difference]: Without dead ends: 139 [2021-12-06 23:10:44,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:10:44,359 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 69 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:44,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 240 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:10:44,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-06 23:10:44,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 89. [2021-12-06 23:10:44,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 85 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:10:44,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-12-06 23:10:44,366 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 24 [2021-12-06 23:10:44,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:44,366 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-12-06 23:10:44,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:10:44,366 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-12-06 23:10:44,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 23:10:44,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:44,367 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:44,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 23:10:44,367 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:44,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:44,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1410538017, now seen corresponding path program 1 times [2021-12-06 23:10:44,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:44,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502283499] [2021-12-06 23:10:44,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:44,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:44,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:10:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:44,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 23:10:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:10:44,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:10:44,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502283499] [2021-12-06 23:10:44,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502283499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:10:44,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:10:44,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:10:44,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108945185] [2021-12-06 23:10:44,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:10:44,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:10:44,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:10:44,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:10:44,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:10:44,485 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:10:44,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:44,616 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2021-12-06 23:10:44,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:10:44,617 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-06 23:10:44,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:44,618 INFO L225 Difference]: With dead ends: 89 [2021-12-06 23:10:44,618 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 23:10:44,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:10:44,620 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 78 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:44,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 230 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:10:44,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 23:10:44,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-12-06 23:10:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 47 states have (on average 1.872340425531915) internal successors, (88), 84 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:10:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-12-06 23:10:44,628 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 24 [2021-12-06 23:10:44,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:44,628 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-12-06 23:10:44,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:10:44,629 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-12-06 23:10:44,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 23:10:44,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:44,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:44,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 23:10:44,630 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:44,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:44,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1682632447, now seen corresponding path program 1 times [2021-12-06 23:10:44,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:44,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100892629] [2021-12-06 23:10:44,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:44,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:44,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:10:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:44,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 23:10:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:10:44,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:10:44,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100892629] [2021-12-06 23:10:44,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100892629] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:10:44,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078456087] [2021-12-06 23:10:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:44,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:10:44,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:10:44,773 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:10:44,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:10:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:44,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 23:10:44,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:10:44,904 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 [2021-12-06 23:10:45,096 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 23:10:45,096 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 [2021-12-06 23:10:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:10:45,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:10:45,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078456087] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:10:45,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:10:45,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-12-06 23:10:45,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400039631] [2021-12-06 23:10:45,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:10:45,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:10:45,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:10:45,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:10:45,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:10:45,154 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 23:10:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:45,326 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2021-12-06 23:10:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:10:45,327 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-12-06 23:10:45,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:45,328 INFO L225 Difference]: With dead ends: 144 [2021-12-06 23:10:45,328 INFO L226 Difference]: Without dead ends: 144 [2021-12-06 23:10:45,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:10:45,329 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 61 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:45,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 337 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 365 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2021-12-06 23:10:45,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-06 23:10:45,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 93. [2021-12-06 23:10:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 88 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:10:45,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2021-12-06 23:10:45,338 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 26 [2021-12-06 23:10:45,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:45,339 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2021-12-06 23:10:45,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 23:10:45,339 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2021-12-06 23:10:45,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 23:10:45,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:45,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:45,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:10:45,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 23:10:45,541 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:45,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:45,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1682632446, now seen corresponding path program 1 times [2021-12-06 23:10:45,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:45,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664672698] [2021-12-06 23:10:45,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:45,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:45,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:10:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:45,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 23:10:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:10:45,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:10:45,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664672698] [2021-12-06 23:10:45,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664672698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:10:45,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024100970] [2021-12-06 23:10:45,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:45,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:10:45,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:10:45,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:10:45,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:10:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:45,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 23:10:45,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:10:45,787 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 [2021-12-06 23:10:45,792 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 [2021-12-06 23:10:45,935 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-12-06 23:10:45,936 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 14 treesize of output 13 [2021-12-06 23:10:45,951 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 23:10:45,951 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 [2021-12-06 23:10:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:10:45,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:10:46,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024100970] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:10:46,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:10:46,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2021-12-06 23:10:46,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662234177] [2021-12-06 23:10:46,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:10:46,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 23:10:46,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:10:46,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 23:10:46,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:10:46,062 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 23:10:46,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:46,332 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2021-12-06 23:10:46,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:10:46,333 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-12-06 23:10:46,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:46,334 INFO L225 Difference]: With dead ends: 95 [2021-12-06 23:10:46,334 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 23:10:46,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:10:46,335 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 20 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:46,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 470 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:10:46,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 23:10:46,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-12-06 23:10:46,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 88 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:10:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2021-12-06 23:10:46,340 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 26 [2021-12-06 23:10:46,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:46,340 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2021-12-06 23:10:46,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 23:10:46,340 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2021-12-06 23:10:46,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 23:10:46,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:46,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:46,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:10:46,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:10:46,542 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:46,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:46,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2101924137, now seen corresponding path program 1 times [2021-12-06 23:10:46,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:46,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126479729] [2021-12-06 23:10:46,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:46,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:46,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:46,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:10:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:46,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 23:10:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:10:46,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:10:46,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126479729] [2021-12-06 23:10:46,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126479729] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:10:46,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881318464] [2021-12-06 23:10:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:46,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:10:46,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:10:46,696 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:10:46,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:10:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:46,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 23:10:46,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:10:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:10:46,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:10:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:10:46,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881318464] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:10:46,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:10:46,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2021-12-06 23:10:46,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140403460] [2021-12-06 23:10:46,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:10:46,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:10:46,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:10:46,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:10:46,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:10:46,882 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:10:46,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:46,961 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-12-06 23:10:46,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:10:46,961 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-06 23:10:46,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:46,962 INFO L225 Difference]: With dead ends: 94 [2021-12-06 23:10:46,962 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 23:10:46,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:10:46,963 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 4 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:46,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 422 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:10:46,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 23:10:46,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-12-06 23:10:46,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 51 states have (on average 1.803921568627451) internal successors, (92), 88 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:10:46,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2021-12-06 23:10:46,967 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 28 [2021-12-06 23:10:46,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:46,968 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2021-12-06 23:10:46,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:10:46,968 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2021-12-06 23:10:46,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 23:10:46,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:46,969 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:47,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:10:47,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 23:10:47,169 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:47,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:47,170 INFO L85 PathProgramCache]: Analyzing trace with hash -739919470, now seen corresponding path program 1 times [2021-12-06 23:10:47,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:47,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669449627] [2021-12-06 23:10:47,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:47,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:47,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:10:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:47,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 