./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0513.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0513.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 04d059aeaa0029a1f973fa7e6c55cbf404062628 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0513.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 04d059aeaa0029a1f973fa7e6c55cbf404062628 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:06:10,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:06:10,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:06:10,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:06:10,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:06:10,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:06:10,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:06:10,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:06:10,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:06:10,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:06:10,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:06:10,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:06:10,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:06:10,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:06:10,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:06:10,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:06:10,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:06:10,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:06:10,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:06:10,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:06:10,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:06:10,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:06:10,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:06:10,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:06:10,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:06:10,928 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:06:10,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:06:10,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:06:10,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:06:10,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:06:10,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:06:10,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:06:10,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:06:10,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:06:10,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:06:10,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:06:10,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:06:10,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:06:10,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:06:10,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:06:10,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:06:10,941 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 08:06:10,966 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:06:10,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:06:10,968 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:06:10,968 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:06:10,969 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:06:10,969 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:06:10,969 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:06:10,970 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:06:10,970 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:06:10,970 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:06:10,971 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:06:10,971 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:06:10,972 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:06:10,972 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:06:10,972 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:06:10,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 08:06:10,974 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 08:06:10,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:06:10,974 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:06:10,975 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 08:06:10,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:06:10,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:06:10,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:06:10,976 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 08:06:10,977 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 08:06:10,977 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 08:06:10,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:06:10,978 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:06:10,978 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:06:10,978 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:06:10,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:06:10,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:06:10,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:06:10,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:06:10,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:06:10,980 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:06:10,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:06:10,980 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:06:10,980 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:06:10,981 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04d059aeaa0029a1f973fa7e6c55cbf404062628 [2021-10-13 08:06:11,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:06:11,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:06:11,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:06:11,302 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:06:11,302 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:06:11,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety/test-0513.i [2021-10-13 08:06:11,392 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/data/93ce8c764/ec943689183f421d913238fbfb36261b/FLAGc0f096439 [2021-10-13 08:06:12,012 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:06:12,012 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/sv-benchmarks/c/memsafety/test-0513.i [2021-10-13 08:06:12,023 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/data/93ce8c764/ec943689183f421d913238fbfb36261b/FLAGc0f096439 [2021-10-13 08:06:12,292 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/data/93ce8c764/ec943689183f421d913238fbfb36261b [2021-10-13 08:06:12,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:06:12,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:06:12,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:06:12,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:06:12,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:06:12,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:06:12" (1/1) ... [2021-10-13 08:06:12,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2adb0d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:12, skipping insertion in model container [2021-10-13 08:06:12,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:06:12" (1/1) ... [2021-10-13 08:06:12,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:06:12,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:06:12,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:06:12,663 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:06:12,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:06:12,783 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:06:12,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:12 WrapperNode [2021-10-13 08:06:12,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:06:12,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:06:12,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:06:12,786 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:06:12,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:12" (1/1) ... [2021-10-13 08:06:12,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:12" (1/1) ... [2021-10-13 08:06:12,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:06:12,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:06:12,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:06:12,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:06:12,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:12" (1/1) ... [2021-10-13 08:06:12,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:12" (1/1) ... [2021-10-13 08:06:12,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:12" (1/1) ... [2021-10-13 08:06:12,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:12" (1/1) ... [2021-10-13 08:06:12,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:12" (1/1) ... [2021-10-13 08:06:12,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:12" (1/1) ... [2021-10-13 08:06:12,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:12" (1/1) ... [2021-10-13 08:06:12,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:06:12,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:06:12,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:06:12,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:06:12,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:12" (1/1) ... [2021-10-13 08:06:12,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:06:12,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:06:12,919 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:06:12,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:06:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 08:06:12,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 08:06:12,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 08:06:12,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 08:06:12,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:06:12,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 08:06:12,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 08:06:12,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:06:12,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:06:12,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:06:13,704 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:06:13,705 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 08:06:13,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:06:13 BoogieIcfgContainer [2021-10-13 08:06:13,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:06:13,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:06:13,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:06:13,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:06:13,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:06:12" (1/3) ... [2021-10-13 08:06:13,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65167f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:06:13, skipping insertion in model container [2021-10-13 08:06:13,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:12" (2/3) ... [2021-10-13 08:06:13,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65167f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:06:13, skipping insertion in model container [2021-10-13 08:06:13,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:06:13" (3/3) ... [2021-10-13 08:06:13,718 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0513.i [2021-10-13 08:06:13,724 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:06:13,725 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2021-10-13 08:06:13,769 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:06:13,775 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, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 08:06:13,775 INFO L340 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2021-10-13 08:06:13,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 110 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:13,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 08:06:13,798 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:13,799 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 08:06:13,800 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:13,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:13,805 INFO L82 PathProgramCache]: Analyzing trace with hash 7320914, now seen corresponding path program 1 times [2021-10-13 08:06:13,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:06:13,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141899037] [2021-10-13 08:06:13,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:13,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:06:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:13,947 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:06:13,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141899037] [2021-10-13 08:06:13,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141899037] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:13,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:13,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:06:13,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729381465] [2021-10-13 08:06:13,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:06:13,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:06:13,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:06:13,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:06:13,972 INFO L87 Difference]: Start difference. First operand has 111 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 110 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:13,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:13,990 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2021-10-13 08:06:13,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:06:13,992 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 08:06:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:14,001 INFO L225 Difference]: With dead ends: 111 [2021-10-13 08:06:14,001 INFO L226 Difference]: Without dead ends: 110 [2021-10-13 08:06:14,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:06:14,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-13 08:06:14,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-10-13 08:06:14,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 48 states have (on average 2.4583333333333335) internal successors, (118), 109 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:14,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2021-10-13 08:06:14,041 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 4 [2021-10-13 08:06:14,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:14,041 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2021-10-13 08:06:14,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:14,042 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2021-10-13 08:06:14,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 08:06:14,042 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:14,043 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 08:06:14,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:06:14,043 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:14,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:14,044 INFO L82 PathProgramCache]: Analyzing trace with hash 7282819, now seen corresponding path program 1 times [2021-10-13 08:06:14,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:06:14,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415083650] [2021-10-13 08:06:14,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:14,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:06:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:14,094 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:06:14,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415083650] [2021-10-13 08:06:14,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415083650] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:14,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:14,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:06:14,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734690629] [2021-10-13 08:06:14,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:06:14,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:06:14,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:06:14,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:14,098 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:14,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:14,235 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2021-10-13 08:06:14,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:06:14,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 08:06:14,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:14,239 INFO L225 Difference]: With dead ends: 135 [2021-10-13 08:06:14,239 INFO L226 Difference]: Without dead ends: 135 [2021-10-13 08:06:14,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:14,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-13 08:06:14,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 110. [2021-10-13 08:06:14,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 51 states have (on average 2.392156862745098) internal successors, (122), 109 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:14,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2021-10-13 08:06:14,252 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 4 [2021-10-13 08:06:14,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:14,252 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2021-10-13 08:06:14,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:14,253 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2021-10-13 08:06:14,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 08:06:14,253 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:14,253 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 08:06:14,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 08:06:14,254 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:14,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:14,255 INFO L82 PathProgramCache]: Analyzing trace with hash 7282820, now seen corresponding path program 1 times [2021-10-13 08:06:14,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:06:14,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358133854] [2021-10-13 08:06:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:14,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:06:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:14,304 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:06:14,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358133854] [2021-10-13 08:06:14,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358133854] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:14,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:14,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:06:14,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55449115] [2021-10-13 08:06:14,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:06:14,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:06:14,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:06:14,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:14,308 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:14,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:14,396 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2021-10-13 08:06:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:06:14,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 08:06:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:14,398 INFO L225 Difference]: With dead ends: 108 [2021-10-13 08:06:14,398 INFO L226 Difference]: Without dead ends: 108 [2021-10-13 08:06:14,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:14,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-13 08:06:14,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-10-13 08:06:14,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 51 states have (on average 2.3529411764705883) internal successors, (120), 107 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:14,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 120 transitions. [2021-10-13 08:06:14,407 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 120 transitions. Word has length 4 [2021-10-13 08:06:14,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:14,408 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 120 transitions. [2021-10-13 08:06:14,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:14,408 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 120 transitions. [2021-10-13 08:06:14,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 08:06:14,409 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:14,409 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 08:06:14,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 08:06:14,410 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:14,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:14,410 INFO L82 PathProgramCache]: Analyzing trace with hash 225559209, now seen corresponding path program 1 times [2021-10-13 08:06:14,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:06:14,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047351472] [2021-10-13 08:06:14,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:14,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:06:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:14,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:06:14,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047351472] [2021-10-13 08:06:14,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047351472] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:14,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:14,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 08:06:14,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355525660] [2021-10-13 08:06:14,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:06:14,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:06:14,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:06:14,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:14,440 INFO L87 Difference]: Start difference. First operand 108 states and 120 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:14,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:14,533 INFO L93 Difference]: Finished difference Result 149 states and 163 transitions. [2021-10-13 08:06:14,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:06:14,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 08:06:14,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:14,536 INFO L225 Difference]: With dead ends: 149 [2021-10-13 08:06:14,536 INFO L226 Difference]: Without dead ends: 148 [2021-10-13 08:06:14,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:14,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-13 08:06:14,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2021-10-13 08:06:14,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 54 states have (on average 2.2962962962962963) internal successors, (124), 110 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:14,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2021-10-13 08:06:14,545 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 5 [2021-10-13 08:06:14,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:14,546 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2021-10-13 08:06:14,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:14,547 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2021-10-13 08:06:14,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 08:06:14,547 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:14,547 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 08:06:14,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 08:06:14,548 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:14,549 INFO L82 PathProgramCache]: Analyzing trace with hash 225559133, now seen corresponding path program 1 times [2021-10-13 08:06:14,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:06:14,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001530034] [2021-10-13 08:06:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:14,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:06:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:14,595 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:06:14,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001530034] [2021-10-13 08:06:14,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001530034] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:14,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:14,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:06:14,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481110516] [2021-10-13 08:06:14,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:06:14,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:06:14,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:06:14,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:14,599 INFO L87 Difference]: Start difference. First operand 111 states and 124 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:14,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:14,667 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2021-10-13 08:06:14,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:06:14,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 08:06:14,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:14,668 INFO L225 Difference]: With dead ends: 116 [2021-10-13 08:06:14,669 INFO L226 Difference]: Without dead ends: 115 [2021-10-13 08:06:14,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:14,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-13 08:06:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2021-10-13 08:06:14,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 56 states have (on average 2.232142857142857) internal successors, (125), 112 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:14,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2021-10-13 08:06:14,695 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 5 [2021-10-13 08:06:14,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:14,695 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2021-10-13 08:06:14,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:14,696 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2021-10-13 08:06:14,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 08:06:14,696 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:14,696 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:14,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 08:06:14,697 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:14,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:14,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2074891572, now seen corresponding path program 1 times [2021-10-13 08:06:14,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:06:14,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510067463] [2021-10-13 08:06:14,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:14,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:06:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:14,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:06:14,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510067463] [2021-10-13 08:06:14,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510067463] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:14,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:14,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:06:14,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120775841] [2021-10-13 08:06:14,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:06:14,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:06:14,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:06:14,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:14,793 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:14,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:14,929 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2021-10-13 08:06:14,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:06:14,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 08:06:14,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:14,931 INFO L225 Difference]: With dead ends: 109 [2021-10-13 08:06:14,931 INFO L226 Difference]: Without dead ends: 109 [2021-10-13 08:06:14,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-13 08:06:14,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-10-13 08:06:14,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 108 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:14,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2021-10-13 08:06:14,936 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 7 [2021-10-13 08:06:14,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:14,936 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2021-10-13 08:06:14,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:14,936 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2021-10-13 08:06:14,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 08:06:14,937 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:14,937 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:14,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 08:06:14,937 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:14,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:14,938 INFO L82 PathProgramCache]: Analyzing trace with hash -2074891571, now seen corresponding path program 1 times [2021-10-13 08:06:14,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:06:14,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789519701] [2021-10-13 08:06:14,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:14,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:06:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:15,034 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:06:15,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789519701] [2021-10-13 08:06:15,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789519701] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:15,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:15,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:06:15,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995211862] [2021-10-13 08:06:15,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:06:15,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:06:15,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:06:15,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:15,037 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:15,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:15,133 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2021-10-13 08:06:15,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:06:15,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 08:06:15,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:15,143 INFO L225 Difference]: With dead ends: 106 [2021-10-13 08:06:15,143 INFO L226 Difference]: Without dead ends: 106 [2021-10-13 08:06:15,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:15,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-13 08:06:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-10-13 08:06:15,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 56 states have (on average 2.107142857142857) internal successors, (118), 105 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:15,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2021-10-13 08:06:15,147 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 7 [2021-10-13 08:06:15,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:15,147 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2021-10-13 08:06:15,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:15,147 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2021-10-13 08:06:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 08:06:15,148 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:15,148 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:15,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 08:06:15,149 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:15,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:15,149 