23:10:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 23:10:47,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:10:47,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669449627] [2021-12-06 23:10:47,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669449627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:10:47,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756578279] [2021-12-06 23:10:47,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:47,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:10:47,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:10:47,244 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:10:47,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:10:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:47,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 23:10:47,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:10:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 23:10:47,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:10:47,367 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 23:10:47,368 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 12 treesize of output 11 [2021-12-06 23:10:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 23:10:47,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756578279] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:10:47,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:10:47,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2021-12-06 23:10:47,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235888067] [2021-12-06 23:10:47,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:10:47,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:10:47,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:10:47,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:10:47,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:10:47,400 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 23:10:47,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:47,518 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2021-12-06 23:10:47,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:10:47,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-12-06 23:10:47,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:47,519 INFO L225 Difference]: With dead ends: 147 [2021-12-06 23:10:47,519 INFO L226 Difference]: Without dead ends: 147 [2021-12-06 23:10:47,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:10:47,520 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 108 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:47,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 223 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:10:47,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-06 23:10:47,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 96. [2021-12-06 23:10:47,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 91 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:10:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2021-12-06 23:10:47,527 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 29 [2021-12-06 23:10:47,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:47,527 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2021-12-06 23:10:47,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 23:10:47,528 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2021-12-06 23:10:47,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 23:10:47,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:47,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:47,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:10:47,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:10:47,733 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:47,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:47,733 INFO L85 PathProgramCache]: Analyzing trace with hash -739919469, now seen corresponding path program 1 times [2021-12-06 23:10:47,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:47,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296347744] [2021-12-06 23:10:47,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:47,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:47,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:10:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:47,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 23:10:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:10:47,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:10:47,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296347744] [2021-12-06 23:10:47,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296347744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:10:47,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819262028] [2021-12-06 23:10:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:47,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:10:47,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:10:47,828 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:10:47,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:10:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:47,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 23:10:47,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:10:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:10:48,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:10:48,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:10:48,038 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 19 treesize of output 23 [2021-12-06 23:10:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:10:48,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819262028] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:10:48,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:10:48,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2021-12-06 23:10:48,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901629402] [2021-12-06 23:10:48,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:10:48,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 23:10:48,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:10:48,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 23:10:48,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-12-06 23:10:48,143 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 23:10:48,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:48,348 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2021-12-06 23:10:48,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:10:48,348 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2021-12-06 23:10:48,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:48,349 INFO L225 Difference]: With dead ends: 160 [2021-12-06 23:10:48,350 INFO L226 Difference]: Without dead ends: 160 [2021-12-06 23:10:48,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:10:48,350 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 140 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:48,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 502 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:10:48,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-06 23:10:48,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 96. [2021-12-06 23:10:48,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 91 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:10:48,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2021-12-06 23:10:48,355 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 29 [2021-12-06 23:10:48,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:48,356 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2021-12-06 23:10:48,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 23:10:48,356 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2021-12-06 23:10:48,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 23:10:48,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:48,357 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:48,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 23:10:48,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 23:10:48,558 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:48,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:48,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1462667085, now seen corresponding path program 1 times [2021-12-06 23:10:48,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:48,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787577825] [2021-12-06 23:10:48,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:48,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:48,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:10:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:48,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 23:10:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 23:10:48,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:10:48,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787577825] [2021-12-06 23:10:48,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787577825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:10:48,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:10:48,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:10:48,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742812731] [2021-12-06 23:10:48,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:10:48,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 23:10:48,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:10:48,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 23:10:48,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:10:48,734 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:10:48,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:48,903 INFO L93 Difference]: Finished difference Result 145 states and 153 transitions. [2021-12-06 23:10:48,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 23:10:48,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-06 23:10:48,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:48,904 INFO L225 Difference]: With dead ends: 145 [2021-12-06 23:10:48,904 INFO L226 Difference]: Without dead ends: 145 [2021-12-06 23:10:48,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:10:48,906 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 119 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:48,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 264 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:10:48,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-06 23:10:48,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 95. [2021-12-06 23:10:48,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 90 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:10:48,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2021-12-06 23:10:48,910 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 30 [2021-12-06 23:10:48,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:48,911 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2021-12-06 23:10:48,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:10:48,911 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2021-12-06 23:10:48,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 23:10:48,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:48,912 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:48,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 23:10:48,912 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:48,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:48,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1462667084, now seen corresponding path program 1 times [2021-12-06 23:10:48,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:48,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240353925] [2021-12-06 23:10:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:48,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:48,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:10:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:48,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 23:10:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:10:49,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:10:49,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240353925] [2021-12-06 23:10:49,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240353925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:10:49,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:10:49,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:10:49,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220710687] [2021-12-06 23:10:49,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:10:49,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 23:10:49,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:10:49,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 23:10:49,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:10:49,007 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:10:49,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:49,134 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-12-06 23:10:49,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 23:10:49,135 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-06 23:10:49,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:49,135 INFO L225 Difference]: With dead ends: 94 [2021-12-06 23:10:49,136 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 23:10:49,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:10:49,136 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 138 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:49,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 225 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:10:49,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 23:10:49,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-12-06 23:10:49,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 89 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:10:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2021-12-06 23:10:49,140 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 30 [2021-12-06 23:10:49,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:49,141 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2021-12-06 23:10:49,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:10:49,141 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2021-12-06 23:10:49,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 23:10:49,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:49,142 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-12-06 23:10:49,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 23:10:49,142 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:49,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:49,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2100539926, now seen corresponding path program 1 times [2021-12-06 23:10:49,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:49,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11906093] [2021-12-06 23:10:49,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:49,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:49,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:10:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:49,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 23:10:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:10:49,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:10:49,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11906093] [2021-12-06 23:10:49,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11906093] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:10:49,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204439272] [2021-12-06 23:10:49,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:49,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:10:49,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:10:49,280 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:10:49,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:10:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:49,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 23:10:49,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:10:49,382 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 [2021-12-06 23:10:49,466 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 88035 column 46: unknown constant v_#valid_BEFORE_CALL_6 [2021-12-06 23:10:49,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:10:49,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-12-06 23:10:49,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816067366] [2021-12-06 23:10:49,467 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 23:10:49,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:10:49,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:10:49,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:10:49,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:10:49,468 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:10:49,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 23:10:49,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:10:49,469 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:49,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:10:49,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:10:49,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:10:49,672 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@2790dc7e at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-06 23:10:49,682 INFO L158 Benchmark]: Toolchain (without parser) took 7066.75ms. Allocated memory was 83.9MB in the beginning and 121.6MB in the end (delta: 37.7MB). Free memory was 46.4MB in the beginning and 86.5MB in the end (delta: -40.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 23:10:49,683 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 83.9MB. Free memory is still 64.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 23:10:49,684 INFO L158 Benchmark]: CACSL2BoogieTranslator took 298.71ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 46.2MB in the beginning and 67.6MB in the end (delta: -21.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-06 23:10:49,685 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.44ms. Allocated memory is still 100.7MB. Free memory was 67.6MB in the beginning and 65.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 23:10:49,686 INFO L158 Benchmark]: Boogie Preprocessor took 30.47ms. Allocated memory is still 100.7MB. Free memory was 65.5MB in the beginning and 63.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 23:10:49,687 INFO L158 Benchmark]: RCFGBuilder took 422.20ms. Allocated memory is still 100.7MB. Free memory was 63.8MB in the beginning and 46.2MB in the end (delta: 17.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-12-06 23:10:49,688 INFO L158 Benchmark]: TraceAbstraction took 6276.13ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 45.7MB in the beginning and 86.5MB in the end (delta: -40.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 23:10:49,693 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 83.9MB. Free memory is still 64.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 298.71ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 46.2MB in the beginning and 67.6MB in the end (delta: -21.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.44ms. Allocated memory is still 100.7MB. Free memory was 67.6MB in the beginning and 65.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.47ms. Allocated memory is still 100.7MB. Free memory was 65.5MB in the beginning and 63.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 422.20ms. Allocated memory is still 100.7MB. Free memory was 63.8MB in the beginning and 46.2MB in the end (delta: 17.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 6276.13ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 45.7MB in the beginning and 86.5MB in the end (delta: -40.7MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@2790dc7e de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@2790dc7e: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-06 23:10:49,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 1 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa --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 6c2ed91303515fb47ae50633bb4ba0c83e07781b13d03a95e0e32251f9fc3016 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:10:51,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:10:51,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:10:51,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:10:51,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:10:51,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:10:51,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:10:51,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:10:51,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:10:51,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:10:51,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:10:51,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:10:51,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:10:51,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:10:51,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:10:51,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:10:51,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:10:51,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:10:51,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:10:51,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:10:51,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:10:51,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:10:51,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:10:51,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:10:51,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:10:51,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:10:51,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:10:51,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:10:51,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:10:51,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:10:51,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:10:51,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:10:51,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:10:51,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:10:51,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:10:51,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:10:51,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:10:51,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:10:51,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:10:51,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:10:51,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:10:51,395 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-06 23:10:51,421 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:10:51,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:10:51,422 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:10:51,422 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:10:51,423 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:10:51,423 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:10:51,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:10:51,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:10:51,424 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:10:51,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:10:51,424 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:10:51,425 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 23:10:51,425 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:10:51,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:10:51,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:10:51,425 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 23:10:51,426 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 23:10:51,426 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 23:10:51,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:10:51,426 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 23:10:51,426 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 23:10:51,426 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 23:10:51,426 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:10:51,426 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:10:51,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:10:51,427 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:10:51,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:10:51,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:10:51,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:10:51,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:10:51,427 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 23:10:51,427 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 23:10:51,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:10:51,428 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 23:10:51,428 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_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c2ed91303515fb47ae50633bb4ba0c83e07781b13d03a95e0e32251f9fc3016 [2021-12-06 23:10:51,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:10:51,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:10:51,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:10:51,664 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:10:51,665 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:10:51,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/list-simple/dll2c_remove_all.i [2021-12-06 23:10:51,708 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/data/8789724b9/488f29f3be85417c890e8c81892237a8/FLAG1d2865ac7 [2021-12-06 23:10:52,137 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:10:52,137 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/sv-benchmarks/c/list-simple/dll2c_remove_all.i [2021-12-06 23:10:52,148 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/data/8789724b9/488f29f3be85417c890e8c81892237a8/FLAG1d2865ac7 [2021-12-06 23:10:52,159 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/data/8789724b9/488f29f3be85417c890e8c81892237a8 [2021-12-06 23:10:52,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:10:52,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:10:52,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:10:52,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:10:52,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:10:52,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:10:52" (1/1) ... [2021-12-06 23:10:52,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38b053d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:52, skipping insertion in model container [2021-12-06 23:10:52,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:10:52" (1/1) ... [2021-12-06 23:10:52,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:10:52,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:10:52,423 WARN L230 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_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/sv-benchmarks/c/list-simple/dll2c_remove_all.i[24169,24182] [2021-12-06 23:10:52,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:10:52,434 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:10:52,465 WARN L230 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_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/sv-benchmarks/c/list-simple/dll2c_remove_all.i[24169,24182] [2021-12-06 23:10:52,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:10:52,491 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:10:52,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:52 WrapperNode [2021-12-06 23:10:52,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:10:52,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:10:52,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:10:52,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:10:52,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:52" (1/1) ... [2021-12-06 23:10:52,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:52" (1/1) ... [2021-12-06 23:10:52,530 INFO L137 Inliner]: procedures = 129, calls = 38, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 112 [2021-12-06 23:10:52,530 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:10:52,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:10:52,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:10:52,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:10:52,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:52" (1/1) ... [2021-12-06 23:10:52,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:52" (1/1) ... [2021-12-06 23:10:52,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:52" (1/1) ... [2021-12-06 23:10:52,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:52" (1/1) ... [2021-12-06 23:10:52,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:52" (1/1) ... [2021-12-06 23:10:52,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:52" (1/1) ... [2021-12-06 23:10:52,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:52" (1/1) ... [2021-12-06 23:10:52,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:10:52,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:10:52,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:10:52,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:10:52,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:52" (1/1) ... [2021-12-06 23:10:52,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:10:52,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:10:52,585 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:10:52,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:10:52,621 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-06 23:10:52,622 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-06 23:10:52,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 23:10:52,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:10:52,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 23:10:52,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 23:10:52,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 23:10:52,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 23:10:52,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-06 23:10:52,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 23:10:52,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 23:10:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:10:52,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:10:52,701 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:10:52,702 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:10:53,101 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:10:53,107 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:10:53,107 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 23:10:53,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:10:53 BoogieIcfgContainer [2021-12-06 23:10:53,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:10:53,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:10:53,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:10:53,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:10:53,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:10:52" (1/3) ... [2021-12-06 23:10:53,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2919a212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:10:53, skipping insertion in model container [2021-12-06 23:10:53,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:10:52" (2/3) ... [2021-12-06 23:10:53,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2919a212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:10:53, skipping insertion in model container [2021-12-06 23:10:53,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:10:53" (3/3) ... [2021-12-06 23:10:53,115 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_remove_all.i [2021-12-06 23:10:53,120 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:10:53,120 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2021-12-06 23:10:53,155 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:10:53,160 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 [2021-12-06 23:10:53,161 INFO L340 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2021-12-06 23:10:53,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 48 states have (on average 2.125) internal successors, (102), 94 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:10:53,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 23:10:53,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:53,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 23:10:53,181 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:53,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:53,186 INFO L85 PathProgramCache]: Analyzing trace with hash 893702386, now seen corresponding path program 1 times [2021-12-06 23:10:53,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:10:53,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606084297] [2021-12-06 23:10:53,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:53,195 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:10:53,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:10:53,196 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:10:53,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 23:10:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:53,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 23:10:53,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:10:53,319 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 [2021-12-06 23:10:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:10:53,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:10:53,333 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:10:53,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606084297] [2021-12-06 23:10:53,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606084297] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:10:53,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:10:53,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:10:53,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493915856] [2021-12-06 23:10:53,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:10:53,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:10:53,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:10:53,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:10:53,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:10:53,366 INFO L87 Difference]: Start difference. First operand has 98 states, 48 states have (on average 2.125) internal successors, (102), 94 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 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 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:10:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:53,523 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2021-12-06 23:10:53,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:10:53,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 23:10:53,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:53,533 INFO L225 Difference]: With dead ends: 95 [2021-12-06 23:10:53,534 INFO L226 Difference]: Without dead ends: 92 [2021-12-06 23:10:53,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:10:53,538 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 10 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:53,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 136 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:10:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-06 23:10:53,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-12-06 23:10:53,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 46 states have (on average 2.0) internal successors, (92), 88 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:10:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-12-06 23:10:53,574 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 6 [2021-12-06 23:10:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:53,574 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-12-06 23:10:53,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:10:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-12-06 23:10:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 23:10:53,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:53,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 23:10:53,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:10:53,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:10:53,777 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:53,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:53,779 INFO L85 PathProgramCache]: Analyzing trace with hash 893702387, now seen corresponding path program 1 times [2021-12-06 23:10:53,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:10:53,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698874576] [2021-12-06 