INFO L82 PathProgramCache]: Analyzing trace with hash -525717927, now seen corresponding path program 1 times [2021-10-13 08:06:15,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:06:15,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113131364] [2021-10-13 08:06:15,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:15,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:06:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:15,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:15,196 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:06:15,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113131364] [2021-10-13 08:06:15,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113131364] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:15,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:15,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 08:06:15,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163795861] [2021-10-13 08:06:15,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:06:15,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:06:15,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:06:15,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:06:15,199 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:15,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:15,298 INFO L93 Difference]: Finished difference Result 190 states and 210 transitions. [2021-10-13 08:06:15,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:06:15,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 08:06:15,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:15,300 INFO L225 Difference]: With dead ends: 190 [2021-10-13 08:06:15,300 INFO L226 Difference]: Without dead ends: 190 [2021-10-13 08:06:15,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:06:15,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-10-13 08:06:15,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 106. [2021-10-13 08:06:15,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 105 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2021-10-13 08:06:15,304 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 12 [2021-10-13 08:06:15,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:15,304 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2021-10-13 08:06:15,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2021-10-13 08:06:15,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 08:06:15,305 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:15,305 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:15,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 08:06:15,306 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:15,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:15,306 INFO L82 PathProgramCache]: Analyzing trace with hash -525718003, now seen corresponding path program 1 times [2021-10-13 08:06:15,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:06:15,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378018616] [2021-10-13 08:06:15,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:15,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:06:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:15,367 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:06:15,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378018616] [2021-10-13 08:06:15,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378018616] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:15,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:15,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:06:15,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988619576] [2021-10-13 08:06:15,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:06:15,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:06:15,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:06:15,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:06:15,369 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:15,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:15,508 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2021-10-13 08:06:15,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:06:15,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 08:06:15,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:15,509 INFO L225 Difference]: With dead ends: 100 [2021-10-13 08:06:15,509 INFO L226 Difference]: Without dead ends: 100 [2021-10-13 08:06:15,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:06:15,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-13 08:06:15,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-10-13 08:06:15,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 98 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:15,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2021-10-13 08:06:15,517 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 12 [2021-10-13 08:06:15,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:15,518 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2021-10-13 08:06:15,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2021-10-13 08:06:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 08:06:15,519 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:15,519 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:15,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 08:06:15,519 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:15,520 INFO L82 PathProgramCache]: Analyzing trace with hash -525718002, now seen corresponding path program 1 times [2021-10-13 08:06:15,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:06:15,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227497916] [2021-10-13 08:06:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:15,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:06:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:15,639 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:06:15,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227497916] [2021-10-13 08:06:15,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227497916] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:15,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:15,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 08:06:15,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950223974] [2021-10-13 08:06:15,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:06:15,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:06:15,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:06:15,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:06:15,642 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:15,852 INFO L93 Difference]: Finished difference Result 167 states and 186 transitions. [2021-10-13 08:06:15,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:06:15,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 08:06:15,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:15,853 INFO L225 Difference]: With dead ends: 167 [2021-10-13 08:06:15,853 INFO L226 Difference]: Without dead ends: 167 [2021-10-13 08:06:15,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:06:15,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-10-13 08:06:15,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 127. [2021-10-13 08:06:15,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 126 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:15,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 170 transitions. [2021-10-13 08:06:15,858 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 170 transitions. Word has length 12 [2021-10-13 08:06:15,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:15,858 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 170 transitions. [2021-10-13 08:06:15,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:15,858 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 170 transitions. [2021-10-13 08:06:15,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 08:06:15,859 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:15,859 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:15,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 08:06:15,859 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:15,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:15,860 INFO L82 PathProgramCache]: Analyzing trace with hash 78541249, now seen corresponding path program 1 times [2021-10-13 08:06:15,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:06:15,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119357439] [2021-10-13 08:06:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:15,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:06:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:15,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:06:15,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119357439] [2021-10-13 08:06:15,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119357439] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:15,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:15,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 08:06:15,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768084008] [2021-10-13 08:06:15,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:06:15,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:06:15,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:06:15,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:06:15,916 INFO L87 Difference]: Start difference. First operand 127 states and 170 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:16,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:16,026 INFO L93 Difference]: Finished difference Result 166 states and 185 transitions. [2021-10-13 08:06:16,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:06:16,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 08:06:16,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:16,028 INFO L225 Difference]: With dead ends: 166 [2021-10-13 08:06:16,028 INFO L226 Difference]: Without dead ends: 166 [2021-10-13 08:06:16,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:06:16,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-13 08:06:16,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 128. [2021-10-13 08:06:16,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 88 states have (on average 1.9431818181818181) internal successors, (171), 127 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:16,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 171 transitions. [2021-10-13 08:06:16,033 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 171 transitions. Word has length 16 [2021-10-13 08:06:16,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:16,033 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 171 transitions. [2021-10-13 08:06:16,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:16,033 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 171 transitions. [2021-10-13 08:06:16,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 08:06:16,034 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:16,034 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:16,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 08:06:16,034 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:16,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:16,035 INFO L82 PathProgramCache]: Analyzing trace with hash 78602504, now seen corresponding path program 1 times [2021-10-13 08:06:16,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:06:16,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522329881] [2021-10-13 08:06:16,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:16,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:06:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:16,154 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:06:16,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522329881] [2021-10-13 08:06:16,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522329881] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:16,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:16,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 08:06:16,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935101133] [2021-10-13 08:06:16,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:06:16,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:06:16,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:06:16,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:06:16,164 INFO L87 Difference]: Start difference. First operand 128 states and 171 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:16,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:16,282 INFO L93 Difference]: Finished difference Result 151 states and 195 transitions. [2021-10-13 08:06:16,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:06:16,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 08:06:16,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:16,288 INFO L225 Difference]: With dead ends: 151 [2021-10-13 08:06:16,288 INFO L226 Difference]: Without dead ends: 151 [2021-10-13 08:06:16,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:06:16,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-10-13 08:06:16,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 134. [2021-10-13 08:06:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 94 states have (on average 1.8936170212765957) internal successors, (178), 133 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 178 transitions. [2021-10-13 08:06:16,293 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 178 transitions. Word has length 16 [2021-10-13 08:06:16,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:16,293 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 178 transitions. [2021-10-13 08:06:16,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:16,293 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 178 transitions. [2021-10-13 08:06:16,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 08:06:16,294 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:16,294 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:16,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-13 08:06:16,295 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:16,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:16,295 INFO L82 PathProgramCache]: Analyzing trace with hash -934620265, now seen corresponding path program 1 times [2021-10-13 08:06:16,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:06:16,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8107563] [2021-10-13 08:06:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:16,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:06:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:16,495 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:06:16,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8107563] [2021-10-13 08:06:16,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8107563] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:16,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:16,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 08:06:16,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904152495] [2021-10-13 08:06:16,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 08:06:16,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:06:16,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 08:06:16,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:06:16,498 INFO L87 Difference]: Start difference. First operand 134 states and 178 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:16,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:16,661 INFO L93 Difference]: Finished difference Result 155 states and 199 transitions. [2021-10-13 08:06:16,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:06:16,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 08:06:16,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:16,662 INFO L225 Difference]: With dead ends: 155 [2021-10-13 08:06:16,662 INFO L226 Difference]: Without dead ends: 155 [2021-10-13 08:06:16,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:06:16,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-10-13 08:06:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 139. [2021-10-13 08:06:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 99 states have (on average 1.8484848484848484) internal successors, (183), 138 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 183 transitions. [2021-10-13 08:06:16,667 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 183 transitions. Word has length 19 [2021-10-13 08:06:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:16,667 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 183 transitions. [2021-10-13 08:06:16,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:16,667 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 183 transitions. [2021-10-13 08:06:16,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 08:06:16,668 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:16,668 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:16,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-13 08:06:16,668 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr56REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:16,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:16,669 INFO L82 PathProgramCache]: Analyzing trace with hash -934621519, now seen corresponding path program 1 times [2021-10-13 08:06:16,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:06:16,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678232196] [2021-10-13 08:06:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:16,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:06:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:16,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:16,845 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:06:16,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678232196] [2021-10-13 08:06:16,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678232196] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:16,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:16,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-13 08:06:16,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779830585] [2021-10-13 08:06:16,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 08:06:16,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:06:16,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 08:06:16,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:06:16,846 INFO L87 Difference]: Start difference. First operand 139 states and 183 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:17,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:17,407 INFO L93 Difference]: Finished difference Result 178 states and 229 transitions. [2021-10-13 08:06:17,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 08:06:17,407 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 08:06:17,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:17,409 INFO L225 Difference]: With dead ends: 178 [2021-10-13 08:06:17,409 INFO L226 Difference]: Without dead ends: 178 [2021-10-13 08:06:17,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-13 08:06:17,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-13 08:06:17,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 140. [2021-10-13 08:06:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 100 states have (on average 1.85) internal successors, (185), 139 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:17,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2021-10-13 08:06:17,423 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 19 [2021-10-13 08:06:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:17,423 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2021-10-13 08:06:17,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:17,424 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2021-10-13 08:06:17,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 08:06:17,425 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:17,425 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:17,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-13 08:06:17,425 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:17,426 INFO L82 PathProgramCache]: Analyzing trace with hash -934621518, now seen corresponding path program 1 times [2021-10-13 08:06:17,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:06:17,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802034173] [2021-10-13 08:06:17,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:17,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:06:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:17,664 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:06:17,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802034173] [2021-10-13 08:06:17,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802034173] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:17,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:17,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 08:06:17,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264884839] [2021-10-13 08:06:17,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 08:06:17,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:06:17,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 08:06:17,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:06:17,668 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:17,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:17,870 INFO L93 Difference]: Finished difference Result 159 states and 203 transitions. [2021-10-13 08:06:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:06:17,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 08:06:17,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:17,872 INFO L225 Difference]: With dead ends: 159 [2021-10-13 08:06:17,872 INFO L226 Difference]: Without dead ends: 159 [2021-10-13 08:06:17,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:06:17,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-10-13 08:06:17,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 140. [2021-10-13 08:06:17,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 100 states have (on average 1.84) internal successors, (184), 139 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:17,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 184 transitions. [2021-10-13 08:06:17,876 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 184 transitions. Word has length 19 [2021-10-13 08:06:17,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:17,877 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 184 transitions. [2021-10-13 08:06:17,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:17,877 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 184 transitions. [2021-10-13 08:06:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 08:06:17,877 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:17,877 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:17,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-13 08:06:17,878 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:17,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:17,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1091504825, now seen corresponding path program 1 times [2021-10-13 08:06:17,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:06:17,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747648209] [2021-10-13 08:06:17,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:17,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:06:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:18,001 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:06:18,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747648209] [2021-10-13 08:06:18,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747648209] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:18,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:18,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 08:06:18,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173436925] [2021-10-13 08:06:18,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:06:18,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:06:18,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:06:18,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:06:18,005 INFO L87 Difference]: Start difference. First operand 140 states and 184 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:18,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:18,231 INFO L93 Difference]: Finished difference Result 182 states and 228 transitions. [2021-10-13 08:06:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 08:06:18,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-13 08:06:18,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:18,233 INFO L225 Difference]: With dead ends: 182 [2021-10-13 08:06:18,233 INFO L226 Difference]: Without dead ends: 182 [2021-10-13 08:06:18,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-10-13 08:06:18,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-13 08:06:18,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 141. [2021-10-13 08:06:18,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 101 states have (on average 1.8316831683168318) internal successors, (185), 140 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:18,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 185 transitions. [2021-10-13 08:06:18,237 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 185 transitions. Word has length 20 [2021-10-13 08:06:18,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:18,238 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 185 transitions. [2021-10-13 08:06:18,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:18,238 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 185 transitions. [2021-10-13 08:06:18,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 08:06:18,238 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:18,239 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:18,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-13 08:06:18,239 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:18,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:18,239 INFO L82 PathProgramCache]: Analyzing trace with hash -523088569, now seen corresponding path program 1 times [2021-10-13 08:06:18,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:06:18,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486765978] [2021-10-13 08:06:18,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:18,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:06:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:18,354 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:06:18,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486765978] [2021-10-13 08:06:18,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486765978] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:18,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:18,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 08:06:18,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286980405] [2021-10-13 08:06:18,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:06:18,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:06:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:06:18,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:06:18,357 INFO L87 Difference]: Start difference. First operand 141 states and 185 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:18,573 INFO L93 Difference]: Finished difference Result 158 states and 202 transitions. [2021-10-13 08:06:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 08:06:18,574 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 08:06:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:18,575 INFO L225 Difference]: With dead ends: 158 [2021-10-13 08:06:18,575 INFO L226 Difference]: Without dead ends: 158 [2021-10-13 08:06:18,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-13 08:06:18,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-13 08:06:18,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 142. [2021-10-13 08:06:18,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 102 states have (on average 1.8235294117647058) internal successors, (186), 141 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:18,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 186 transitions. [2021-10-13 08:06:18,580 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 186 transitions. Word has length 21 [2021-10-13 08:06:18,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:18,580 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 186 transitions. [2021-10-13 08:06:18,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:18,580 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 186 transitions. [2021-10-13 08:06:18,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 08:06:18,581 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:18,581 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:18,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-13 08:06:18,581 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:18,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:18,581 INFO L82 PathProgramCache]: Analyzing trace with hash 964123771, now seen corresponding path program 1 times [2021-10-13 08:06:18,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:06:18,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205287666] [2021-10-13 08:06:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:18,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:06:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:06:18,620 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:06:18,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205287666] [2021-10-13 08:06:18,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205287666] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:18,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:18,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:06:18,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885810694] [2021-10-13 08:06:18,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:06:18,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:06:18,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:06:18,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:06:18,624 INFO L87 Difference]: Start difference. First operand 142 states and 186 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:18,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:18,780 INFO L93 Difference]: Finished difference Result 203 states and 267 transitions. [2021-10-13 08:06:18,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:06:18,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 08:06:18,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:18,782 INFO L225 Difference]: With dead ends: 203 [2021-10-13 08:06:18,782 INFO L226 Difference]: Without dead ends: 203 [2021-10-13 08:06:18,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:06:18,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-10-13 08:06:18,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 146. [2021-10-13 08:06:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 108 states have (on average 1.8240740740740742) internal successors, (197), 145 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:18,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 197 transitions. [2021-10-13 08:06:18,788 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 197 transitions. Word has length 22 [2021-10-13 08:06:18,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:18,788 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 197 transitions. [2021-10-13 08:06:18,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:18,788 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 197 transitions. [2021-10-13 08:06:18,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 08:06:18,791 