23:10:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:53,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:10:53,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:10:53,785 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:10:53,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 23:10:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:53,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:10:53,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:10:53,948 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 [2021-12-06 23:10:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:10:53,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:10:53,962 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:10:53,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698874576] [2021-12-06 23:10:53,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698874576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:10:53,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:10:53,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:10:53,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432436765] [2021-12-06 23:10:53,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:10:53,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:10:53,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:10:53,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:10:53,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:10:53,965 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:10:54,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:54,161 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2021-12-06 23:10:54,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:10:54,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 23:10:54,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:54,163 INFO L225 Difference]: With dead ends: 89 [2021-12-06 23:10:54,163 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 23:10:54,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:10:54,165 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 5 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:54,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 138 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:10:54,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 23:10:54,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-06 23:10:54,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 46 states have (on average 1.934782608695652) internal successors, (89), 85 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:10:54,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-12-06 23:10:54,172 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 6 [2021-12-06 23:10:54,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:54,172 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-12-06 23:10:54,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:10:54,173 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-12-06 23:10:54,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 23:10:54,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:54,174 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:54,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 23:10:54,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:10:54,375 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:54,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:54,376 INFO L85 PathProgramCache]: Analyzing trace with hash -413883200, now seen corresponding path program 1 times [2021-12-06 23:10:54,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:10:54,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129301336] [2021-12-06 23:10:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:54,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:10:54,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:10:54,380 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:10:54,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 23:10:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:54,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:10:54,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:10:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:10:54,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:10:54,506 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:10:54,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129301336] [2021-12-06 23:10:54,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129301336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:10:54,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:10:54,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:10:54,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850225145] [2021-12-06 23:10:54,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:10:54,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:10:54,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:10:54,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:10:54,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:10:54,508 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:10:54,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:54,516 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2021-12-06 23:10:54,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:10:54,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-06 23:10:54,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:54,518 INFO L225 Difference]: With dead ends: 100 [2021-12-06 23:10:54,518 INFO L226 Difference]: Without dead ends: 100 [2021-12-06 23:10:54,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:10:54,519 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 10 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:54,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 179 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:10:54,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-06 23:10:54,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2021-12-06 23:10:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 86 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:10:54,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-12-06 23:10:54,527 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 14 [2021-12-06 23:10:54,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:54,527 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-12-06 23:10:54,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:10:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-12-06 23:10:54,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 23:10:54,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:54,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:54,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 23:10:54,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:10:54,730 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:54,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:54,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1410538016, now seen corresponding path program 1 times [2021-12-06 23:10:54,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:10:54,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045818911] [2021-12-06 23:10:54,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:54,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:10:54,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:10:54,737 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:10:54,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 23:10:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:54,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:10:54,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:10:54,924 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 [2021-12-06 23:10:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:10:54,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:10:54,964 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:10:54,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045818911] [2021-12-06 23:10:54,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045818911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:10:54,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:10:54,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:10:54,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385340717] [2021-12-06 23:10:54,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:10:54,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:10:54,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:10:54,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:10:54,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:10:54,966 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:10:55,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:55,320 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2021-12-06 23:10:55,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:10:55,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-06 23:10:55,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:55,322 INFO L225 Difference]: With dead ends: 139 [2021-12-06 23:10:55,323 INFO L226 Difference]: Without dead ends: 139 [2021-12-06 23:10:55,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:10:55,324 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 68 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:55,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 216 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:10:55,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-06 23:10:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 89. [2021-12-06 23:10:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 85 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:10:55,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-12-06 23:10:55,330 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 24 [2021-12-06 23:10:55,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:55,330 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-12-06 23:10:55,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:10:55,330 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-12-06 23:10:55,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 23:10:55,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:55,331 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:55,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 23:10:55,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:10:55,533 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:55,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:55,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1410538017, now seen corresponding path program 1 times [2021-12-06 23:10:55,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:10:55,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462456619] [2021-12-06 23:10:55,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:55,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:10:55,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:10:55,539 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:10:55,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 23:10:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:55,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 23:10:55,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:10:55,677 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 [2021-12-06 23:10:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:10:55,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:10:55,757 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:10:55,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462456619] [2021-12-06 23:10:55,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462456619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:10:55,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:10:55,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:10:55,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811804308] [2021-12-06 23:10:55,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:10:55,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:10:55,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:10:55,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:10:55,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:10:55,759 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:10:56,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:56,113 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2021-12-06 23:10:56,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:10:56,114 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-06 23:10:56,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:56,115 INFO L225 Difference]: With dead ends: 89 [2021-12-06 23:10:56,115 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 23:10:56,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:10:56,116 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 78 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:56,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 206 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:10:56,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 23:10:56,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-12-06 23:10:56,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 47 states have (on average 1.872340425531915) internal successors, (88), 84 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:10:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-12-06 23:10:56,121 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 24 [2021-12-06 23:10:56,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:56,121 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-12-06 23:10:56,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:10:56,121 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-12-06 23:10:56,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 23:10:56,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:56,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:56,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 23:10:56,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:10:56,323 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:56,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:56,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1682632447, now seen corresponding path program 1 times [2021-12-06 23:10:56,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:10:56,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585674638] [2021-12-06 23:10:56,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:56,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:10:56,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:10:56,327 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:10:56,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 23:10:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:56,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 23:10:56,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:10:56,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-12-06 23:10:56,593 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 23:10:56,593 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 [2021-12-06 23:10:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:10:56,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:10:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:10:56,843 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:10:56,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585674638] [2021-12-06 23:10:56,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585674638] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:10:56,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:10:56,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-12-06 23:10:56,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430026744] [2021-12-06 23:10:56,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:10:56,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:10:56,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:10:56,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:10:56,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:10:56,845 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 23:10:57,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:57,196 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2021-12-06 23:10:57,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:10:57,196 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-12-06 23:10:57,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:57,197 INFO L225 Difference]: With dead ends: 144 [2021-12-06 23:10:57,197 INFO L226 Difference]: Without dead ends: 144 [2021-12-06 23:10:57,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:10:57,198 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 53 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:57,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 277 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 259 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2021-12-06 23:10:57,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-06 23:10:57,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 93. [2021-12-06 23:10:57,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 88 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:10:57,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2021-12-06 23:10:57,204 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 26 [2021-12-06 23:10:57,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:57,205 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2021-12-06 23:10:57,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 23:10:57,205 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2021-12-06 23:10:57,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 23:10:57,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:57,205 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:57,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 23:10:57,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:10:57,407 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:10:57,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:57,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1682632446, now seen corresponding path program 1 times [2021-12-06 23:10:57,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:10:57,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914282627] [2021-12-06 23:10:57,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:57,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:10:57,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:10:57,416 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:10:57,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 23:10:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:57,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 23:10:57,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:10:57,540 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 [2021-12-06 23:10:57,545 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 [2021-12-06 23:10:59,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:10:59,783 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 12 treesize of output 14 [2021-12-06 23:10:59,791 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 23:10:59,791 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 19 treesize of output 19 [2021-12-06 23:10:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:10:59,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:11:02,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:11:02,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914282627] [2021-12-06 23:11:02,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914282627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:11:02,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [323511110] [2021-12-06 23:11:02,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:02,050 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 23:11:02,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 23:11:02,051 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 23:11:02,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-12-06 23:11:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:02,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 23:11:02,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:02,229 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 [2021-12-06 23:11:02,234 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 [2021-12-06 23:11:02,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:11:02,421 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 12 treesize of output 14 [2021-12-06 23:11:02,428 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 23:11:02,428 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 19 treesize of output 19 [2021-12-06 23:11:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:11:02,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:11:04,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [323511110] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:11:04,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:11:04,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-06 23:11:04,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394098808] [2021-12-06 23:11:04,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:11:04,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:11:04,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:11:04,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:11:04,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=85, Unknown=2, NotChecked=0, Total=110 [2021-12-06 23:11:04,647 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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) [2021-12-06 23:11:05,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:05,216 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2021-12-06 23:11:05,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 23:11:05,217 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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) Word has length 26 [2021-12-06 23:11:05,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:05,218 INFO L225 Difference]: With dead ends: 95 [2021-12-06 23:11:05,218 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 23:11:05,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=31, Invalid=123, Unknown=2, NotChecked=0, Total=156 [2021-12-06 23:11:05,218 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 3 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:05,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 271 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 285 Invalid, 0 Unknown, 55 Unchecked, 0.5s Time] [2021-12-06 23:11:05,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 23:11:05,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-12-06 23:11:05,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 88 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:11:05,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2021-12-06 23:11:05,223 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 26 [2021-12-06 23:11:05,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:11:05,223 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2021-12-06 23:11:05,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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) [2021-12-06 23:11:05,223 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2021-12-06 23:11:05,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 23:11:05,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:11:05,224 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:11:05,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-06 23:11:05,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-12-06 23:11:05,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 23:11:05,626 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:11:05,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:11:05,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2101924137, now seen corresponding path program 1 times [2021-12-06 23:11:05,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:11:05,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039517927] [2021-12-06 23:11:05,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:05,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:11:05,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:11:05,632 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:11:05,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 23:11:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:05,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:11:05,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:11:05,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:11:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:11:05,811 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:11:05,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039517927] [2021-12-06 23:11:05,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039517927] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:11:05,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:11:05,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-06 23:11:05,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125312236] [2021-12-06 23:11:05,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:11:05,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:11:05,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:11:05,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:11:05,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:11:05,812 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:11:05,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:05,950 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-12-06 23:11:05,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:11:05,950 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-06 23:11:05,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:05,951 INFO L225 Difference]: With dead ends: 94 [2021-12-06 23:11:05,951 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 23:11:05,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:11:05,952 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 4 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:05,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 399 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:11:05,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 23:11:05,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-12-06 23:11:05,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 51 states have (on average 1.803921568627451) internal successors, (92), 88 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:11:05,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2021-12-06 23:11:05,956 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 28 [2021-12-06 23:11:05,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:11:05,956 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2021-12-06 23:11:05,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:11:05,956 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2021-12-06 23:11:05,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 23:11:05,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:11:05,957 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:11:05,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 23:11:06,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:11:06,159 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:11:06,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:11:06,160 INFO L85 PathProgramCache]: Analyzing trace with hash -739919470, now seen corresponding path program 1 times [2021-12-06 23:11:06,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:11:06,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397955666] [2021-12-06 23:11:06,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:06,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:11:06,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:11:06,163 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:11:06,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 23:11:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:06,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 23:11:06,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 23:11:06,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:11:06,346 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 23:11:06,346 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 21 treesize of output 20 [2021-12-06 23:11:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 23:11:06,373 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:11:06,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397955666] [2021-12-06 23:11:06,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397955666] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:11:06,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:11:06,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-12-06 23:11:06,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615093102] [2021-12-06 23:11:06,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:11:06,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:11:06,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:11:06,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:11:06,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:11:06,374 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:11:06,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:06,637 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2021-12-06 23:11:06,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:11:06,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-12-06 23:11:06,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:06,639 INFO L225 Difference]: With dead ends: 147 [2021-12-06 23:11:06,639 INFO L226 Difference]: Without dead ends: 147 [2021-12-06 23:11:06,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:11:06,640 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:06,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 156 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:11:06,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-06 23:11:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 96. [2021-12-06 23:11:06,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 91 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:11:06,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2021-12-06 23:11:06,645 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 29 [2021-12-06 23:11:06,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:11:06,646 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2021-12-06 23:11:06,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:11:06,646 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2021-12-06 23:11:06,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 23:11:06,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:11:06,647 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:11:06,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-06 23:11:06,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:11:06,849 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:11:06,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:11:06,850 INFO L85 PathProgramCache]: Analyzing trace with hash -739919469, now seen corresponding path program 1 times [2021-12-06 23:11:06,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:11:06,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490820659] [2021-12-06 23:11:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:06,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:11:06,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:11:06,856 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:11:06,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 23:11:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:06,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 23:11:06,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:11:07,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:11:07,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:11:07,166 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 22 treesize of output 26 [2021-12-06 23:11:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:11:07,645 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:11:07,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490820659] [2021-12-06 23:11:07,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490820659] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:11:07,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:11:07,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-06 23:11:07,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250740585] [2021-12-06 23:11:07,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:11:07,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:11:07,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:11:07,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:11:07,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:11:07,646 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 23:11:08,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:08,825 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2021-12-06 23:11:08,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:11:08,825 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2021-12-06 23:11:08,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:08,826 INFO L225 Difference]: With dead ends: 160 [2021-12-06 23:11:08,826 INFO L226 Difference]: Without dead ends: 160 [2021-12-06 23:11:08,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:11:08,827 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 200 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:08,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 441 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 23:11:08,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-06 23:11:08,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 96. [2021-12-06 23:11:08,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 91 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:11:08,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2021-12-06 23:11:08,831 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 29 [2021-12-06 23:11:08,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:11:08,831 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2021-12-06 23:11:08,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 23:11:08,831 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2021-12-06 23:11:08,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 23:11:08,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:11:08,832 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:11:08,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-06 23:11:09,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:11:09,033 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:11:09,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:11:09,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1462667085, now seen corresponding path program 1 times [2021-12-06 23:11:09,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:11:09,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288703700] [2021-12-06 23:11:09,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:09,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:11:09,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:11:09,038 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:11:09,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 23:11:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:09,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 23:11:09,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:09,146 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 [2021-12-06 23:11:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:11:09,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:11:09,203 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:11:09,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288703700] [2021-12-06 23:11:09,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288703700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:11:09,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:11:09,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:11:09,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662628571] [2021-12-06 23:11:09,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:11:09,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:11:09,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:11:09,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:11:09,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:11:09,205 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:09,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:09,669 INFO L93 Difference]: Finished difference Result 145 states and 153 transitions. [2021-12-06 