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:18,791 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:18,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-13 08:06:18,791 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:18,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:18,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1189983836, now seen corresponding path program 1 times [2021-10-13 08:06:18,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:06:18,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956583005] [2021-10-13 08:06:18,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:18,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:06:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:19,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:06:19,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956583005] [2021-10-13 08:06:19,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956583005] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:06:19,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922628828] [2021-10-13 08:06:19,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:19,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:06:19,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:06:19,070 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:06:19,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:06:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:19,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 08:06:19,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:19,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-10-13 08:06:19,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:06:19,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2021-10-13 08:06:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:20,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:20,346 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 64 treesize of output 58 [2021-10-13 08:06:22,659 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_antiDerIndex_entry0_1 Int) (v_arrayElimCell_3 Int)) (let ((.cse1 (store |c_#valid| c_ULTIMATE.start_main_~data~0.base 0)) (.cse0 (select |c_ULTIMATE.start_main_old_#valid| v_antiDerIndex_entry0_1))) (or (and (= c_ULTIMATE.start_main_~lItem~0.base c_ULTIMATE.start_main_~data~0.base) (<= c_ULTIMATE.start_main_~lItem~0.offset 0) (= .cse0 (select (store .cse1 c_ULTIMATE.start_main_~item~0.base 0) v_antiDerIndex_entry0_1)) (<= 0 c_ULTIMATE.start_main_~lItem~0.offset)) (= (select (store .cse1 v_arrayElimCell_3 0) v_antiDerIndex_entry0_1) .cse0)))) (or (< 0 c_ULTIMATE.start_main_~lItem~0.offset) (< c_ULTIMATE.start_main_~lItem~0.offset 0) (forall ((v_antiDerIndex_entry0_1 Int)) (= (select |c_ULTIMATE.start_main_old_#valid| v_antiDerIndex_entry0_1) (select (store (store |c_#valid| c_ULTIMATE.start_main_~data~0.base 0) c_ULTIMATE.start_main_~item~0.base 0) v_antiDerIndex_entry0_1))) (not (= c_ULTIMATE.start_main_~lItem~0.base c_ULTIMATE.start_main_~data~0.base)))) is different from false [2021-10-13 08:06:24,730 WARN L838 $PredicateComparison]: unable to prove that (and (or (forall ((v_antiDerIndex_entry0_1 Int)) (= (select (store (store |c_#valid| c_ULTIMATE.start_main_~lItem~0.base 0) c_ULTIMATE.start_main_~item~0.base 0) v_antiDerIndex_entry0_1) (select |c_ULTIMATE.start_main_old_#valid| v_antiDerIndex_entry0_1))) (< 0 c_ULTIMATE.start_main_~lItem~0.offset) (< c_ULTIMATE.start_main_~lItem~0.offset 0)) (forall ((v_antiDerIndex_entry0_1 Int) (v_arrayElimCell_3 Int)) (let ((.cse0 (store |c_#valid| c_ULTIMATE.start_main_~lItem~0.base 0)) (.cse1 (select |c_ULTIMATE.start_main_old_#valid| v_antiDerIndex_entry0_1))) (or (and (<= c_ULTIMATE.start_main_~lItem~0.offset 0) (= (select (store .cse0 c_ULTIMATE.start_main_~item~0.base 0) v_antiDerIndex_entry0_1) .cse1) (<= 0 c_ULTIMATE.start_main_~lItem~0.offset)) (= (select (store .cse0 v_arrayElimCell_3 0) v_antiDerIndex_entry0_1) .cse1))))) is different from false [2021-10-13 08:06:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:25,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922628828] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:06:25,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [725795455] [2021-10-13 08:06:25,386 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-10-13 08:06:25,386 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:06:25,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:06:25,396 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:06:25,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:06:25,470 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:06:25,472 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:06:25,472 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:06:25,473 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-13 08:06:25,473 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:06:25,474 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:06:25,475 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 08:06:25,476 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-10-13 08:06:25,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:06:25,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:06:25,529 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 08:06:25,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 08:06:25,530 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:06:25,533 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 08:06:25,533 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:06:25,534 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 08:06:25,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 08:06:25,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:06:25,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:06:25,546 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:06:25,547 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-10-13 08:06:25,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 08:06:25,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:95, output treesize:83 [2021-10-13 08:06:25,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:25,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:06:25,776 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_106| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) 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:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) 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) [2021-10-13 08:06:25,781 INFO L168 Benchmark]: Toolchain (without parser) took 13483.06 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 64.3 MB in the beginning and 116.0 MB in the end (delta: -51.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:06:25,781 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 104.9 MB. Free memory is still 81.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:06:25,781 INFO L168 Benchmark]: CACSL2BoogieTranslator took 486.64 ms. Allocated memory is still 104.9 MB. Free memory was 64.1 MB in the beginning and 71.3 MB in the end (delta: -7.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:06:25,782 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.33 ms. Allocated memory is still 104.9 MB. Free memory was 71.1 MB in the beginning and 69.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:06:25,782 INFO L168 Benchmark]: Boogie Preprocessor took 37.50 ms. Allocated memory is still 104.9 MB. Free memory was 69.0 MB in the beginning and 67.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:06:25,782 INFO L168 Benchmark]: RCFGBuilder took 820.63 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 67.1 MB in the beginning and 99.7 MB in the end (delta: -32.6 MB). Peak memory consumption was 34.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:06:25,783 INFO L168 Benchmark]: TraceAbstraction took 12070.20 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 99.7 MB in the beginning and 116.0 MB in the end (delta: -16.3 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:06:25,785 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 104.9 MB. Free memory is still 81.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 486.64 ms. Allocated memory is still 104.9 MB. Free memory was 64.1 MB in the beginning and 71.3 MB in the end (delta: -7.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.33 ms. Allocated memory is still 104.9 MB. Free memory was 71.1 MB in the beginning and 69.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.50 ms. Allocated memory is still 104.9 MB. Free memory was 69.0 MB in the beginning and 67.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 820.63 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 67.1 MB in the beginning and 99.7 MB in the end (delta: -32.6 MB). Peak memory consumption was 34.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12070.20 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 99.7 MB in the beginning and 116.0 MB in the end (delta: -16.3 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_106| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_106|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 08:06:25,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:06:28,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:06:28,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:06:28,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:06:28,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:06:28,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:06:28,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:06:28,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:06:28,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:06:28,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:06:28,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:06:28,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:06:28,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:06:28,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:06:28,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:06:28,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:06:28,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:06:28,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:06:28,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:06:28,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:06:28,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:06:28,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:06:28,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:06:28,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:06:28,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:06:28,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:06:28,397 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:06:28,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:06:28,400 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:06:28,401 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:06:28,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:06:28,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:06:28,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:06:28,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:06:28,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:06:28,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:06:28,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:06:28,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:06:28,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:06:28,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:06:28,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:06:28,414 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-13 08:06:28,463 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:06:28,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:06:28,464 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:06:28,465 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:06:28,465 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:06:28,465 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:06:28,466 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:06:28,466 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:06:28,466 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:06:28,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 08:06:28,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 08:06:28,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:06:28,469 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:06:28,470 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 08:06:28,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:06:28,470 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:06:28,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:06:28,471 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 08:06:28,471 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 08:06:28,471 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 08:06:28,471 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:06:28,472 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:06:28,472 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:06:28,472 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:06:28,472 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:06:28,473 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:06:28,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:06:28,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:06:28,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:06:28,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:06:28,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:06:28,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:06:28,475 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:06:28,475 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:06:28,475 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:06:28,475 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:06:28,476 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_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04d059aeaa0029a1f973fa7e6c55cbf404062628 [2021-10-13 08:06:28,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:06:28,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:06:28,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:06:28,871 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:06:28,872 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:06:28,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety/test-0513.i [2021-10-13 08:06:28,950 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/data/bdd4c3fba/789212369c304f03a769c4b5aaa8520c/FLAGf8828be1b [2021-10-13 08:06:29,619 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:06:29,624 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/sv-benchmarks/c/memsafety/test-0513.i [2021-10-13 08:06:29,646 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/data/bdd4c3fba/789212369c304f03a769c4b5aaa8520c/FLAGf8828be1b [2021-10-13 08:06:29,660 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/data/bdd4c3fba/789212369c304f03a769c4b5aaa8520c [2021-10-13 08:06:29,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:06:29,664 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:06:29,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:06:29,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:06:29,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:06:29,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:06:29" (1/1) ... [2021-10-13 08:06:29,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ea548be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:29, skipping insertion in model container [2021-10-13 08:06:29,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:06:29" (1/1) ... [2021-10-13 08:06:29,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:06:29,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:06:30,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:06:30,250 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:06:30,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:06:30,372 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:06:30,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:30 WrapperNode [2021-10-13 08:06:30,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:06:30,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:06:30,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:06:30,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:06:30,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:30" (1/1) ... [2021-10-13 08:06:30,428 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:30" (1/1) ... [2021-10-13 08:06:30,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:06:30,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:06:30,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:06:30,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:06:30,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:30" (1/1) ... [2021-10-13 08:06:30,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:30" (1/1) ... [2021-10-13 08:06:30,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:30" (1/1) ... [2021-10-13 08:06:30,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:30" (1/1) ... [2021-10-13 08:06:30,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:30" (1/1) ... [2021-10-13 08:06:30,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:30" (1/1) ... [2021-10-13 08:06:30,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:30" (1/1) ... [2021-10-13 08:06:30,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:06:30,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:06:30,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:06:30,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:06:30,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:30" (1/1) ... [2021-10-13 08:06:30,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:06:30,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:06:30,578 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:06:30,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:06:30,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 08:06:30,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 08:06:30,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 08:06:30,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:06:30,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 08:06:30,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 08:06:30,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 08:06:30,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 08:06:30,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:06:30,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:06:31,471 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:06:31,471 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 08:06:31,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:06:31 BoogieIcfgContainer [2021-10-13 08:06:31,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:06:31,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:06:31,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:06:31,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:06:31,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:06:29" (1/3) ... [2021-10-13 08:06:31,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a8aebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:06:31, skipping insertion in model container [2021-10-13 08:06:31,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:30" (2/3) ... [2021-10-13 08:06:31,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a8aebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:06:31, skipping insertion in model container [2021-10-13 08:06:31,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:06:31" (3/3) ... [2021-10-13 08:06:31,487 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0513.i [2021-10-13 08:06:31,493 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:06:31,493 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2021-10-13 08:06:31,553 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:06:31,559 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, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 08:06:31,560 INFO L340 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2021-10-13 08:06:31,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 130 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 129 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:31,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 08:06:31,582 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:31,583 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 08:06:31,583 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:31,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:31,588 INFO L82 PathProgramCache]: Analyzing trace with hash 28738657, now seen corresponding path program 1 times [2021-10-13 08:06:31,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:06:31,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246280299] [2021-10-13 08:06:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:31,603 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:06:31,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:06:31,608 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:06:31,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:06:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:31,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 08:06:31,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:31,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:31,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:31,763 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:06:31,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246280299] [2021-10-13 08:06:31,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246280299] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:31,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:31,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:06:31,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083797662] [2021-10-13 08:06:31,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:06:31,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:06:31,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:06:31,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:06:31,812 INFO L87 Difference]: Start difference. First operand has 130 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 129 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:31,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:31,851 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2021-10-13 08:06:31,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:06:31,853 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 08:06:31,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:31,863 INFO L225 Difference]: With dead ends: 130 [2021-10-13 08:06:31,868 INFO L226 Difference]: Without dead ends: 128 [2021-10-13 08:06:31,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:06:31,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-13 08:06:31,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-10-13 08:06:31,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 127 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:31,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2021-10-13 08:06:31,944 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 5 [2021-10-13 08:06:31,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:31,946 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2021-10-13 08:06:31,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:31,947 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2021-10-13 08:06:31,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 08:06:31,960 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:31,960 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 08:06:31,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:32,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:06:32,161 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:32,162 INFO L82 PathProgramCache]: Analyzing trace with hash 28699256, now seen corresponding path program 1 times [2021-10-13 08:06:32,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:06:32,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159166337] [2021-10-13 08:06:32,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:32,163 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:06:32,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:06:32,164 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:06:32,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:06:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:32,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:06:32,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:32,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:32,275 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:06:32,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159166337] [2021-10-13 08:06:32,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159166337] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:32,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:32,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:06:32,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251429204] [2021-10-13 08:06:32,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:06:32,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:06:32,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:06:32,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:32,280 INFO L87 Difference]: Start difference. First operand 128 states and 136 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:32,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:32,602 INFO L93 Difference]: Finished difference Result 173 states and 183 transitions. [2021-10-13 08:06:32,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:06:32,603 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 08:06:32,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:32,606 INFO L225 Difference]: With dead ends: 173 [2021-10-13 08:06:32,606 INFO L226 Difference]: Without dead ends: 172 [2021-10-13 08:06:32,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:32,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-13 08:06:32,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 130. [2021-10-13 08:06:32,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 129 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:32,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 139 transitions. [2021-10-13 08:06:32,621 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 139 transitions. Word has length 5 [2021-10-13 08:06:32,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:32,622 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 139 transitions. [2021-10-13 08:06:32,622 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 139 transitions. [2021-10-13 08:06:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 08:06:32,623 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:32,623 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 08:06:32,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:32,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:06:32,834 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:32,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:32,835 INFO L82 PathProgramCache]: Analyzing trace with hash 28699180, now seen corresponding path program 1 times [2021-10-13 08:06:32,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:06:32,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763806449] [2021-10-13 08:06:32,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:32,837 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:06:32,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:06:32,838 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:06:32,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:06:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:32,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:06:32,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:32,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:32,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:33,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:06:33,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763806449] [2021-10-13 08:06:33,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763806449] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:33,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:33,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 08:06:33,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552371512] [2021-10-13 08:06:33,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:06:33,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:06:33,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:06:33,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:33,037 INFO L87 Difference]: Start difference. First operand 130 states and 139 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:33,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:33,186 INFO L93 Difference]: Finished difference Result 141 states and 148 transitions. [2021-10-13 08:06:33,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:06:33,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 08:06:33,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:33,191 INFO L225 Difference]: With dead ends: 141 [2021-10-13 08:06:33,191 INFO L226 Difference]: Without dead ends: 140 [2021-10-13 08:06:33,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:33,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-13 08:06:33,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2021-10-13 08:06:33,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 133 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:33,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 146 transitions. [2021-10-13 08:06:33,217 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 146 transitions. Word has length 5 [2021-10-13 08:06:33,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:33,217 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 146 transitions. [2021-10-13 08:06:33,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:33,218 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 146 transitions. [2021-10-13 08:06:33,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 08:06:33,218 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:33,218 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 08:06:33,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:33,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:06:33,419 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:33,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:33,420 INFO L82 PathProgramCache]: Analyzing trace with hash 28699819, now seen corresponding path program 1 times [2021-10-13 08:06:33,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:06:33,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379299858] [2021-10-13 08:06:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:33,421 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:06:33,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:06:33,422 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:06:33,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 08:06:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:33,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:06:33,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:33,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:06:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:33,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:33,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:06:33,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379299858] [2021-10-13 08:06:33,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379299858] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:33,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:33,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:06:33,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747343090] [2021-10-13 