23:11:09,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:11:09,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-06 23:11:09,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:09,670 INFO L225 Difference]: With dead ends: 145 [2021-12-06 23:11:09,670 INFO L226 Difference]: Without dead ends: 145 [2021-12-06 23:11:09,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:11:09,671 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 118 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:09,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 241 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 23:11:09,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-06 23:11:09,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 95. [2021-12-06 23:11:09,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 90 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:11:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2021-12-06 23:11:09,675 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 30 [2021-12-06 23:11:09,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:11:09,675 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2021-12-06 23:11:09,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:09,675 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2021-12-06 23:11:09,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 23:11:09,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:11:09,676 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:11:09,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-06 23:11:09,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:11:09,877 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:11:09,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:11:09,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1462667084, now seen corresponding path program 1 times [2021-12-06 23:11:09,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:11:09,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681703343] [2021-12-06 23:11:09,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:09,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:11:09,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:11:09,883 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:11:09,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 23:11:09,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:09,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 23:11:09,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:10,000 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 [2021-12-06 23:11:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:11:10,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:11:10,102 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:11:10,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681703343] [2021-12-06 23:11:10,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681703343] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:11:10,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:11:10,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:11:10,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191028594] [2021-12-06 23:11:10,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:11:10,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:11:10,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:11:10,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:11:10,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:11:10,104 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:10,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:10,593 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-12-06 23:11:10,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:11:10,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-06 23:11:10,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:10,595 INFO L225 Difference]: With dead ends: 94 [2021-12-06 23:11:10,595 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 23:11:10,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:11:10,595 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 138 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:10,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 202 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:11:10,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 23:11:10,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-12-06 23:11:10,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 89 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:11:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2021-12-06 23:11:10,598 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 30 [2021-12-06 23:11:10,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:11:10,598 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2021-12-06 23:11:10,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2021-12-06 23:11:10,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 23:11:10,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:11:10,599 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-12-06 23:11:10,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-06 23:11:10,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:11:10,800 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:11:10,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:11:10,801 INFO L85 PathProgramCache]: Analyzing trace with hash 2100539926, now seen corresponding path program 1 times [2021-12-06 23:11:10,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:11:10,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025413645] [2021-12-06 23:11:10,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:10,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:11:10,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:11:10,805 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:11:10,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 23:11:10,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:11,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 23:11:11,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:11,014 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 [2021-12-06 23:11:11,099 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 23:11:11,100 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 [2021-12-06 23:11:13,192 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 23:11:13,192 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 21 [2021-12-06 23:11:13,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 7 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:11:13,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:11:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:11:15,548 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:11:15,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025413645] [2021-12-06 23:11:15,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025413645] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:11:15,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:11:15,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2021-12-06 23:11:15,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588190378] [2021-12-06 23:11:15,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:11:15,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:11:15,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:11:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:11:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=39, Unknown=1, NotChecked=0, Total=56 [2021-12-06 23:11:15,549 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:15,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:15,790 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2021-12-06 23:11:15,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:11:15,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2021-12-06 23:11:15,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:15,792 INFO L225 Difference]: With dead ends: 133 [2021-12-06 23:11:15,792 INFO L226 Difference]: Without dead ends: 133 [2021-12-06 23:11:15,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 9 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=20, Invalid=51, Unknown=1, NotChecked=0, Total=72 [2021-12-06 23:11:15,792 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 124 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:15,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 128 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 96 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2021-12-06 23:11:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-06 23:11:15,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 93. [2021-12-06 23:11:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 88 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:11:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2021-12-06 23:11:15,795 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 34 [2021-12-06 23:11:15,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:11:15,795 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2021-12-06 23:11:15,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:15,795 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2021-12-06 23:11:15,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 23:11:15,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:11:15,796 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-12-06 23:11:15,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 23:11:15,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:11:15,997 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:11:15,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:11:15,998 INFO L85 PathProgramCache]: Analyzing trace with hash 2100539927, now seen corresponding path program 1 times [2021-12-06 23:11:15,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:11:15,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743107989] [2021-12-06 23:11:16,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:16,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:11:16,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:11:16,002 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:11:16,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 23:11:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:16,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 23:11:16,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:16,195 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 [2021-12-06 23:11:16,200 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 [2021-12-06 23:11:18,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:11:18,299 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 12 treesize of output 14 [2021-12-06 23:11:18,306 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 23:11:18,307 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 [2021-12-06 23:11:18,400 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 23:11:18,400 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 18 [2021-12-06 23:11:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:11:18,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:11:19,107 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:11:19,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743107989] [2021-12-06 23:11:19,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743107989] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:11:19,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [428742388] [2021-12-06 23:11:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:19,108 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 23:11:19,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 23:11:19,109 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 23:11:19,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-12-06 23:11:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:19,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 23:11:19,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:19,345 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 [2021-12-06 23:11:19,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 23:11:21,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:11:21,562 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 12 treesize of output 14 [2021-12-06 23:11:21,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 23:11:21,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:11:21,832 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 12 treesize of output 14 [2021-12-06 23:11:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 23:11:22,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:11:24,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [428742388] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:11:24,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:11:24,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-12-06 23:11:24,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137060188] [2021-12-06 23:11:24,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:11:24,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 23:11:24,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:11:24,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 23:11:24,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=350, Unknown=3, NotChecked=0, Total=420 [2021-12-06 23:11:24,335 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 17 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 23:11:26,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:26,741 INFO L93 Difference]: Finished difference Result 133 states and 150 transitions. [2021-12-06 23:11:26,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 23:11:26,741 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-12-06 23:11:26,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:26,742 INFO L225 Difference]: With dead ends: 133 [2021-12-06 23:11:26,742 INFO L226 Difference]: Without dead ends: 133 [2021-12-06 23:11:26,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=105, Invalid=593, Unknown=4, NotChecked=0, Total=702 [2021-12-06 23:11:26,743 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 19 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:26,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 430 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 209 Unchecked, 0.1s Time] [2021-12-06 23:11:26,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-06 23:11:26,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2021-12-06 23:11:26,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 83 states have (on average 1.5542168674698795) internal successors, (129), 115 states have internal predecessors, (129), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 23:11:26,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2021-12-06 23:11:26,748 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 34 [2021-12-06 23:11:26,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:11:26,748 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2021-12-06 23:11:26,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 23:11:26,748 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2021-12-06 23:11:26,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 23:11:26,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:11:26,749 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-12-06 23:11:26,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-06 23:11:26,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-12-06 23:11:27,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 23:11:27,151 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:11:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:11:27,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2100539922, now seen corresponding path program 1 times [2021-12-06 23:11:27,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:11:27,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654015866] [2021-12-06 23:11:27,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:27,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:11:27,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:11:27,155 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:11:27,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 23:11:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:27,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 23:11:27,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:11:27,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:11:27,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:11:27,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654015866] [2021-12-06 23:11:27,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654015866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:11:27,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:11:27,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:11:27,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566879120] [2021-12-06 23:11:27,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:11:27,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:11:27,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:11:27,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:11:27,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:11:27,327 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:27,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:27,343 INFO L93 Difference]: Finished difference Result 165 states and 178 transitions. [2021-12-06 23:11:27,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:11:27,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2021-12-06 23:11:27,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:27,345 INFO L225 Difference]: With dead ends: 165 [2021-12-06 23:11:27,345 INFO L226 Difference]: Without dead ends: 165 [2021-12-06 23:11:27,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:11:27,346 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 150 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:27,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 161 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:11:27,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-06 23:11:27,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 122. [2021-12-06 23:11:27,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 82 states have (on average 1.524390243902439) internal successors, (125), 114 states have internal predecessors, (125), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 