08:06:33,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:06:33,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:06:33,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:06:33,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:33,579 INFO L87 Difference]: Start difference. First operand 134 states and 146 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:33,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:33,881 INFO L93 Difference]: Finished difference Result 165 states and 179 transitions. [2021-10-13 08:06:33,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:06:33,882 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 08:06:33,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:33,885 INFO L225 Difference]: With dead ends: 165 [2021-10-13 08:06:33,885 INFO L226 Difference]: Without dead ends: 165 [2021-10-13 08:06:33,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:33,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-10-13 08:06:33,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 135. [2021-10-13 08:06:33,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 134 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 149 transitions. [2021-10-13 08:06:33,895 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 149 transitions. Word has length 5 [2021-10-13 08:06:33,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:33,895 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 149 transitions. [2021-10-13 08:06:33,896 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:33,896 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 149 transitions. [2021-10-13 08:06:33,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 08:06:33,896 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:33,896 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 08:06:33,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:34,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:06:34,107 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:34,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:34,107 INFO L82 PathProgramCache]: Analyzing trace with hash 28699820, now seen corresponding path program 1 times [2021-10-13 08:06:34,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:06:34,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280964809] [2021-10-13 08:06:34,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:34,108 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:06:34,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:06:34,111 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:06:34,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 08:06:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:34,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:06:34,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:34,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:06:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:34,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:34,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:06:34,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280964809] [2021-10-13 08:06:34,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280964809] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:34,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:34,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 08:06:34,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577525048] [2021-10-13 08:06:34,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:06:34,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:06:34,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:06:34,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:06:34,306 INFO L87 Difference]: Start difference. First operand 135 states and 149 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:34,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:34,764 INFO L93 Difference]: Finished difference Result 133 states and 145 transitions. [2021-10-13 08:06:34,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:06:34,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 08:06:34,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:34,766 INFO L225 Difference]: With dead ends: 133 [2021-10-13 08:06:34,766 INFO L226 Difference]: Without dead ends: 133 [2021-10-13 08:06:34,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:06:34,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-13 08:06:34,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-10-13 08:06:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 76 states have (on average 1.9078947368421053) internal successors, (145), 132 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:34,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2021-10-13 08:06:34,773 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 5 [2021-10-13 08:06:34,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:34,773 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2021-10-13 08:06:34,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:34,774 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2021-10-13 08:06:34,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 08:06:34,774 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:34,774 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:34,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-13 08:06:34,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:06:34,985 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:34,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:34,986 INFO L82 PathProgramCache]: Analyzing trace with hash 642085487, now seen corresponding path program 1 times [2021-10-13 08:06:34,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:06:34,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501291562] [2021-10-13 08:06:34,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:34,987 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:06:34,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:06:34,988 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:06:34,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 08:06:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:35,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:06:35,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:35,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:06:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:35,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:35,117 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:06:35,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501291562] [2021-10-13 08:06:35,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501291562] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:35,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:35,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:06:35,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325370366] [2021-10-13 08:06:35,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:06:35,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:06:35,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:06:35,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:35,120 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:35,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:35,331 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2021-10-13 08:06:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:06:35,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 08:06:35,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:35,332 INFO L225 Difference]: With dead ends: 129 [2021-10-13 08:06:35,332 INFO L226 Difference]: Without dead ends: 129 [2021-10-13 08:06:35,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:06:35,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-13 08:06:35,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-10-13 08:06:35,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 76 states have (on average 1.855263157894737) internal successors, (141), 128 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 141 transitions. [2021-10-13 08:06:35,338 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 141 transitions. Word has length 9 [2021-10-13 08:06:35,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:35,338 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 141 transitions. [2021-10-13 08:06:35,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:35,339 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 141 transitions. [2021-10-13 08:06:35,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 08:06:35,339 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:35,339 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:35,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:35,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:06:35,540 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:35,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:35,541 INFO L82 PathProgramCache]: Analyzing trace with hash 642085488, now seen corresponding path program 1 times [2021-10-13 08:06:35,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:06:35,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651383270] [2021-10-13 08:06:35,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:35,541 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:06:35,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:06:35,542 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:06:35,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 08:06:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:35,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:06:35,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:35,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:06:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:35,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:35,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:06:35,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651383270] [2021-10-13 08:06:35,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651383270] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:35,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:35,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 08:06:35,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065008443] [2021-10-13 08:06:35,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:06:35,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:06:35,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:06:35,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:06:35,763 INFO L87 Difference]: Start difference. First operand 129 states and 141 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:36,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:36,246 INFO L93 Difference]: Finished difference Result 169 states and 182 transitions. [2021-10-13 08:06:36,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:06:36,247 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 08:06:36,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:36,249 INFO L225 Difference]: With dead ends: 169 [2021-10-13 08:06:36,249 INFO L226 Difference]: Without dead ends: 169 [2021-10-13 08:06:36,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:06:36,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-13 08:06:36,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2021-10-13 08:06:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 76 states have (on average 1.8157894736842106) internal successors, (138), 125 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:36,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 138 transitions. [2021-10-13 08:06:36,254 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 138 transitions. Word has length 9 [2021-10-13 08:06:36,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:36,254 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 138 transitions. [2021-10-13 08:06:36,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:36,254 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 138 transitions. [2021-10-13 08:06:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 08:06:36,255 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:36,255 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:36,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:36,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:06:36,466 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:36,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:36,466 INFO L82 PathProgramCache]: Analyzing trace with hash 734390075, now seen corresponding path program 1 times [2021-10-13 08:06:36,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:06:36,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848535486] [2021-10-13 08:06:36,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:36,467 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:06:36,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:06:36,469 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:06:36,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 08:06:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:36,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:06:36,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:36,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:36,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:36,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:06:36,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848535486] [2021-10-13 08:06:36,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848535486] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:36,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:36,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 08:06:36,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479023064] [2021-10-13 08:06:36,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:06:36,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:06:36,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:06:36,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:06:36,692 INFO L87 Difference]: Start difference. First operand 126 states and 138 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:36,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:36,916 INFO L93 Difference]: Finished difference Result 224 states and 244 transitions. [2021-10-13 08:06:36,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:06:36,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 08:06:36,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:36,918 INFO L225 Difference]: With dead ends: 224 [2021-10-13 08:06:36,918 INFO L226 Difference]: Without dead ends: 224 [2021-10-13 08:06:36,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:06:36,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-10-13 08:06:36,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 126. [2021-10-13 08:06:36,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 76 states have (on average 1.7894736842105263) internal successors, (136), 125 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2021-10-13 08:06:36,924 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 15 [2021-10-13 08:06:36,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:36,925 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2021-10-13 08:06:36,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:36,925 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2021-10-13 08:06:36,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 08:06:36,926 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:36,926 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:36,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-13 08:06:37,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:06:37,137 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:37,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:37,138 INFO L82 PathProgramCache]: Analyzing trace with hash 734389999, now seen corresponding path program 1 times [2021-10-13 08:06:37,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:06:37,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43217334] [2021-10-13 08:06:37,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:37,139 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:06:37,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:06:37,140 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:06:37,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 08:06:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:37,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:06:37,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:37,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:06:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:37,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:37,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:06:37,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43217334] [2021-10-13 08:06:37,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43217334] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:37,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:37,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 08:06:37,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68955800] [2021-10-13 08:06:37,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:06:37,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:06:37,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:06:37,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:06:37,366 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:37,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:37,708 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2021-10-13 08:06:37,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:06:37,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 08:06:37,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:37,710 INFO L225 Difference]: With dead ends: 120 [2021-10-13 08:06:37,710 INFO L226 Difference]: Without dead ends: 120 [2021-10-13 08:06:37,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:06:37,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-13 08:06:37,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-10-13 08:06:37,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 77 states have (on average 1.6883116883116882) internal successors, (130), 118 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:37,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2021-10-13 08:06:37,714 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 15 [2021-10-13 08:06:37,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:37,715 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2021-10-13 08:06:37,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:37,715 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2021-10-13 08:06:37,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 08:06:37,715 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:37,716 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:37,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:37,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:06:37,916 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:37,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:37,917 INFO L82 PathProgramCache]: Analyzing trace with hash 734390000, now seen corresponding path program 1 times [2021-10-13 08:06:37,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:06:37,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441910618] [2021-10-13 08:06:37,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:37,917 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:06:37,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:06:37,918 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:06:37,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 08:06:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:38,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:06:38,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:38,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:06:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:38,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:38,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:06:38,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441910618] [2021-10-13 08:06:38,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441910618] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:38,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:38,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 08:06:38,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063216964] [2021-10-13 08:06:38,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:06:38,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:06:38,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:06:38,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:06:38,322 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:39,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:39,262 INFO L93 Difference]: Finished difference Result 196 states and 215 transitions. [2021-10-13 08:06:39,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 08:06:39,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 08:06:39,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:39,265 INFO L225 Difference]: With dead ends: 196 [2021-10-13 08:06:39,265 INFO L226 Difference]: Without dead ends: 196 [2021-10-13 08:06:39,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:06:39,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-10-13 08:06:39,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 118. [2021-10-13 08:06:39,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 82 states have (on average 1.5731707317073171) internal successors, (129), 117 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:39,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 129 transitions. [2021-10-13 08:06:39,269 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 129 transitions. Word has length 15 [2021-10-13 08:06:39,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:39,270 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 129 transitions. [2021-10-13 08:06:39,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:39,270 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 129 transitions. [2021-10-13 08:06:39,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 08:06:39,271 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:39,271 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:39,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:39,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:06:39,471 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:39,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:39,472 INFO L82 PathProgramCache]: Analyzing trace with hash 2081116792, now seen corresponding path program 1 times [2021-10-13 08:06:39,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:06:39,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579768081] [2021-10-13 08:06:39,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:39,472 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:06:39,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:06:39,473 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:06:39,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 08:06:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:39,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:06:39,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:39,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:40,085 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:06:40,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579768081] [2021-10-13 08:06:40,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579768081] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:40,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:40,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 7 [2021-10-13 08:06:40,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807801558] [2021-10-13 08:06:40,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:06:40,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:06:40,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:06:40,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:06:40,087 INFO L87 Difference]: Start difference. First operand 118 states and 129 transitions. Second operand has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:40,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:40,383 INFO L93 Difference]: Finished difference Result 180 states and 199 transitions. [2021-10-13 08:06:40,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:06:40,385 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-13 08:06:40,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:40,387 INFO L225 Difference]: With dead ends: 180 [2021-10-13 08:06:40,387 INFO L226 Difference]: Without dead ends: 180 [2021-10-13 08:06:40,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:06:40,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-10-13 08:06:40,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2021-10-13 08:06:40,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 83 states have (on average 1.5662650602409638) internal successors, (130), 118 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:40,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2021-10-13 08:06:40,392 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 20 [2021-10-13 08:06:40,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:40,392 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2021-10-13 08:06:40,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:40,393 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2021-10-13 08:06:40,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 08:06:40,394 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:40,394 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:40,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:40,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:06:40,606 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:40,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:40,606 INFO L82 PathProgramCache]: Analyzing trace with hash 2079977757, now seen corresponding path program 1 times [2021-10-13 08:06:40,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:06:40,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565637611] [2021-10-13 08:06:40,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:40,607 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:06:40,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:06:40,608 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:06:40,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 08:06:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:40,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 08:06:40,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:40,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:06:40,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:06:40,908 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-13 08:06:40,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 08:06:41,009 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 24 treesize of output 16 [2021-10-13 08:06:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:41,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:43,202 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 26 [2021-10-13 08:06:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:43,252 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:06:43,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565637611] [2021-10-13 08:06:43,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [565637611] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:43,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:43,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-13 08:06:43,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270541266] [2021-10-13 08:06:43,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 08:06:43,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:06:43,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 08:06:43,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=63, Unknown=1, NotChecked=0, Total=90 [2021-10-13 08:06:43,255 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:46,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:46,943 INFO L93 Difference]: Finished difference Result 144 states and 157 transitions. [2021-10-13 08:06:46,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 08:06:46,944 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-13 08:06:46,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:46,945 INFO L225 Difference]: With dead ends: 144 [2021-10-13 08:06:46,945 INFO L226 Difference]: Without dead ends: 144 [2021-10-13 08:06:46,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4272.0ms TimeCoverageRelationStatistics Valid=49, Invalid=132, Unknown=1, NotChecked=0, Total=182 [2021-10-13 08:06:46,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-13 08:06:46,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 129. [2021-10-13 08:06:46,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 93 states have (on average 1.5376344086021505) internal successors, (143), 128 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:46,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2021-10-13 08:06:46,949 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 20 [2021-10-13 08:06:46,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:46,949 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2021-10-13 08:06:46,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:46,950 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2021-10-13 08:06:46,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 08:06:46,950 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:46,950 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:46,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:47,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:06:47,151 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:47,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:47,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2079977758, now seen corresponding path program 1 times [2021-10-13 08:06:47,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:06:47,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619452092] [2021-10-13 08:06:47,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:47,152 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:06:47,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:06:47,154 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:06:47,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 08:06:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:47,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:06:47,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:47,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:06:47,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:06:47,515 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 19 treesize of output 18 [2021-10-13 08:06:47,524 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 19 treesize of output 18 [2021-10-13 08:06:47,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:06:47,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2021-10-13 08:06:47,631 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 08:06:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:47,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:47,961 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 13 [2021-10-13 08:06:47,972 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 13 [2021-10-13 08:06:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:47,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:06:47,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619452092] [2021-10-13 