23:11:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 135 transitions. [2021-12-06 23:11:27,350 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 135 transitions. Word has length 34 [2021-12-06 23:11:27,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:11:27,351 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 135 transitions. [2021-12-06 23:11:27,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:27,351 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 135 transitions. [2021-12-06 23:11:27,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 23:11:27,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:11:27,351 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-12-06 23:11:27,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-06 23:11:27,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:11:27,553 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:11:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:11:27,554 INFO L85 PathProgramCache]: Analyzing trace with hash 692228289, now seen corresponding path program 1 times [2021-12-06 23:11:27,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:11:27,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380563938] [2021-12-06 23:11:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:27,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:11:27,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:11:27,558 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:11:27,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 23:11:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:27,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 23:11:27,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:27,695 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 [2021-12-06 23:11:27,783 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 20 [2021-12-06 23:11:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:11:27,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:11:27,796 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:11:27,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380563938] [2021-12-06 23:11:27,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380563938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:11:27,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:11:27,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 23:11:27,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729480688] [2021-12-06 23:11:27,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:11:27,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:11:27,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:11:27,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:11:27,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:11:27,798 INFO L87 Difference]: Start difference. First operand 122 states and 135 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:28,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:28,848 INFO L93 Difference]: Finished difference Result 159 states and 172 transitions. [2021-12-06 23:11:28,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:11:28,849 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2021-12-06 23:11:28,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:28,850 INFO L225 Difference]: With dead ends: 159 [2021-12-06 23:11:28,850 INFO L226 Difference]: Without dead ends: 159 [2021-12-06 23:11:28,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:11:28,851 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 176 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:28,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 366 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 23:11:28,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-06 23:11:28,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 123. [2021-12-06 23:11:28,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 83 states have (on average 1.5301204819277108) internal successors, (127), 115 states have internal predecessors, (127), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 23:11:28,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2021-12-06 23:11:28,855 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 35 [2021-12-06 23:11:28,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:11:28,855 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2021-12-06 23:11:28,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:28,855 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2021-12-06 23:11:28,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 23:11:28,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:11:28,855 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-12-06 23:11:28,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-06 23:11:29,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:11:29,057 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:11:29,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:11:29,058 INFO L85 PathProgramCache]: Analyzing trace with hash 692228290, now seen corresponding path program 1 times [2021-12-06 23:11:29,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:11:29,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538984692] [2021-12-06 23:11:29,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:29,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:11:29,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:11:29,062 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:11:29,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-06 23:11:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:29,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 23:11:29,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:29,303 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 [2021-12-06 23:11:29,475 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 17 treesize of output 9 [2021-12-06 23:11:29,477 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 [2021-12-06 23:11:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:11:29,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:11:29,497 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:11:29,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538984692] [2021-12-06 23:11:29,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538984692] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:11:29,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:11:29,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 23:11:29,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732126777] [2021-12-06 23:11:29,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:11:29,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:11:29,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:11:29,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:11:29,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:11:29,499 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:30,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:30,501 INFO L93 Difference]: Finished difference Result 148 states and 161 transitions. [2021-12-06 23:11:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 23:11:30,502 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2021-12-06 23:11:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:30,503 INFO L225 Difference]: With dead ends: 148 [2021-12-06 23:11:30,503 INFO L226 Difference]: Without dead ends: 148 [2021-12-06 23:11:30,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:11:30,503 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 317 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:30,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 300 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:11:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-06 23:11:30,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 123. [2021-12-06 23:11:30,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 115 states have internal predecessors, (126), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 23:11:30,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2021-12-06 23:11:30,508 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 35 [2021-12-06 23:11:30,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:11:30,508 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2021-12-06 23:11:30,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:30,508 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2021-12-06 23:11:30,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 23:11:30,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:11:30,508 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-12-06 23:11:30,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-06 23:11:30,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:11:30,710 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:11:30,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:11:30,711 INFO L85 PathProgramCache]: Analyzing trace with hash -488544317, now seen corresponding path program 1 times [2021-12-06 23:11:30,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:11:30,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003914959] [2021-12-06 23:11:30,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:30,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:11:30,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:11:30,715 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:11:30,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-06 23:11:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:30,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:11:30,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:11:31,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:11:31,023 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:11:31,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003914959] [2021-12-06 23:11:31,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003914959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:11:31,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:11:31,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:11:31,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465478493] [2021-12-06 23:11:31,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:11:31,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:11:31,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:11:31,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:11:31,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:11:31,024 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:31,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:31,127 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2021-12-06 23:11:31,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:11:31,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2021-12-06 23:11:31,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:31,128 INFO L225 Difference]: With dead ends: 117 [2021-12-06 23:11:31,128 INFO L226 Difference]: Without dead ends: 117 [2021-12-06 23:11:31,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:11:31,129 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 143 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:31,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 97 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:11:31,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-06 23:11:31,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-12-06 23:11:31,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 83 states have (on average 1.4457831325301205) internal successors, (120), 109 states have internal predecessors, (120), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 23:11:31,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2021-12-06 23:11:31,132 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 37 [2021-12-06 23:11:31,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:11:31,132 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2021-12-06 23:11:31,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:31,132 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2021-12-06 23:11:31,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 23:11:31,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:11:31,133 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:11:31,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-06 23:11:31,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:11:31,334 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:11:31,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:11:31,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1420434319, now seen corresponding path program 1 times [2021-12-06 23:11:31,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:11:31,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353363244] [2021-12-06 23:11:31,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:31,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:11:31,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:11:31,339 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:11:31,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-06 23:11:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:31,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 23:11:31,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:31,498 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 [2021-12-06 23:11:31,598 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 20 [2021-12-06 23:11:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:11:31,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:11:31,612 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:11:31,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353363244] [2021-12-06 23:11:31,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353363244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:11:31,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:11:31,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 23:11:31,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444383110] [2021-12-06 23:11:31,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:11:31,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:11:31,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:11:31,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:11:31,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:11:31,614 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:32,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:32,531 INFO L93 Difference]: Finished difference Result 147 states and 160 transitions. [2021-12-06 23:11:32,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:11:32,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-12-06 23:11:32,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:32,532 INFO L225 Difference]: With dead ends: 147 [2021-12-06 23:11:32,532 INFO L226 Difference]: Without dead ends: 147 [2021-12-06 23:11:32,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:11:32,533 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 143 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:32,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 328 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:11:32,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-06 23:11:32,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 122. [2021-12-06 23:11:32,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 88 states have (on average 1.4431818181818181) internal successors, (127), 114 states have internal predecessors, (127), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 23:11:32,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 137 transitions. [2021-12-06 23:11:32,537 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 137 transitions. Word has length 40 [2021-12-06 23:11:32,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:11:32,537 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 137 transitions. [2021-12-06 23:11:32,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:32,537 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 137 transitions. [2021-12-06 23:11:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 23:11:32,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:11:32,538 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:11:32,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-06 23:11:32,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:11:32,739 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:11:32,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:11:32,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1420434320, now seen corresponding path program 1 times [2021-12-06 23:11:32,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:11:32,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951489058] [2021-12-06 23:11:32,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:32,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:11:32,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:11:32,744 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:11:32,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-06 23:11:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:32,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 23:11:32,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:32,902 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 [2021-12-06 23:11:33,105 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 [2021-12-06 23:11:33,108 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 17 treesize of output 9 [2021-12-06 23:11:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:11:33,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:11:33,132 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:11:33,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951489058] [2021-12-06 23:11:33,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951489058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:11:33,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:11:33,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 23:11:33,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012668266] [2021-12-06 23:11:33,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:11:33,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:11:33,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:11:33,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:11:33,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:11:33,133 INFO L87 Difference]: Start difference. First operand 122 states and 137 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:34,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:34,128 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2021-12-06 23:11:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 23:11:34,128 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-12-06 23:11:34,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:34,129 INFO L225 Difference]: With dead ends: 136 [2021-12-06 23:11:34,129 INFO L226 Difference]: Without dead ends: 136 [2021-12-06 23:11:34,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:11:34,130 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 264 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:34,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 300 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:11:34,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-06 23:11:34,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 122. [2021-12-06 23:11:34,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 88 states have (on average 1.4318181818181819) internal successors, (126), 114 states have internal predecessors, (126), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 23:11:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 136 transitions. [2021-12-06 23:11:34,133 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 136 transitions. Word has length 40 [2021-12-06 23:11:34,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:11:34,134 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 136 transitions. [2021-12-06 23:11:34,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:34,134 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 136 transitions. [2021-12-06 23:11:34,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 23:11:34,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:11:34,134 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:11:34,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-06 23:11:34,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:11:34,335 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:11:34,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:11:34,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1420420416, now seen corresponding path program 1 times [2021-12-06 23:11:34,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:11:34,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489251580] [2021-12-06 23:11:34,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:34,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:11:34,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:11:34,341 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:11:34,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-06 23:11:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:34,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 23:11:34,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:34,564 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 [2021-12-06 23:11:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:11:34,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:11:34,573 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:11:34,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489251580] [2021-12-06 23:11:34,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489251580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:11:34,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:11:34,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 23:11:34,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389320072] [2021-12-06 23:11:34,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:11:34,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:11:34,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:11:34,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:11:34,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:11:34,574 INFO L87 Difference]: Start difference. First operand 122 states and 136 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:35,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:35,309 INFO L93 Difference]: Finished difference Result 165 states and 181 transitions. [2021-12-06 23:11:35,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 23:11:35,310 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-12-06 23:11:35,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:35,311 INFO L225 Difference]: With dead ends: 165 [2021-12-06 23:11:35,311 INFO L226 Difference]: Without dead ends: 165 [2021-12-06 23:11:35,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:11:35,311 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 346 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:35,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 379 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 23:11:35,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-06 23:11:35,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 134. [2021-12-06 23:11:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 100 states have (on average 1.47) internal successors, (147), 126 states have internal predecessors, (147), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 23:11:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 157 transitions. [2021-12-06 23:11:35,315 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 157 transitions. Word has length 40 [2021-12-06 23:11:35,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:11:35,315 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 157 transitions. [2021-12-06 23:11:35,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:11:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 157 transitions. [2021-12-06 23:11:35,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 23:11:35,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:11:35,316 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:11:35,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-06 23:11:35,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:11:35,517 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:11:35,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:11:35,518 INFO L85 PathProgramCache]: Analyzing trace with hash 449018579, now seen corresponding path program 1 times [2021-12-06 23:11:35,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:11:35,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831464143] [2021-12-06 23:11:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:35,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:11:35,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:11:35,520 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:11:35,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-06 23:11:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:35,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:11:35,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 23:11:35,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:11:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 23:11:35,769 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:11:35,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831464143] [2021-12-06 23:11:35,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831464143] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:11:35,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:11:35,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-06 23:11:35,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939131472] [2021-12-06 23:11:35,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:11:35,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:11:35,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:11:35,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:11:35,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:11:35,770 INFO L87 Difference]: Start difference. First operand 134 states and 157 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 23:11:35,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:35,783 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2021-12-06 23:11:35,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:11:35,784 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-12-06 23:11:35,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:35,784 INFO L225 Difference]: With dead ends: 92 [2021-12-06 23:11:35,784 INFO L226 Difference]: Without dead ends: 92 [2021-12-06 23:11:35,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:11:35,785 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 108 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:35,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 159 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:11:35,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-06 23:11:35,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-12-06 23:11:35,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 67 states have (on average 1.492537313432836) internal successors, (100), 88 states have internal predecessors, (100), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:11:35,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2021-12-06 23:11:35,787 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 41 [2021-12-06 23:11:35,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:11:35,787 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2021-12-06 23:11:35,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 23:11:35,787 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2021-12-06 23:11:35,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 23:11:35,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:11:35,788 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:11:35,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-06 23:11:35,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:11:35,989 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:11:35,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:11:35,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1083360035, now seen corresponding path program 1 times [2021-12-06 23:11:35,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:11:35,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577494138] [2021-12-06 23:11:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:35,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:11:35,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:11:35,994 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:11:35,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-06 23:11:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:36,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 23:11:36,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:36,813 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 [2021-12-06 23:11:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:11:36,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:11:36,861 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:11:36,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577494138] [2021-12-06 23:11:36,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577494138] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:11:36,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:11:36,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 23:11:36,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47374410] [2021-12-06 23:11:36,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:11:36,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 23:11:36,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:11:36,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 23:11:36,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:11:36,862 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 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) [2021-12-06 23:11:36,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:36,868 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-12-06 23:11:36,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 23:11:36,869 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 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) Word has length 41 [2021-12-06 23:11:36,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:36,869 INFO L225 Difference]: With dead ends: 103 [2021-12-06 23:11:36,870 INFO L226 Difference]: Without dead ends: 103 [2021-12-06 23:11:36,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:11:36,870 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 19 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:36,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 410 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 150 Unchecked, 0.0s Time] [2021-12-06 23:11:36,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-06 23:11:36,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-12-06 23:11:36,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 77 states have (on average 1.4285714285714286) internal successors, (110), 98 states have internal predecessors, (110), 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) [2021-12-06 23:11:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2021-12-06 23:11:36,873 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 41 [2021-12-06 23:11:36,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:11:36,873 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2021-12-06 23:11:36,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 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) [2021-12-06 23:11:36,873 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2021-12-06 23:11:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 23:11:36,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:11:36,873 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:11:36,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-06 23:11:37,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:11:37,075 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-06 23:11:37,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:11:37,076 INFO L85 PathProgramCache]: Analyzing trace with hash -762217872, now seen corresponding path program 1 times [2021-12-06 23:11:37,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:11:37,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574708563] [2021-12-06 23:11:37,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:37,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:11:37,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:11:37,080 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:11:37,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a1ae49-1c42-4a0f-9829-b5ec6b34c5d3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-06 23:11:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:37,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 23:11:37,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:37,337 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 [2021-12-06 23:11:37,442 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 23:11:37,442 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 19 treesize of output 19 [2021-12-06 23:11:37,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-12-06 23:11:37,536 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 14 treesize of output 16 [2021-12-06 23:11:37,616 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 23:11:37,617 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 32 treesize of output 33 [2021-12-06 23:11:37,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:11:37,652 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 35 treesize of output 30 [2021-12-06 23:11:37,815 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 [2021-12-06 23:11:37,897 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 23:11:37,897 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 46 treesize of output 30 [2021-12-06 23:11:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:11:37,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:11:38,183 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 37 treesize of output 29 [2021-12-06 23:12:11,800 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_1459 (_ BitVec 32)) (v_ArrVal_1457 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_1457))) (store .cse2 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) v_ArrVal_1459))))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select .cse1 .cse0) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)))))))))))) (_ bv1 1))))))) is different from false [2021-12-06 23:12:11,835 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_1459 (_ BitVec 32)) (v_ArrVal_1457 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_1457))) (store .cse2 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) v_ArrVal_1459))))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select .cse1 .cse0) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)))))))))))))))))) is different from false [2021-12-06 23:12:11,872 INFO L354 Elim1Store]: treesize reduction 5, result has 91.7 percent of original size [2021-12-06 23:12:11,872 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 82 treesize of output 81 [2021-12-06 23:12:11,892 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_1459 (_ BitVec 32)) (v_ArrVal_1456 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1457 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse2 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_1456) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_1457))) (store .cse2 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) v_ArrVal_1459))))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (= (select (select .cse0 .cse1) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (not (= .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))))) is different from false [2021-12-06 23:12:11,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:12:11,926 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 94 [2021-12-06 23:12:12,886 INFO L354 Elim1Store]: treesize reduction 157, result has 55.3 percent of original size [2021-12-06 23:12:12,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 142728 treesize of output 133772 [2021-12-06 23:12:14,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:12:14,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:12:14,124 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 139929 treesize of output 136775 [2021-12-06 23:12:15,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:12:15,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:12:15,397 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 157893 treesize of output 148805