08:06:47,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619452092] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:47,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:47,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2021-10-13 08:06:47,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478672464] [2021-10-13 08:06:47,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 08:06:47,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:06:47,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 08:06:47,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-13 08:06:47,990 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:48,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:06:48,875 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2021-10-13 08:06:48,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:06:48,875 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-13 08:06:48,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:06:48,876 INFO L225 Difference]: With dead ends: 146 [2021-10-13 08:06:48,877 INFO L226 Difference]: Without dead ends: 146 [2021-10-13 08:06:48,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 381.7ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-10-13 08:06:48,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-13 08:06:48,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 125. [2021-10-13 08:06:48,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 89 states have (on average 1.5393258426966292) internal successors, (137), 124 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2021-10-13 08:06:48,883 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 20 [2021-10-13 08:06:48,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:06:48,883 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2021-10-13 08:06:48,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:06:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2021-10-13 08:06:48,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 08:06:48,885 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:06:48,885 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:06:48,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 08:06:49,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:06:49,092 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr56REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:06:49,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:06:49,092 INFO L82 PathProgramCache]: Analyzing trace with hash 697636568, now seen corresponding path program 1 times [2021-10-13 08:06:49,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:06:49,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550984381] [2021-10-13 08:06:49,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:06:49,093 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:06:49,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:06:49,094 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:06:49,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 08:06:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:06:49,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 08:06:49,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:06:49,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:06:49,384 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 08:06:49,385 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 25 treesize of output 32 [2021-10-13 08:06:49,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-10-13 08:06:49,756 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 32 treesize of output 20 [2021-10-13 08:06:49,903 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-10-13 08:06:49,904 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 39 treesize of output 42 [2021-10-13 08:06:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:49,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:06:52,144 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 60 treesize of output 54 [2021-10-13 08:06:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:06:56,349 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:06:56,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550984381] [2021-10-13 08:06:56,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550984381] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:06:56,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:06:56,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 13 [2021-10-13 08:06:56,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390622572] [2021-10-13 08:06:56,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 08:06:56,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:06:56,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 08:06:56,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=136, Unknown=3, NotChecked=0, Total=182 [2021-10-13 08:06:56,351 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:07:41,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:07:41,984 INFO L93 Difference]: Finished difference Result 184 states and 196 transitions. [2021-10-13 08:07:41,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 08:07:41,985 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-13 08:07:41,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:07:41,986 INFO L225 Difference]: With dead ends: 184 [2021-10-13 08:07:41,986 INFO L226 Difference]: Without dead ends: 184 [2021-10-13 08:07:41,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 18667.5ms TimeCoverageRelationStatistics Valid=91, Invalid=284, Unknown=5, NotChecked=0, Total=380 [2021-10-13 08:07:41,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-10-13 08:07:41,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 128. [2021-10-13 08:07:41,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 92 states have (on average 1.5434782608695652) internal successors, (142), 127 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:07:41,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 142 transitions. [2021-10-13 08:07:41,992 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 142 transitions. Word has length 23 [2021-10-13 08:07:41,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:07:41,993 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 142 transitions. [2021-10-13 08:07:41,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:07:41,993 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 142 transitions. [2021-10-13 08:07:41,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 08:07:41,994 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:07:41,994 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:07:42,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 08:07:42,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:07:42,195 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:07:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:07:42,195 INFO L82 PathProgramCache]: Analyzing trace with hash 697636569, now seen corresponding path program 1 times [2021-10-13 08:07:42,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:07:42,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110227919] [2021-10-13 08:07:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:07:42,196 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:07:42,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:07:42,197 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:07:42,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 08:07:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:07:42,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 08:07:42,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:07:42,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:07:42,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:07:42,532 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:07:42,533 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 15 treesize of output 15 [2021-10-13 08:07:42,548 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 [2021-10-13 08:07:42,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:07:42,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 08:07:42,945 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 44 treesize of output 32 [2021-10-13 08:07:42,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-13 08:07:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:07:43,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:07:43,531 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 78 treesize of output 72 [2021-10-13 08:07:43,536 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 118 treesize of output 106 [2021-10-13 08:07:43,856 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 48 treesize of output 36 [2021-10-13 08:07:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:07:50,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:07:50,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110227919] [2021-10-13 08:07:50,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110227919] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:07:50,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:07:50,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 12 [2021-10-13 08:07:50,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286232989] [2021-10-13 08:07:50,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 08:07:50,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:07:50,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 08:07:50,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=116, Unknown=2, NotChecked=0, Total=156 [2021-10-13 08:07:50,813 INFO L87 Difference]: Start difference. First operand 128 states and 142 transitions. Second operand has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:03,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:03,740 INFO L93 Difference]: Finished difference Result 157 states and 171 transitions. [2021-10-13 08:08:03,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 08:08:03,741 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-13 08:08:03,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:03,742 INFO L225 Difference]: With dead ends: 157 [2021-10-13 08:08:03,742 INFO L226 Difference]: Without dead ends: 157 [2021-10-13 08:08:03,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 17695.5ms TimeCoverageRelationStatistics Valid=126, Invalid=333, Unknown=3, NotChecked=0, Total=462 [2021-10-13 08:08:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-10-13 08:08:03,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 135. [2021-10-13 08:08:03,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 134 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 150 transitions. [2021-10-13 08:08:03,747 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 150 transitions. Word has length 23 [2021-10-13 08:08:03,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:03,748 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 150 transitions. [2021-10-13 08:08:03,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:03,748 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 150 transitions. [2021-10-13 08:08:03,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 08:08:03,749 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:03,749 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:03,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:03,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:03,958 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:08:03,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:03,959 INFO L82 PathProgramCache]: Analyzing trace with hash 151895778, now seen corresponding path program 1 times [2021-10-13 08:08:03,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:03,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608829278] [2021-10-13 08:08:03,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:03,959 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:03,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:03,960 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:04,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 08:08:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:04,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:08:04,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:04,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 08:08:04,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-10-13 08:08:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:04,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:04,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-10-13 08:08:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:04,667 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:04,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608829278] [2021-10-13 08:08:04,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608829278] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:04,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:04,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 9 [2021-10-13 08:08:04,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869014216] [2021-10-13 08:08:04,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 08:08:04,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:04,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 08:08:04,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:08:04,669 INFO L87 Difference]: Start difference. First operand 135 states and 150 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:05,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:05,508 INFO L93 Difference]: Finished difference Result 152 states and 166 transitions. [2021-10-13 08:08:05,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 08:08:05,509 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 08:08:05,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:05,510 INFO L225 Difference]: With dead ends: 152 [2021-10-13 08:08:05,510 INFO L226 Difference]: Without dead ends: 152 [2021-10-13 08:08:05,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 193.2ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-13 08:08:05,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-13 08:08:05,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 135. [2021-10-13 08:08:05,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 99 states have (on average 1.505050505050505) internal successors, (149), 134 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:05,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 149 transitions. [2021-10-13 08:08:05,515 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 149 transitions. Word has length 24 [2021-10-13 08:08:05,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:05,515 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 149 transitions. [2021-10-13 08:08:05,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:05,516 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 149 transitions. [2021-10-13 08:08:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 08:08:05,517 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:05,517 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:05,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:05,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:05,724 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:08:05,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:05,724 INFO L82 PathProgramCache]: Analyzing trace with hash 413848728, now seen corresponding path program 1 times [2021-10-13 08:08:05,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:05,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247106136] [2021-10-13 08:08:05,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:05,725 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:05,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:05,726 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:05,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 08:08:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:05,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:08:05,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:06,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:08:06,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 08:08:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:06,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:06,342 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 38 treesize of output 32 [2021-10-13 08:08:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:06,445 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:06,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247106136] [2021-10-13 08:08:06,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247106136] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:06,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:06,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 9 [2021-10-13 08:08:06,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649202111] [2021-10-13 08:08:06,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 08:08:06,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:06,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 08:08:06,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:08:06,447 INFO L87 Difference]: Start difference. First operand 135 states and 149 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:07,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:07,628 INFO L93 Difference]: Finished difference Result 183 states and 198 transitions. [2021-10-13 08:08:07,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 08:08:07,628 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 08:08:07,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:07,629 INFO L225 Difference]: With dead ends: 183 [2021-10-13 08:08:07,629 INFO L226 Difference]: Without dead ends: 183 [2021-10-13 08:08:07,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 313.9ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-10-13 08:08:07,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-10-13 08:08:07,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 137. [2021-10-13 08:08:07,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 101 states have (on average 1.495049504950495) internal successors, (151), 136 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:07,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2021-10-13 08:08:07,634 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 25 [2021-10-13 08:08:07,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:07,635 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2021-10-13 08:08:07,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:07,635 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2021-10-13 08:08:07,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 08:08:07,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:07,636 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:07,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:07,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:07,854 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:08:07,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:07,855 INFO L82 PathProgramCache]: Analyzing trace with hash -55591098, now seen corresponding path program 1 times [2021-10-13 08:08:07,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:07,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544525059] [2021-10-13 08:08:07,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:07,856 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:07,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:07,857 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:07,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 08:08:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:08,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 08:08:08,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:08,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-13 08:08:08,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-10-13 08:08:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:08,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:08,855 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 38 treesize of output 32 [2021-10-13 08:08:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:08,952 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:08,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544525059] [2021-10-13 08:08:08,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544525059] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:08,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:08,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 13 [2021-10-13 08:08:08,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480740151] [2021-10-13 08:08:08,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 08:08:08,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:08,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 08:08:08,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-10-13 08:08:08,954 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:10,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:10,737 INFO L93 Difference]: Finished difference Result 188 states and 204 transitions. [2021-10-13 08:08:10,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 08:08:10,738 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 08:08:10,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:10,739 INFO L225 Difference]: With dead ends: 188 [2021-10-13 08:08:10,739 INFO L226 Difference]: Without dead ends: 188 [2021-10-13 08:08:10,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 731.1ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-10-13 08:08:10,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-10-13 08:08:10,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 138. [2021-10-13 08:08:10,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 102 states have (on average 1.4901960784313726) internal successors, (152), 137 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:10,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 152 transitions. [2021-10-13 08:08:10,748 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 152 transitions. Word has length 26 [2021-10-13 08:08:10,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:10,748 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 152 transitions. [2021-10-13 08:08:10,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:10,749 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 152 transitions. [2021-10-13 08:08:10,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 08:08:10,749 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:10,750 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:10,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:10,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:10,962 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:08:10,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:10,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1723323814, now seen corresponding path program 1 times [2021-10-13 08:08:10,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:10,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1756749580] [2021-10-13 08:08:10,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:10,963 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:10,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:10,963 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:10,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 08:08:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:11,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:08:11,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:08:11,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:11,375 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 08:08:11,375 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 17 [2021-10-13 08:08:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:08:11,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:11,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1756749580] [2021-10-13 08:08:11,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1756749580] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:11,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:11,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 08:08:11,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055477008] [2021-10-13 08:08:11,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:08:11,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:11,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:08:11,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:11,421 INFO L87 Difference]: Start difference. First operand 138 states and 152 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:11,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:11,825 INFO L93 Difference]: Finished difference Result 178 states and 194 transitions. [2021-10-13 08:08:11,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:08:11,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-13 08:08:11,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:11,826 INFO L225 Difference]: With dead ends: 178 [2021-10-13 08:08:11,826 INFO L226 Difference]: Without dead ends: 178 [2021-10-13 08:08:11,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:08:11,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-13 08:08:11,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 139. [2021-10-13 08:08:11,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 105 states have (on average 1.4952380952380953) internal successors, (157), 138 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:11,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 157 transitions. [2021-10-13 08:08:11,831 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 157 transitions. Word has length 27 [2021-10-13 08:08:11,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:11,832 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 157 transitions. [2021-10-13 08:08:11,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:11,832 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 157 transitions. [2021-10-13 08:08:11,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 08:08:11,833 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:11,833 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:11,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-10-13 08:08:12,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:12,045 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr56REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:08:12,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:12,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1743197853, now seen corresponding path program 1 times [2021-10-13 08:08:12,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:12,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632752855] [2021-10-13 08:08:12,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:12,046 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:12,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:12,047 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:12,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 08:08:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:12,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 08:08:12,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:12,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:08:12,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:08:12,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:12,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 08:08:12,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:12,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 08:08:12,580 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 08:08:12,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 08:08:12,629 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-10-13 08:08:12,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-10-13 08:08:12,862 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 08:08:12,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2021-10-13 08:08:12,870 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 08:08:12,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 58 [2021-10-13 08:08:13,571 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 72 treesize of output 71 [2021-10-13 08:08:13,956 INFO L354 Elim1Store]: treesize reduction 50, result has 5.7 percent of original size [2021-10-13 08:08:13,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 65 [2021-10-13 08:08:13,983 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-10-13 08:08:13,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 39 [2021-10-13 08:08:14,002 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:08:14,002 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 24 treesize of output 24 [2021-10-13 08:08:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:14,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:14,328 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 13 treesize of output 11 [2021-10-13 08:08:17,140 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~lItem~0.base (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~lItem~0.offset))) (and (= (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~lItem~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~lItem~0.base) c_ULTIMATE.start_main_~lItem~0.offset ULTIMATE.start_main_~lItem~0.base) .cse0 c_ULTIMATE.start_main_~item~0.base)) c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32)) (= (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~lItem~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~lItem~0.base) c_ULTIMATE.start_main_~lItem~0.offset c_ULTIMATE.start_main_~lItem~0.offset) .cse0 c_ULTIMATE.start_main_~item~0.offset)) c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32)))) (= c_ULTIMATE.start_main_~item~0.base ULTIMATE.start_main_~lItem~0.base))) is different from false [2021-10-13 08:08:19,272 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~lItem~0.base (_ BitVec 32))) (or (= c_ULTIMATE.start_main_~item~0.base ULTIMATE.start_main_~lItem~0.base) (and (= (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~lItem~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~lItem~0.base) (_ bv0 32) ULTIMATE.start_main_~lItem~0.base) (_ bv4 32) c_ULTIMATE.start_main_~item~0.base)) c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32)) (= (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~lItem~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~lItem~0.base) (_ bv0 32) (_ bv0 32)) (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset)) c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32))))) is different from false [2021-10-13 08:08:19,292 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:19,294 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-10-13 08:08:19,298 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:19,299 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-10-13 08:08:21,396 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~lItem~0.base (_ BitVec 32))) (or (and (forall ((v_DerPreprocessor_1 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~item~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset) v_DerPreprocessor_1)))) (store .cse0 ULTIMATE.start_main_~lItem~0.base (store (store (select .cse0 ULTIMATE.start_main_~lItem~0.base) (_ bv0 32) (_ bv0 32)) (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset))) c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32))) (forall ((v_DerPreprocessor_2 (_ BitVec 32))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset) v_DerPreprocessor_2)))) (store .cse1 ULTIMATE.start_main_~lItem~0.base (store (store (select .cse1 ULTIMATE.start_main_~lItem~0.base) (_ bv0 32) ULTIMATE.start_main_~lItem~0.base) (_ bv4 32) c_ULTIMATE.start_main_~item~0.base))) c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32)))) (= c_ULTIMATE.start_main_~item~0.base ULTIMATE.start_main_~lItem~0.base))) is different from false [2021-10-13 08:08:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:21,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:21,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632752855] [2021-10-13 08:08:21,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632752855] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:08:21,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [182435583] [2021-10-13 08:08:21,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:21,534 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:08:21,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:08:21,540 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:08:21,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-13 08:08:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:22,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 08:08:22,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:22,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:08:22,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:08:22,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:22,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 08:08:22,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:22,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 08:08:22,292 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-10-13 08:08:22,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-10-13 08:08:22,346 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 08:08:22,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 08:08:22,452 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 08:08:22,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2021-10-13 08:08:22,460 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 08:08:22,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 58 [2021-10-13 08:08:23,102 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 72 treesize of output 71 [2021-10-13 08:08:23,476 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-10-13 08:08:23,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 68 [2021-10-13 08:08:23,504 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-10-13 08:08:23,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 39 [2021-10-13 08:08:23,522 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:08:23,523 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 27 treesize of output 27 [2021-10-13 08:08:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:23,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:24,116 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 13 treesize of output 11 [2021-10-13 08:08:27,911 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:27,912 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-10-13 08:08:27,916 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:27,916 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-10-13 08:08:28,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:28,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:28,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [182435583] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:08:28,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421508672] [2021-10-13 08:08:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:28,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:08:28,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:08:28,565 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:08:28,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 08:08:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:29,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 08:08:29,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:29,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:08:29,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:08:29,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:08:29,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:29,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 08:08:29,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:29,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 08:08:29,353 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:08:29,353 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 16 treesize of output 16 [2021-10-13 08:08:29,508 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 19 treesize of output 18 [2021-10-13 08:08:29,533 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 19 treesize of output 18 [2021-10-13 08:08:29,963 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 08:08:29,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2021-10-13 08:08:29,973 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 08:08:29,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 58 [2021-10-13 08:08:31,213 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-10-13 08:08:31,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 53 [2021-10-13 08:08:31,244 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-10-13 08:08:31,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 33 [2021-10-13 08:08:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:31,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:34,630 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~lItem~0.base_54 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~lItem~0.base_54))))) (and (= (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~lItem~0.base_54 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~lItem~0.base_54) (_ bv0 32) (_ bv0 32)) (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset)) c_ULTIMATE.start_main_~item~0.base) (_ bv0 32)) (_ bv0 32)) (= (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~lItem~0.base_54 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~lItem~0.base_54) (_ bv0 32) v_ULTIMATE.start_main_~lItem~0.base_54) (_ bv4 32) c_ULTIMATE.start_main_~item~0.base)) c_ULTIMATE.start_main_~item~0.base) (_ bv0 32)) (_ bv0 32))))) is different from false [2021-10-13 08:08:34,643 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:34,644 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-10-13 08:08:34,646 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:34,647 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-10-13 08:08:57,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 320 [2021-10-13 08:08:57,143 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 337 treesize of output 329 [2021-10-13 08:08:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:59,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421508672] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:08:59,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:08:59,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 16, 15, 14, 15] total 57 [2021-10-13 08:08:59,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610426696] [2021-10-13 08:08:59,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-10-13 08:08:59,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:59,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-10-13 08:08:59,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=2461, Unknown=14, NotChecked=420, Total=3192 [2021-10-13 08:08:59,838 INFO L87 Difference]: Start difference. First operand 139 states and 157 transitions. Second operand has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 57 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:02,271 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~item~0.base)) (_ bv1 1))) (= c_ULTIMATE.start_main_~item~0.offset (_ bv0 32)) (forall ((ULTIMATE.start_main_~lItem~0.base (_ BitVec 32))) (or (and (forall ((v_DerPreprocessor_1 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~item~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset) v_DerPreprocessor_1)))) (store .cse0 ULTIMATE.start_main_~lItem~0.base (store (store (select .cse0 ULTIMATE.start_main_~lItem~0.base) (_ bv0 32) (_ bv0 32)) (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset))) c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32))) (forall ((v_DerPreprocessor_2 (_ BitVec 32))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset) v_DerPreprocessor_2)))) (store .cse1 ULTIMATE.start_main_~lItem~0.base (store (store (select .cse1 ULTIMATE.start_main_~lItem~0.base) (_ bv0 32) ULTIMATE.start_main_~lItem~0.base) (_ bv4 32) c_ULTIMATE.start_main_~item~0.base))) c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32)))) (= c_ULTIMATE.start_main_~item~0.base ULTIMATE.start_main_~lItem~0.base))) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32))) is different from false [2021-10-13 08:09:04,292 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~item~0.base)) (_ bv1 1))) (forall ((ULTIMATE.start_main_~lItem~0.base (_ BitVec 32))) (or (= c_ULTIMATE.start_main_~item~0.base ULTIMATE.start_main_~lItem~0.base) (and (= (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~lItem~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~lItem~0.base) (_ bv0 32) ULTIMATE.start_main_~lItem~0.base) (_ bv4 32) c_ULTIMATE.start_main_~item~0.base)) c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32)) (= (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~lItem~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~lItem~0.base) (_ bv0 32) (_ bv0 32)) (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset)) c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32))))) (= c_ULTIMATE.start_main_~item~0.offset (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32)) (forall ((v_ULTIMATE.start_main_~lItem~0.base_54 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~lItem~0.base_54))))) (and (= (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~lItem~0.base_54 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~lItem~0.base_54) (_ bv0 32) (_ bv0 32)) (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset)) c_ULTIMATE.start_main_~item~0.base) (_ bv0 32)) (_ bv0 32)) (= (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~lItem~0.base_54 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~lItem~0.base_54) (_ bv0 32) v_ULTIMATE.start_main_~lItem~0.base_54) (_ bv4 32) c_ULTIMATE.start_main_~item~0.base)) c_ULTIMATE.start_main_~item~0.base) (_ bv0 32)) (_ bv0 32))))) (= (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32))) is different from false [2021-10-13 08:09:06,300 WARN L838 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~lItem~0.offset (_ bv0 32)) (forall ((ULTIMATE.start_main_~lItem~0.base (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~lItem~0.offset))) (and (= (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~lItem~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~lItem~0.base) c_ULTIMATE.start_main_~lItem~0.offset ULTIMATE.start_main_~lItem~0.base) .cse0 c_ULTIMATE.start_main_~item~0.base)) c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32)) (= (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~lItem~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~lItem~0.base) c_ULTIMATE.start_main_~lItem~0.offset c_ULTIMATE.start_main_~lItem~0.offset) .cse0 c_ULTIMATE.start_main_~item~0.offset)) c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32)))) (= c_ULTIMATE.start_main_~item~0.base ULTIMATE.start_main_~lItem~0.base))) (= c_ULTIMATE.start_main_~item~0.offset (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32)) (not (= c_ULTIMATE.start_main_~item~0.base c_ULTIMATE.start_main_~lItem~0.base)) (= (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32))) is different from false [2021-10-13 08:09:11,094 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~data~0.offset))) (let ((.cse6 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~data~0.base) .cse5))) (let ((.cse0 (select |c_#memory_$Pointer$.offset| .cse6)) (.cse1 (select |c_#memory_$Pointer$.base| .cse6))) (and (= (select .cse0 (_ bv0 32)) (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~item~0.base)) (_ bv1 1))) (= (_ bv0 32) (select .cse1 (_ bv0 32))) (= c_ULTIMATE.start_main_~item~0.offset (_ bv0 32)) (forall ((ULTIMATE.start_main_~lItem~0.base (_ BitVec 32))) (or (and (forall ((v_DerPreprocessor_1 (_ BitVec 32))) (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~item~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset) v_DerPreprocessor_1)))) (store .cse2 ULTIMATE.start_main_~lItem~0.base (store (store (select .cse2 ULTIMATE.start_main_~lItem~0.base) (_ bv0 32) (_ bv0 32)) (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset))) c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32))) (forall ((v_DerPreprocessor_2 (_ BitVec 32))) (= (select (select (let ((.cse3 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset) v_DerPreprocessor_2)))) (store .cse3 ULTIMATE.start_main_~lItem~0.base (store (store (select .cse3 ULTIMATE.start_main_~lItem~0.base) (_ bv0 32) ULTIMATE.start_main_~lItem~0.base) (_ bv4 32) c_ULTIMATE.start_main_~item~0.base))) c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32)))) (= c_ULTIMATE.start_main_~item~0.base ULTIMATE.start_main_~lItem~0.base))) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32)) (or (let ((.cse4 (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~data~0.base) .cse5))) (and (= (select .cse0 .cse4) (_ bv0 32)) (= (select .cse1 .cse4) (_ bv0 32)))) (= c_ULTIMATE.start_main_~data~0.base .cse6)) (= (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base) c_ULTIMATE.start_main_~item~0.offset) (_ bv0 32)))))) is different from false [2021-10-13 08:09:23,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:09:23,450 INFO L93 Difference]: Finished difference Result 162 states and 180 transitions. [2021-10-13 08:09:23,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 08:09:23,451 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 57 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-13 08:09:23,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:09:23,452 INFO L225 Difference]: With dead ends: 162 [2021-10-13 08:09:23,452 INFO L226 Difference]: Without dead ends: 162 [2021-10-13 08:09:23,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 55243.0ms TimeCoverageRelationStatistics Valid=562, Invalid=3612, Unknown=18, NotChecked=1064, Total=5256 [2021-10-13 08:09:23,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-10-13 08:09:23,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 141. [2021-10-13 08:09:23,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 107 states have (on average 1.485981308411215) internal successors, (159), 140 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 159 transitions. [2021-10-13 08:09:23,476 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 159 transitions. Word has length 29 [2021-10-13 08:09:23,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:09:23,477 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 159 transitions. [2021-10-13 08:09:23,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 57 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:23,477 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 159 transitions. [2021-10-13 08:09:23,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 08:09:23,478 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:09:23,479 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:09:23,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-10-13 08:09:23,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 08:09:23,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 08:09:24,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:09:24,088 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:09:24,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:09:24,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1795442755, now seen corresponding path program 1 times [2021-10-13 08:09:24,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:09:24,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244128382] [2021-10-13 08:09:24,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:09:24,089 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:09:24,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:09:24,090 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:09:24,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-13 08:09:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:09:24,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 08:09:24,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:09:24,616 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-10-13 08:09:24,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-10-13 08:09:26,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2021-10-13 08:09:27,506 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 46 treesize of output 30 [2021-10-13 08:09:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:33,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:09:33,903 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 58 treesize of output 52 [2021-10-13 08:10:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:00,606 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:10:00,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244128382] [2021-10-13 08:10:00,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244128382] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:00,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [627973380] [2021-10-13 08:10:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:00,607 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:10:00,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:10:00,607 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:10:00,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-13 08:10:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:01,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 08:10:01,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:01,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2021-10-13 08:10:02,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:10:02,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 33 [2021-10-13 08:10:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:07,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:09,676 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 08:10:09,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 138 [2021-10-13 08:10:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:39,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [627973380] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:39,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015189638] [2021-10-13 08:10:39,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:39,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:39,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:10:39,343 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:10:39,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-13 08:10:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:39,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 08:10:39,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:40,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2021-10-13 08:10:40,318 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 46 treesize of output 30 [2021-10-13 08:10:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:40,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:40,797 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 58 treesize of output 52 [2021-10-13 08:11:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:39,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015189638] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:11:39,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:11:39,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 14, 14, 11, 11] total 47 [2021-10-13 08:11:39,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294388125] [2021-10-13 08:11:39,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-13 08:11:39,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:11:39,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-13 08:11:39,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1962, Unknown=48, NotChecked=0, Total=2256 [2021-10-13 08:11:39,409 INFO L87 Difference]: Start difference. First operand 141 states and 159 transitions. Second operand has 48 states, 47 states have (on average 2.595744680851064) internal successors, (122), 48 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:57,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:57,947 INFO L93 Difference]: Finished difference Result 157 states and 174 transitions. [2021-10-13 08:11:57,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 08:11:57,947 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.595744680851064) internal successors, (122), 48 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-13 08:11:57,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:57,948 INFO L225 Difference]: With dead ends: 157 [2021-10-13 08:11:57,948 INFO L226 Difference]: Without dead ends: 140 [2021-10-13 08:11:57,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 129390.8ms TimeCoverageRelationStatistics Valid=433, Invalid=3179, Unknown=48, NotChecked=0, Total=3660 [2021-10-13 08:11:57,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-13 08:11:57,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 126. [2021-10-13 08:11:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 92 states have (on average 1.5543478260869565) internal successors, (143), 125 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:57,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 143 transitions. [2021-10-13 08:11:57,953 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 143 transitions. Word has length 30 [2021-10-13 08:11:57,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:57,953 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 143 transitions. [2021-10-13 08:11:57,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.595744680851064) internal successors, (122), 48 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:57,954 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 143 transitions. [2021-10-13 08:11:57,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 08:11:57,954 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:57,955 INFO L512 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] [2021-10-13 08:11:57,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-10-13 08:11:58,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-13 08:11:58,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-13 08:11:58,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:11:58,559 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:11:58,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:58,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1199473135, now seen corresponding path program 1 times [2021-10-13 08:11:58,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:11:58,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916218335] [2021-10-13 08:11:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:58,562 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:11:58,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:11:58,563 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:11:58,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-13 08:11:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:59,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:11:59,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:11:59,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:11:59,379 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 08:11:59,379 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 17 treesize of output 22 [2021-10-13 08:11:59,514 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-10-13 08:11:59,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 60 [2021-10-13 08:11:59,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:12:00,053 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 08:12:00,054 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 60 treesize of output 46 [2021-10-13 08:12:00,563 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 08:12:00,564 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 95 treesize of output 62 [2021-10-13 08:12:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:00,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:12:13,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:12:13,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916218335] [2021-10-13 08:12:13,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916218335] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:12:13,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:12:13,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [] total 13 [2021-10-13 08:12:13,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353053010] [2021-10-13 08:12:13,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 08:12:13,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:12:13,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 08:12:13,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=129, Unknown=6, NotChecked=0, Total=182 [2021-10-13 08:12:13,021 INFO L87 Difference]: Start difference. First operand 126 states and 143 transitions. Second operand has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:42,571 INFO L93 Difference]: Finished difference Result 165 states and 179 transitions. [2021-10-13 08:12:42,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 08:12:42,571 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-13 08:12:42,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:42,572 INFO L225 Difference]: With dead ends: 165 [2021-10-13 08:12:42,573 INFO L226 Difference]: Without dead ends: 165 [2021-10-13 08:12:42,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 33027.9ms TimeCoverageRelationStatistics Valid=125, Invalid=370, Unknown=11, NotChecked=0, Total=506 [2021-10-13 08:12:42,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-10-13 08:12:42,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 129. [2021-10-13 08:12:42,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 95 states have (on average 1.5473684210526315) internal successors, (147), 128 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:42,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2021-10-13 08:12:42,577 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 32 [2021-10-13 08:12:42,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:42,578 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2021-10-13 08:12:42,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:42,578 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2021-10-13 08:12:42,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 08:12:42,579 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:42,579 INFO L512 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] [2021-10-13 08:12:42,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-10-13 08:12:42,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:12:42,794 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:12:42,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:42,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1199473136, now seen corresponding path program 1 times [2021-10-13 08:12:42,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:42,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275348665] [2021-10-13 08:12:42,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:42,796 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:42,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:42,797 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:42,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-13 08:12:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:43,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 08:12:43,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:43,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:12:43,648 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 08:12:43,649 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 [2021-10-13 08:12:43,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:12:43,790 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 08:12:43,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-10-13 08:12:43,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:12:43,931 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 [2021-10-13 08:12:44,026 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 08:12:44,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 49 [2021-10-13 08:12:44,049 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-13 08:12:44,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 55 [2021-10-13 08:12:44,282 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 08:12:44,282 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 55 treesize of output 34 [2021-10-13 08:12:44,286 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 24 treesize of output 16 [2021-10-13 08:12:44,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:44,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:45,681 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:12:45,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275348665] [2021-10-13 08:12:45,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275348665] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:45,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2104067197] [2021-10-13 08:12:45,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:45,682 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:12:45,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:12:45,688 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:12:45,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-10-13 08:12:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:46,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 08:12:46,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:46,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:12:47,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:12:47,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:12:47,097 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 41 [2021-10-13 08:12:47,102 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 36 treesize of output 31 [2021-10-13 08:12:47,449 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 39 treesize of output 27 [2021-10-13 08:12:47,469 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 24 treesize of output 16 [2021-10-13 08:12:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:47,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:57,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2104067197] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 08:12:57,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-13 08:12:57,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 7, 10] total 26 [2021-10-13 08:12:57,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78309696] [2021-10-13 08:12:57,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 08:12:57,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:12:57,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 08:12:57,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=579, Unknown=3, NotChecked=0, Total=702 [2021-10-13 08:12:57,152 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:58,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:58,499 INFO L93 Difference]: Finished difference Result 202 states and 231 transitions. [2021-10-13 08:12:58,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 08:12:58,501 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-13 08:12:58,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:58,502 INFO L225 Difference]: With dead ends: 202 [2021-10-13 08:12:58,502 INFO L226 Difference]: Without dead ends: 202 [2021-10-13 08:12:58,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 8681.8ms TimeCoverageRelationStatistics Valid=190, Invalid=799, Unknown=3, NotChecked=0, Total=992 [2021-10-13 08:12:58,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-10-13 08:12:58,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 129. [2021-10-13 08:12:58,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 95 states have (on average 1.5368421052631578) internal successors, (146), 128 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:58,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 146 transitions. [2021-10-13 08:12:58,507 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 146 transitions. Word has length 32 [2021-10-13 08:12:58,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:58,508 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 146 transitions. [2021-10-13 08:12:58,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:58,508 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 146 transitions. [2021-10-13 08:12:58,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 08:12:58,509 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:58,509 INFO L512 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] [2021-10-13 08:12:58,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-10-13 08:12:58,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-10-13 08:12:58,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:12:58,924 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:12:58,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:58,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1050280761, now seen corresponding path program 1 times [2021-10-13 08:12:58,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:58,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508619190] [2021-10-13 08:12:58,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:58,925 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:58,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:58,926 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:58,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-13 08:12:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:59,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:12:59,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:59,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:12:59,828 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 08:12:59,828 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 17 treesize of output 22 [2021-10-13 08:12:59,949 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 08:12:59,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 33 [2021-10-13 08:13:00,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:13:00,107 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 08:13:00,108 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 38 treesize of output 28 [2021-10-13 08:13:00,194 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 08:13:00,194 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 34 treesize of output 15 [2021-10-13 08:13:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:00,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:13:02,310 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~lItem~0.offset (_ BitVec 32))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~lItem~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~lItem~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~lItem~0.offset) c_ULTIMATE.start_main_~item~0.base)) c_ULTIMATE.start_main_~data~0.base) c_ULTIMATE.start_main_~data~0.offset) c_ULTIMATE.start_main_~data~0.base))) is different from false [2021-10-13 08:13:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-10-13 08:13:02,450 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:13:02,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508619190] [2021-10-13 08:13:02,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508619190] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:13:02,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [801827417] [2021-10-13 08:13:02,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:13:02,451 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:13:02,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:13:02,452 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:13:02,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-10-13 08:13:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:13:03,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 08:13:03,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:13:03,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:13:03,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:13:03,746 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 19 treesize of output 18 [2021-10-13 08:13:03,857 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 08:13:03,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-10-13 08:13:04,003 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 19 treesize of output 18 [2021-10-13 08:13:04,136 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 08:13:04,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-10-13 08:13:04,310 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-13 08:13:04,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2021-10-13 08:13:04,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 08:13:04,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:13:04,691 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 08:13:04,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-10-13 08:13:04,850 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 08:13:04,850 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 48 treesize of output 19 [2021-10-13 08:13:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:04,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:13:04,973 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:13:04,974 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 08:13:09,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-10-13 08:13:09,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [801827417] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:13:09,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814320971] [2021-10-13 08:13:09,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:13:09,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:13:09,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:13:09,187 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:13:09,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-13 08:13:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:13:10,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 08:13:10,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:13:10,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:13:10,205 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:13:10,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-10-13 08:13:10,379 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 08:13:10,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-13 08:13:10,628 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 [2021-10-13 08:13:10,769 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 43 [2021-10-13 08:13:10,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2021-10-13 08:13:11,280 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 08:13:11,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 41 [2021-10-13 08:13:11,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-13 08:13:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:11,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:13:12,656 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 78 treesize of output 72 [2021-10-13 08:13:12,719 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 48 treesize of output 36 [2021-10-13 08:13:13,075 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 143 treesize of output 137 [2021-10-13 08:13:17,271 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 08:13:17,272 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 35 treesize of output 34 [2021-10-13 08:13:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:17,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814320971] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:13:17,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:13:17,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 14, 9, 12, 12] total 46 [2021-10-13 08:13:17,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029404271] [2021-10-13 08:13:17,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-13 08:13:17,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:13:17,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-13 08:13:17,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1763, Unknown=4, NotChecked=86, Total=2070 [2021-10-13 08:13:17,432 INFO L87 Difference]: Start difference. First operand 129 states and 146 transitions. Second operand has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 46 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:25,981 WARN L207 SmtUtils]: Spent 6.16 s on a formula simplification that was a NOOP. DAG size: 39 [2021-10-13 08:16:31,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:31,261 INFO L93 Difference]: Finished difference Result 202 states and 228 transitions. [2021-10-13 08:16:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 08:16:31,263 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 46 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-13 08:16:31,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:31,264 INFO L225 Difference]: With dead ends: 202 [2021-10-13 08:16:31,264 INFO L226 Difference]: Without dead ends: 202 [2021-10-13 08:16:31,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 153 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1676 ImplicationChecksByTransitivity, 38009.0ms TimeCoverageRelationStatistics Valid=778, Invalid=4619, Unknown=9, NotChecked=144, Total=5550 [2021-10-13 08:16:31,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-10-13 08:16:31,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 122. [2021-10-13 08:16:31,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 88 states have (on average 1.5454545454545454) internal successors, (136), 121 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:31,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 136 transitions. [2021-10-13 08:16:31,268 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 136 transitions. Word has length 35 [2021-10-13 08:16:31,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:31,268 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 136 transitions. [2021-10-13 08:16:31,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 46 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:31,268 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 136 transitions. [2021-10-13 08:16:31,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 08:16:31,269 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:31,269 INFO L512 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] [2021-10-13 08:16:31,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:31,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-13 08:16:31,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:31,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:16:31,875 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:16:31,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:31,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2140470001, now seen corresponding path program 1 times [2021-10-13 08:16:31,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:31,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240706263] [2021-10-13 08:16:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:31,875 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:31,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:31,877 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:31,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-13 08:16:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:32,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:16:32,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:32,808 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 23 treesize of output 15 [2021-10-13 08:16:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 08:16:32,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:32,920 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-10-13 08:16:32,920 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 25 treesize of output 24 [2021-10-13 08:16:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 08:16:32,976 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:32,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240706263] [2021-10-13 08:16:32,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240706263] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:32,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:32,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-13 08:16:32,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850276954] [2021-10-13 08:16:32,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:16:32,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:32,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:16:32,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:16:32,978 INFO L87 Difference]: Start difference. First operand 122 states and 136 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:33,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:33,683 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2021-10-13 08:16:33,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:16:33,684 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-13 08:16:33,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:33,685 INFO L225 Difference]: With dead ends: 121 [2021-10-13 08:16:33,685 INFO L226 Difference]: Without dead ends: 121 [2021-10-13 08:16:33,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:16:33,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-13 08:16:33,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-10-13 08:16:33,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 88 states have (on average 1.5340909090909092) internal successors, (135), 120 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:33,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2021-10-13 08:16:33,690 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 36 [2021-10-13 08:16:33,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:33,690 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2021-10-13 08:16:33,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:33,691 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2021-10-13 08:16:33,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 08:16:33,692 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:33,692 INFO L512 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] [2021-10-13 08:16:33,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:33,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:16:33,893 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:16:33,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:33,893 INFO L82 PathProgramCache]: Analyzing trace with hash 2140470002, now seen corresponding path program 1 times [2021-10-13 08:16:33,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:33,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746470417] [2021-10-13 08:16:33,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:33,894 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:33,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:33,894 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:33,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-13 08:16:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:34,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 08:16:34,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:34,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:16:35,009 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 08:16:35,010 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 17 treesize of output 22 [2021-10-13 08:16:35,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:16:35,162 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 08:16:35,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-10-13 08:16:35,297 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 [2021-10-13 08:16:35,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:16:35,400 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 08:16:35,400 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 71 treesize of output 49 [2021-10-13 08:16:35,426 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-13 08:16:35,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 55 [2021-10-13 08:16:35,718 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 08:16:35,718 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 55 treesize of output 34 [2021-10-13 08:16:35,722 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 24 treesize of output 16 [2021-10-13 08:16:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:35,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:36,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:16:36,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:16:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:36,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:36,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746470417] [2021-10-13 08:16:36,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746470417] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:36,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [803123682] [2021-10-13 08:16:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:36,900 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:16:36,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:16:36,908 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:16:36,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-10-13 08:16:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:38,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 08:16:38,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:38,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:16:38,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:16:38,552 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-13 08:16:38,552 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 58 treesize of output 48 [2021-10-13 08:16:38,582 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-13 08:16:38,582 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 33 treesize of output 27 [2021-10-13 08:16:39,161 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 45 treesize of output 33 [2021-10-13 08:16:39,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-10-13 08:16:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:39,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:39,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:39,420 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 38 treesize of output 42 [2021-10-13 08:16:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:41,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [803123682] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 08:16:41,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-13 08:16:41,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9, 8, 12] total 33 [2021-10-13 08:16:41,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916472513] [2021-10-13 08:16:41,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 08:16:41,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:41,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 08:16:41,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 08:16:41,421 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:43,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:43,068 INFO L93 Difference]: Finished difference Result 214 states and 241 transitions. [2021-10-13 08:16:43,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 08:16:43,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-13 08:16:43,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:43,070 INFO L225 Difference]: With dead ends: 214 [2021-10-13 08:16:43,070 INFO L226 Difference]: Without dead ends: 214 [2021-10-13 08:16:43,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 3309.9ms TimeCoverageRelationStatistics Valid=334, Invalid=1558, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 08:16:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-10-13 08:16:43,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 128. [2021-10-13 08:16:43,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 95 states have (on average 1.4947368421052631) internal successors, (142), 127 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 142 transitions. [2021-10-13 08:16:43,074 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 142 transitions. Word has length 36 [2021-10-13 08:16:43,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:43,074 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 142 transitions. [2021-10-13 08:16:43,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:43,074 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 142 transitions. [2021-10-13 08:16:43,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-13 08:16:43,074 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:43,074 INFO L512 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] [2021-10-13 08:16:43,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:43,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:43,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:16:43,475 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:16:43,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:43,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1709632660, now seen corresponding path program 1 times [2021-10-13 08:16:43,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:43,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735306690] [2021-10-13 08:16:43,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:43,476 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:43,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:43,477 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:43,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-13 08:16:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:44,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:16:44,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:44,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:16:44,664 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 08:16:44,664 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 [2021-10-13 08:16:44,877 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 08:16:44,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2021-10-13 08:16:44,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:16:45,069 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 08:16:45,073 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 45 treesize of output 31 [2021-10-13 08:16:45,309 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 08:16:45,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 18 [2021-10-13 08:16:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:45,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:50,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:50,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735306690] [2021-10-13 08:16:50,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735306690] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:50,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1140536962] [2021-10-13 08:16:50,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:50,234 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:16:50,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:16:50,239 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:16:50,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-10-13 08:16:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:51,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 08:16:51,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:51,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:16:51,985 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-10-13 08:16:52,403 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 39 treesize of output 31 [2021-10-13 08:16:52,422 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 16 [2021-10-13 08:16:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:52,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:52,851 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 24 treesize of output 16 [2021-10-13 08:16:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:56,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1140536962] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 08:16:56,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-13 08:16:56,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 9, 11] total 31 [2021-10-13 08:16:56,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621775339] [2021-10-13 08:16:56,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 08:16:56,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:56,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 08:16:56,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=847, Unknown=2, NotChecked=0, Total=992 [2021-10-13 08:16:56,011 INFO L87 Difference]: Start difference. First operand 128 states and 142 transitions. Second operand has 11 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:57,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:57,603 INFO L93 Difference]: Finished difference Result 178 states and 204 transitions. [2021-10-13 08:16:57,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 08:16:57,604 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-13 08:16:57,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:57,605 INFO L225 Difference]: With dead ends: 178 [2021-10-13 08:16:57,605 INFO L226 Difference]: Without dead ends: 178 [2021-10-13 08:16:57,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 8475.3ms TimeCoverageRelationStatistics Valid=256, Invalid=1224, Unknown=2, NotChecked=0, Total=1482 [2021-10-13 08:16:57,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-13 08:16:57,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 129. [2021-10-13 08:16:57,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 96 states have (on average 1.4895833333333333) internal successors, (143), 128 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:57,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2021-10-13 08:16:57,610 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 40 [2021-10-13 08:16:57,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:57,610 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2021-10-13 08:16:57,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:57,610 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2021-10-13 08:16:57,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-13 08:16:57,611 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:57,611 INFO L512 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, 1] [2021-10-13 08:16:57,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:57,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:58,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:16:58,017 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-10-13 08:16:58,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:58,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1944503501, now seen corresponding path program 1 times [2021-10-13 08:16:58,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:58,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846887838] [2021-10-13 08:16:58,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:58,018 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:58,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:58,019 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:58,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-13 08:16:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:59,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 08:16:59,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:59,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:16:59,345 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 08:16:59,346 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 22 treesize of output 29 [2021-10-13 08:16:59,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-13 08:16:59,651 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-10-13 08:16:59,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 59 [2021-10-13 08:16:59,841 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 45 treesize of output 36 [2021-10-13 08:16:59,983 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 08:16:59,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 39 [2021-10-13 08:17:00,237 INFO L354 Elim1Store]: treesize reduction 57, result has 44.1 percent of original size [2021-10-13 08:17:00,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 91 [2021-10-13 08:17:00,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 56 [2021-10-13 08:17:00,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 57 [2021-10-13 08:17:01,382 INFO L354 Elim1Store]: treesize reduction 108, result has 16.9 percent of original size [2021-10-13 08:17:01,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 100 [2021-10-13 08:17:03,461 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-13 08:17:03,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 191 treesize of output 103 [2021-10-13 08:17:04,799 INFO L354 Elim1Store]: treesize reduction 81, result has 23.6 percent of original size [2021-10-13 08:17:04,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 106 treesize of output 121 [2021-10-13 08:17:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:05,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:16,065 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem9.base| (_ BitVec 32)) (ULTIMATE.start_main_~lItem~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~lItem~0.base_109 (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (let ((.cse0 (select (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~lItem~0.base_109 (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~lItem~0.base_109) ULTIMATE.start_main_~lItem~0.offset |ULTIMATE.start_main_#t~mem9.base|)))) (store .cse2 c_ULTIMATE.start_main_~data~0.base (store (select .cse2 c_ULTIMATE.start_main_~data~0.base) c_ULTIMATE.start_main_~data~0.offset v_ULTIMATE.start_main_~lItem~0.base_109))))) (store .cse1 v_ULTIMATE.start_main_~lItem~0.base_109 (store (select .cse1 v_ULTIMATE.start_main_~lItem~0.base_109) (bvadd (_ bv4 32) ULTIMATE.start_main_~lItem~0.offset) c_ULTIMATE.start_main_~item~0.base))) c_ULTIMATE.start_main_~data~0.base))) (select (store (store |c_#valid| v_ULTIMATE.start_main_~lItem~0.base_109 (_ bv1 1)) (select .cse0 c_ULTIMATE.start_main_~data~0.offset) (_ bv0 1)) (select .cse0 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~data~0.offset))))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~lItem~0.base_109)))))) is different from false [2021-10-13 08:17:16,082 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:16,083 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 313 [2021-10-13 08:17:18,182 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem9.base| (_ BitVec 32)) (ULTIMATE.start_main_~lItem~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~lItem~0.base_109 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (let ((.cse0 (select (let ((.cse1 (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset) v_DerPreprocessor_8)))) (store .cse3 v_ULTIMATE.start_main_~lItem~0.base_109 (store (select .cse3 v_ULTIMATE.start_main_~lItem~0.base_109) ULTIMATE.start_main_~lItem~0.offset |ULTIMATE.start_main_#t~mem9.base|))))) (store .cse2 c_ULTIMATE.start_main_~data~0.base (store (select .cse2 c_ULTIMATE.start_main_~data~0.base) c_ULTIMATE.start_main_~data~0.offset v_ULTIMATE.start_main_~lItem~0.base_109))))) (store .cse1 v_ULTIMATE.start_main_~lItem~0.base_109 (store (select .cse1 v_ULTIMATE.start_main_~lItem~0.base_109) (bvadd (_ bv4 32) ULTIMATE.start_main_~lItem~0.offset) c_ULTIMATE.start_main_~item~0.base))) c_ULTIMATE.start_main_~data~0.base))) (select (store (store |c_#valid| v_ULTIMATE.start_main_~lItem~0.base_109 (_ bv1 1)) (select .cse0 c_ULTIMATE.start_main_~data~0.offset) (_ bv0 1)) (select .cse0 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~data~0.offset)))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~lItem~0.base_109)))))) is different from false [2021-10-13 08:17:20,300 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem9.base| (_ BitVec 32)) (ULTIMATE.start_main_~item~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~lItem~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~lItem~0.base_109 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (let ((.cse0 (select (let ((.cse1 (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base) ULTIMATE.start_main_~item~0.offset (_ bv0 32)) (bvadd (_ bv4 32) ULTIMATE.start_main_~item~0.offset) v_DerPreprocessor_8)))) (store .cse3 v_ULTIMATE.start_main_~lItem~0.base_109 (store (select .cse3 v_ULTIMATE.start_main_~lItem~0.base_109) ULTIMATE.start_main_~lItem~0.offset |ULTIMATE.start_main_#t~mem9.base|))))) (store .cse2 c_ULTIMATE.start_main_~data~0.base (store (select .cse2 c_ULTIMATE.start_main_~data~0.base) c_ULTIMATE.start_main_~data~0.offset v_ULTIMATE.start_main_~lItem~0.base_109))))) (store .cse1 v_ULTIMATE.start_main_~lItem~0.base_109 (store (select .cse1 v_ULTIMATE.start_main_~lItem~0.base_109) (bvadd (_ bv4 32) ULTIMATE.start_main_~lItem~0.offset) c_ULTIMATE.start_main_~item~0.base))) c_ULTIMATE.start_main_~data~0.base))) (select (store (store |c_#valid| v_ULTIMATE.start_main_~lItem~0.base_109 (_ bv1 1)) (select .cse0 c_ULTIMATE.start_main_~data~0.offset) (_ bv0 1)) (select .cse0 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~data~0.offset))))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~lItem~0.base_109)))))) is different from false [2021-10-13 08:17:22,571 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem9.base| (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.base_133 (_ BitVec 32)) (ULTIMATE.start_main_~item~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~lItem~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~lItem~0.base_109 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (let ((.cse0 (store |c_#valid| v_ULTIMATE.start_main_~item~0.base_133 (_ bv1 1)))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (let ((.cse1 (select (let ((.cse2 (let ((.cse3 (let ((.cse4 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_133 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_133) ULTIMATE.start_main_~item~0.offset (_ bv0 32)) (bvadd (_ bv4 32) ULTIMATE.start_main_~item~0.offset) v_DerPreprocessor_8)))) (store .cse4 v_ULTIMATE.start_main_~lItem~0.base_109 (store (select .cse4 v_ULTIMATE.start_main_~lItem~0.base_109) ULTIMATE.start_main_~lItem~0.offset |ULTIMATE.start_main_#t~mem9.base|))))) (store .cse3 c_ULTIMATE.start_main_~data~0.base (store (select .cse3 c_ULTIMATE.start_main_~data~0.base) c_ULTIMATE.start_main_~data~0.offset v_ULTIMATE.start_main_~lItem~0.base_109))))) (store .cse2 v_ULTIMATE.start_main_~lItem~0.base_109 (store (select .cse2 v_ULTIMATE.start_main_~lItem~0.base_109) (bvadd (_ bv4 32) ULTIMATE.start_main_~lItem~0.offset) v_ULTIMATE.start_main_~item~0.base_133))) c_ULTIMATE.start_main_~data~0.base))) (select (store (store .cse0 v_ULTIMATE.start_main_~lItem~0.base_109 (_ bv1 1)) (select .cse1 c_ULTIMATE.start_main_~data~0.offset) (_ bv0 1)) (select .cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~data~0.offset)))))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (select .cse0 v_ULTIMATE.start_main_~lItem~0.base_109)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_133))))))) is different from false [2021-10-13 08:17:22,759 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 64659 treesize of output 64467 [2021-10-13 08:17:22,923 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:17:22,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846887838] [2021-10-13 08:17:22,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 08:17:22,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1201373705] [2021-10-13 08:17:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:22,924 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:17:22,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:17:22,928 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:17:22,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-10-13 08:17:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:24,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 08:17:24,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:24,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:17:24,606 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 08:17:24,606 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 21 treesize of output 28 [2021-10-13 08:17:24,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-13 08:17:24,834 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-10-13 08:17:24,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 60 [2021-10-13 08:17:24,973 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 44 treesize of output 35 [2021-10-13 08:17:25,110 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 08:17:25,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 39 [2021-10-13 08:17:25,340 INFO L354 Elim1Store]: treesize reduction 57, result has 44.1 percent of original size [2021-10-13 08:17:25,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 91 [2021-10-13 08:17:26,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 53 [2021-10-13 08:17:26,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 52 [2021-10-13 08:17:26,855 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-10-13 08:17:26,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 92 [2021-10-13 08:17:37,291 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 180 treesize of output 176 [2021-10-13 08:17:37,332 INFO L354 Elim1Store]: treesize reduction 41, result has 8.9 percent of original size [2021-10-13 08:17:37,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 103 [2021-10-13 08:17:38,640 INFO L354 Elim1Store]: treesize reduction 81, result has 23.6 percent of original size [2021-10-13 08:17:38,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 102 treesize of output 117 [2021-10-13 08:17:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:39,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:40,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-10-13 08:17:47,472 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~lItem~0.base_113 (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem9.base| (_ BitVec 32))) (let ((.cse1 (select (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~lItem~0.base_113 (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~lItem~0.base_113) (_ bv0 32) |ULTIMATE.start_main_#t~mem9.base|)))) (store .cse3 c_ULTIMATE.start_main_~data~0.base (store (select .cse3 c_ULTIMATE.start_main_~data~0.base) c_ULTIMATE.start_main_~data~0.offset v_ULTIMATE.start_main_~lItem~0.base_113))))) (store .cse2 v_ULTIMATE.start_main_~lItem~0.base_113 (store (select .cse2 v_ULTIMATE.start_main_~lItem~0.base_113) (_ bv4 32) c_ULTIMATE.start_main_~item~0.base))) c_ULTIMATE.start_main_~data~0.base))) (let ((.cse0 (select .cse1 c_ULTIMATE.start_main_~data~0.offset))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store |c_#valid| v_ULTIMATE.start_main_~lItem~0.base_113 (_ bv1 1)) .cse0 (_ bv0 1)) (select .cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~data~0.offset)))))))))))) (_ bv1 1))) (and (= c_ULTIMATE.start_main_~data~0.offset (_ bv0 32)) (= .cse0 c_ULTIMATE.start_main_~data~0.base)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~lItem~0.base_113)))))))) is different from false [2021-10-13 08:17:47,495 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:47,496 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 460 [2021-10-13 08:17:54,998 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~lItem~0.base_113 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.base_137 (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem9.base| (_ BitVec 32)) (ULTIMATE.start_main_~item~0.offset (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32))) (let ((.cse0 (store |c_#valid| v_ULTIMATE.start_main_~item~0.base_137 (_ bv1 1)))) (or (not (= (_ bv0 1) (bvneg (bvneg (select .cse0 v_ULTIMATE.start_main_~lItem~0.base_113))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_137))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (let ((.cse1 (select (let ((.cse2 (let ((.cse3 (let ((.cse4 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_137 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_137) ULTIMATE.start_main_~item~0.offset (_ bv0 32)) (bvadd (_ bv4 32) ULTIMATE.start_main_~item~0.offset) v_DerPreprocessor_9)))) (store .cse4 v_ULTIMATE.start_main_~lItem~0.base_113 (store (select .cse4 v_ULTIMATE.start_main_~lItem~0.base_113) (_ bv0 32) |ULTIMATE.start_main_#t~mem9.base|))))) (store .cse3 c_ULTIMATE.start_main_~data~0.base (store (select .cse3 c_ULTIMATE.start_main_~data~0.base) c_ULTIMATE.start_main_~data~0.offset v_ULTIMATE.start_main_~lItem~0.base_113))))) (store .cse2 v_ULTIMATE.start_main_~lItem~0.base_113 (store (select .cse2 v_ULTIMATE.start_main_~lItem~0.base_113) (_ bv4 32) v_ULTIMATE.start_main_~item~0.base_137))) c_ULTIMATE.start_main_~data~0.base))) (select (store (store .cse0 v_ULTIMATE.start_main_~lItem~0.base_113 (_ bv1 1)) (select .cse1 c_ULTIMATE.start_main_~data~0.offset) (_ bv0 1)) (select .cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~data~0.offset))))))))))))))) (_ bv1 1)))))) is different from false [2021-10-13 08:17:55,188 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 1084585 treesize of output 1081513 [2021-10-13 08:17:58,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 08:17:58,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297014533] [2021-10-13 08:17:58,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:58,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:17:58,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:17:58,499 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:17:58,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-13 08:17:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:59,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-13 08:17:59,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:59,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:18:00,030 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 08:18:00,031 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 21 treesize of output 28 [2021-10-13 08:18:00,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-13 08:18:00,290 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-10-13 08:18:00,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 59 [2021-10-13 08:18:00,491 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 44 treesize of output 35 [2021-10-13 08:18:00,636 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 08:18:00,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 39 [2021-10-13 08:18:00,834 INFO L354 Elim1Store]: treesize reduction 57, result has 44.1 percent of original size [2021-10-13 08:18:00,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 89 [2021-10-13 08:18:01,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 52 [2021-10-13 08:18:01,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 52 [2021-10-13 08:18:02,033 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-10-13 08:18:02,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 92 [2021-10-13 08:18:03,686 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 180 treesize of output 176 [2021-10-13 08:18:03,724 INFO L354 Elim1Store]: treesize reduction 41, result has 8.9 percent of original size [2021-10-13 08:18:03,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 103 [2021-10-13 08:18:04,937 INFO L354 Elim1Store]: treesize reduction 81, result has 23.6 percent of original size [2021-10-13 08:18:04,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 104 treesize of output 119 [2021-10-13 08:18:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:18:05,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:18:05,777 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 24 treesize of output 16 [2021-10-13 08:18:13,030 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem9.base| (_ BitVec 32)) (v_ULTIMATE.start_main_~lItem~0.base_117 (_ BitVec 32))) (let ((.cse1 (select (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~lItem~0.base_117 (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~lItem~0.base_117) (_ bv0 32) |ULTIMATE.start_main_#t~mem9.base|)))) (store .cse3 c_ULTIMATE.start_main_~data~0.base (store (select .cse3 c_ULTIMATE.start_main_~data~0.base) c_ULTIMATE.start_main_~data~0.offset v_ULTIMATE.start_main_~lItem~0.base_117))))) (store .cse2 v_ULTIMATE.start_main_~lItem~0.base_117 (store (select .cse2 v_ULTIMATE.start_main_~lItem~0.base_117) (_ bv4 32) c_ULTIMATE.start_main_~item~0.base))) c_ULTIMATE.start_main_~data~0.base))) (let ((.cse0 (select .cse1 c_ULTIMATE.start_main_~data~0.offset))) (or (and (= c_ULTIMATE.start_main_~data~0.offset (_ bv0 32)) (= .cse0 c_ULTIMATE.start_main_~data~0.base)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store |c_#valid| v_ULTIMATE.start_main_~lItem~0.base_117 (_ bv1 1)) .cse0 (_ bv0 1)) (select .cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~data~0.offset)))))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~lItem~0.base_117))))))))) is different from false [2021-10-13 08:18:13,054 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:13,055 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 462 [2021-10-13 08:18:15,595 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem9.base| (_ BitVec 32)) (v_ULTIMATE.start_main_~lItem~0.base_117 (_ BitVec 32)) (v_DerPreprocessor_10 (_ BitVec 32))) (let ((.cse1 (select (let ((.cse2 (let ((.cse3 (let ((.cse4 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~item~0.offset) v_DerPreprocessor_10)))) (store .cse4 v_ULTIMATE.start_main_~lItem~0.base_117 (store (select .cse4 v_ULTIMATE.start_main_~lItem~0.base_117) (_ bv0 32) |ULTIMATE.start_main_#t~mem9.base|))))) (store .cse3 c_ULTIMATE.start_main_~data~0.base (store (select .cse3 c_ULTIMATE.start_main_~data~0.base) c_ULTIMATE.start_main_~data~0.offset v_ULTIMATE.start_main_~lItem~0.base_117))))) (store .cse2 v_ULTIMATE.start_main_~lItem~0.base_117 (store (select .cse2 v_ULTIMATE.start_main_~lItem~0.base_117) (_ bv4 32) c_ULTIMATE.start_main_~item~0.base))) c_ULTIMATE.start_main_~data~0.base))) (let ((.cse0 (select .cse1 c_ULTIMATE.start_main_~data~0.offset))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store |c_#valid| v_ULTIMATE.start_main_~lItem~0.base_117 (_ bv1 1)) .cse0 (_ bv0 1)) (select .cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~data~0.offset)))))))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~lItem~0.base_117))))) (and (= c_ULTIMATE.start_main_~data~0.offset (_ bv0 32)) (= .cse0 c_ULTIMATE.start_main_~data~0.base)))))) is different from false [2021-10-13 08:18:18,031 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem9.base| (_ BitVec 32)) (v_ULTIMATE.start_main_~lItem~0.base_117 (_ BitVec 32)) (v_DerPreprocessor_10 (_ BitVec 32)) (ULTIMATE.start_main_~item~0.offset (_ BitVec 32))) (let ((.cse1 (select (let ((.cse2 (let ((.cse3 (let ((.cse4 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~item~0.base) ULTIMATE.start_main_~item~0.offset (_ bv0 32)) (bvadd (_ bv4 32) ULTIMATE.start_main_~item~0.offset) v_DerPreprocessor_10)))) (store .cse4 v_ULTIMATE.start_main_~lItem~0.base_117 (store (select .cse4 v_ULTIMATE.start_main_~lItem~0.base_117) (_ bv0 32) |ULTIMATE.start_main_#t~mem9.base|))))) (store .cse3 c_ULTIMATE.start_main_~data~0.base (store (select .cse3 c_ULTIMATE.start_main_~data~0.base) c_ULTIMATE.start_main_~data~0.offset v_ULTIMATE.start_main_~lItem~0.base_117))))) (store .cse2 v_ULTIMATE.start_main_~lItem~0.base_117 (store (select .cse2 v_ULTIMATE.start_main_~lItem~0.base_117) (_ bv4 32) c_ULTIMATE.start_main_~item~0.base))) c_ULTIMATE.start_main_~data~0.base))) (let ((.cse0 (select .cse1 c_ULTIMATE.start_main_~data~0.offset))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~lItem~0.base_117))))) (and (= c_ULTIMATE.start_main_~data~0.offset (_ bv0 32)) (= .cse0 c_ULTIMATE.start_main_~data~0.base)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store |c_#valid| v_ULTIMATE.start_main_~lItem~0.base_117 (_ bv1 1)) .cse0 (_ bv0 1)) (select .cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~data~0.offset))))))))))))))) (_ bv1 1))))))) is different from false [2021-10-13 08:18:20,834 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem9.base| (_ BitVec 32)) (v_ULTIMATE.start_main_~lItem~0.base_117 (_ BitVec 32)) (v_ULTIMATE.start_main_~item~0.base_141 (_ BitVec 32)) (v_DerPreprocessor_10 (_ BitVec 32)) (ULTIMATE.start_main_~item~0.offset (_ BitVec 32))) (let ((.cse0 (store |c_#valid| v_ULTIMATE.start_main_~item~0.base_141 (_ bv1 1)))) (or (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (let ((.cse1 (select (let ((.cse2 (let ((.cse3 (let ((.cse4 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_141 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~item~0.base_141) ULTIMATE.start_main_~item~0.offset (_ bv0 32)) (bvadd (_ bv4 32) ULTIMATE.start_main_~item~0.offset) v_DerPreprocessor_10)))) (store .cse4 v_ULTIMATE.start_main_~lItem~0.base_117 (store (select .cse4 v_ULTIMATE.start_main_~lItem~0.base_117) (_ bv0 32) |ULTIMATE.start_main_#t~mem9.base|))))) (store .cse3 c_ULTIMATE.start_main_~data~0.base (store (select .cse3 c_ULTIMATE.start_main_~data~0.base) c_ULTIMATE.start_main_~data~0.offset v_ULTIMATE.start_main_~lItem~0.base_117))))) (store .cse2 v_ULTIMATE.start_main_~lItem~0.base_117 (store (select .cse2 v_ULTIMATE.start_main_~lItem~0.base_117) (_ bv4 32) v_ULTIMATE.start_main_~item~0.base_141))) c_ULTIMATE.start_main_~data~0.base))) (select (store (store .cse0 v_ULTIMATE.start_main_~lItem~0.base_117 (_ bv1 1)) (select .cse1 c_ULTIMATE.start_main_~data~0.offset) (_ bv0 1)) (select .cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~data~0.offset))))))))))))))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~item~0.base_141)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select .cse0 v_ULTIMATE.start_main_~lItem~0.base_117))))))))) is different from false [2021-10-13 08:18:21,065 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 2107933 treesize of output 2101789 [2021-10-13 08:18:26,127 WARN L207 SmtUtils]: Spent 5.06 s on a formula simplification that was a NOOP. DAG size: 1068 [2021-10-13 08:18:26,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 08:18:26,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:18:26,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 08:18:26,136 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 08:18:26,136 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 08:18:26,143 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION [2021-10-13 08:18:26,144 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 08:18:26,145 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 08:18:26,145 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 08:18:26,145 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 08:18:26,145 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 08:18:26,145 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 08:18:26,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 08:18:26,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 08:18:26,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 08:18:26,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 08:18:26,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 08:18:26,147 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 08:18:26,147 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-13 08:18:26,147 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-13 08:18:26,147 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-13 08:18:26,147 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-13 08:18:26,147 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-13 08:18:26,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-13 08:18:26,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-10-13 08:18:26,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-10-13 08:18:26,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION [2021-10-13 08:18:26,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION [2021-10-13 08:18:26,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION [2021-10-13 08:18:26,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION [2021-10-13 08:18:26,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION [2021-10-13 08:18:26,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION [2021-10-13 08:18:26,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION [2021-10-13 08:18:26,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION [2021-10-13 08:18:26,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 08:18:26,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 08:18:26,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 08:18:26,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATION [2021-10-13 08:18:26,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATION [2021-10-13 08:18:26,151 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATION [2021-10-13 08:18:26,151 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATION [2021-10-13 08:18:26,151 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATION [2021-10-13 08:18:26,151 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATION [2021-10-13 08:18:26,151 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATION [2021-10-13 08:18:26,151 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39REQUIRES_VIOLATION [2021-10-13 08:18:26,152 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40REQUIRES_VIOLATION [2021-10-13 08:18:26,152 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41REQUIRES_VIOLATION [2021-10-13 08:18:26,152 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42REQUIRES_VIOLATION [2021-10-13 08:18:26,152 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr43REQUIRES_VIOLATION [2021-10-13 08:18:26,152 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr44REQUIRES_VIOLATION [2021-10-13 08:18:26,153 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr45REQUIRES_VIOLATION [2021-10-13 08:18:26,153 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr46REQUIRES_VIOLATION [2021-10-13 08:18:26,153 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr47REQUIRES_VIOLATION [2021-10-13 08:18:26,153 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr48REQUIRES_VIOLATION [2021-10-13 08:18:26,153 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr49REQUIRES_VIOLATION [2021-10-13 08:18:26,153 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr50REQUIRES_VIOLATION [2021-10-13 08:18:26,154 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr51REQUIRES_VIOLATION [2021-10-13 08:18:26,154 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr52REQUIRES_VIOLATION [2021-10-13 08:18:26,154 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 08:18:26,154 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 08:18:26,154 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 08:18:26,155 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr56REQUIRES_VIOLATION [2021-10-13 08:18:26,155 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr57REQUIRES_VIOLATION [2021-10-13 08:18:26,155 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 08:18:26,155 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 08:18:26,155 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 08:18:26,156 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 08:18:26,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-13 08:18:26,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-10-13 08:18:26,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2021-10-13 08:18:26,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:18:26,789 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:18:26,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:18:26 BoogieIcfgContainer [2021-10-13 08:18:26,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:18:26,804 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:18:26,804 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:18:26,804 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:18:26,804 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:06:31" (3/4) ... [2021-10-13 08:18:26,807 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 08:18:26,807 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:18:26,808 INFO L168 Benchmark]: Toolchain (without parser) took 717143.78 ms. Allocated memory was 56.6 MB in the beginning and 402.7 MB in the end (delta: 346.0 MB). Free memory was 33.7 MB in the beginning and 280.1 MB in the end (delta: -246.4 MB). Peak memory consumption was 98.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:18:26,808 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 56.6 MB. Free memory is still 37.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:18:26,808 INFO L168 Benchmark]: CACSL2BoogieTranslator took 708.50 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 33.4 MB in the beginning and 46.2 MB in the end (delta: -12.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:18:26,808 INFO L168 Benchmark]: Boogie Procedure Inliner took 91.52 ms. Allocated memory is still 71.3 MB. Free memory was 46.2 MB in the beginning and 44.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:18:26,809 INFO L168 Benchmark]: Boogie Preprocessor took 73.21 ms. Allocated memory is still 71.3 MB. Free memory was 44.0 MB in the beginning and 42.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:18:26,809 INFO L168 Benchmark]: RCFGBuilder took 936.45 ms. Allocated memory is still 71.3 MB. Free memory was 41.9 MB in the beginning and 36.8 MB in the end (delta: 5.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:18:26,810 INFO L168 Benchmark]: TraceAbstraction took 715324.02 ms. Allocated memory was 71.3 MB in the beginning and 402.7 MB in the end (delta: 331.4 MB). Free memory was 36.5 MB in the beginning and 280.1 MB in the end (delta: -243.6 MB). Peak memory consumption was 271.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:18:26,810 INFO L168 Benchmark]: Witness Printer took 3.24 ms. Allocated memory is still 402.7 MB. Free memory is still 280.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:18:26,812 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 56.6 MB. Free memory is still 37.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 708.50 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 33.4 MB in the beginning and 46.2 MB in the end (delta: -12.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 91.52 ms. Allocated memory is still 71.3 MB. Free memory was 46.2 MB in the beginning and 44.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 73.21 ms. Allocated memory is still 71.3 MB. Free memory was 44.0 MB in the beginning and 42.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 936.45 ms. Allocated memory is still 71.3 MB. Free memory was 41.9 MB in the beginning and 36.8 MB in the end (delta: 5.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 715324.02 ms. Allocated memory was 71.3 MB in the beginning and 402.7 MB in the end (delta: 331.4 MB). Free memory was 36.5 MB in the beginning and 280.1 MB in the end (delta: -243.6 MB). Peak memory consumption was 271.1 MB. Max. memory is 16.1 GB. * Witness Printer took 3.24 ms. Allocated memory is still 402.7 MB. Free memory is still 280.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 564]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L533] struct TLItem* data = ((void *)0); [L534] struct DItem* item, * item2; [L535] struct TLItem *lItem; [L536] COND TRUE __VERIFIER_nondet_int() [L537] item = malloc(sizeof *item) [L538] COND FALSE !(!item) [L540] item->next = ((void *)0) [L541] item->value = __VERIFIER_nondet_int() [L542] lItem = malloc(sizeof *lItem) [L543] COND FALSE !(\read(*data)) [L547] lItem->next = lItem [L548] data = lItem [L550] lItem->data = item [L551] item = ((void *)0) [L552] lItem = ((void *)0) [L536] COND TRUE __VERIFIER_nondet_int() [L537] item = malloc(sizeof *item) [L538] COND FALSE !(!item) [L540] item->next = ((void *)0) [L541] item->value = __VERIFIER_nondet_int() [L542] lItem = malloc(sizeof *lItem) [L543] COND TRUE \read(*data) [L544] EXPR data->next [L544] lItem->next = data->next [L545] data->next = lItem [L550] lItem->data = item [L551] item = ((void *)0) [L552] lItem = ((void *)0) [L536] COND FALSE !(__VERIFIER_nondet_int()) [L554] COND FALSE !(!data) [L556] EXPR data->next [L556] COND TRUE data->next != data [L557] EXPR data->data [L557] item = data->data [L558] EXPR data->next [L558] EXPR data->next->data [L558] item2 = data->next->data [L559] EXPR data->next [L559] lItem = data->next [L560] EXPR lItem->next [L560] data->next = lItem->next [L561] free(lItem) [L561] free(lItem) [L561] free(lItem) [L562] struct DItem** dst = &data->data; [L563] COND TRUE item && item2 [L564] item->value - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 561]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 561]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 561]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 566]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 566]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 569]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 569]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 574]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 574]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 583]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 583]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 584]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 584]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 584]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 587]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 587]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 588]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 588]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 588]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 130 locations, 62 error locations. Started 1 CEGAR loops. OverallTime: 715236.6ms, OverallIterations: 28, TraceHistogramMax: 2, EmptinessCheckTime: 40.9ms, AutomataDifference: 342081.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2569 SDtfs, 4801 SDslu, 7966 SDs, 0 SdLazy, 10187 SolverSat, 594 SolverUnsat, 102 SolverUnknown, 0 SolverNotchecked, 244828.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1802 GetRequests, 1291 SyntacticMatches, 31 SemanticMatches, 480 ConstructedPredicates, 9 IntricatePredicates, 1 DeprecatedPredicates, 6174 ImplicationChecksByTransitivity, 318901.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=20, InterpolantAutomatonStates: 289, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 192.2ms AutomataMinimizationTime, 27 MinimizatonAttempts, 984 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 382.1ms SsaConstructionTime, 3139.4ms SatisfiabilityAnalysisTime, 259691.3ms InterpolantComputationTime, 862 NumberOfCodeBlocks, 862 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 1652 ConstructedInterpolants, 221 QuantifiedInterpolants, 26559 SizeOfPredicates, 301 NumberOfNonLiveVariables, 3859 ConjunctsInSsa, 387 ConjunctsInUnsatCore, 72 InterpolantComputations, 45 PerfectInterpolantSequences, 197/274 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 08:18:26,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb20dca5-0ce1-4a43-8b75-d11d3e655931/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...