./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/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_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bf89a9db9089e52f60762f5e253ea7c1b22972a3 ..................................................................................................................................................................................................................................................................................................................................................................................................... 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_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/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_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bf89a9db9089e52f60762f5e253ea7c1b22972a3 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: translation of (bvneg (_ BitVec 1) (_ BitVec 1)) not yet implemented, please contact Matthias --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:44:42,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:44:42,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:44:42,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:44:42,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:44:42,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:44:42,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:44:42,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:44:42,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:44:42,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:44:42,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:44:42,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:44:42,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:44:42,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:44:42,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:44:42,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:44:42,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:44:42,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:44:42,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:44:42,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:44:42,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:44:42,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:44:42,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:44:42,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:44:42,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:44:42,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:44:42,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:44:42,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:44:42,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:44:42,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:44:42,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:44:42,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:44:42,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:44:42,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:44:42,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:44:42,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:44:42,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:44:42,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:44:42,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:44:42,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:44:42,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:44:42,976 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 06:44:42,999 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:44:43,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:44:43,001 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:44:43,001 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:44:43,002 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:44:43,002 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:44:43,003 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 06:44:43,003 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:44:43,003 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:44:43,004 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 06:44:43,004 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 06:44:43,004 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:44:43,004 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 06:44:43,005 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 06:44:43,005 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 06:44:43,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:44:43,006 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:44:43,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 06:44:43,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:44:43,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:44:43,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:44:43,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:44:43,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:44:43,008 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:44:43,008 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:44:43,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:44:43,008 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:44:43,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:44:43,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:44:43,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:44:43,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:44:43,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:44:43,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:44:43,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:44:43,010 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 06:44:43,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 06:44:43,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:44:43,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:44:43,011 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:44:43,011 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_a8fb4976-62e2-4c2c-af3f-d35496f10841/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf89a9db9089e52f60762f5e253ea7c1b22972a3 [2021-10-13 06:44:43,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:44:43,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:44:43,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:44:43,292 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:44:43,293 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:44:43,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2021-10-13 06:44:43,357 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/data/a526b600c/74d8cbc141304d5d8470efd0c3fb6702/FLAGdbdc23887 [2021-10-13 06:44:43,877 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:44:43,877 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2021-10-13 06:44:43,889 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/data/a526b600c/74d8cbc141304d5d8470efd0c3fb6702/FLAGdbdc23887 [2021-10-13 06:44:44,194 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/data/a526b600c/74d8cbc141304d5d8470efd0c3fb6702 [2021-10-13 06:44:44,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:44:44,198 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:44:44,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:44:44,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:44:44,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:44:44,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:44:44" (1/1) ... [2021-10-13 06:44:44,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b2ec07f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:44, skipping insertion in model container [2021-10-13 06:44:44,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:44:44" (1/1) ... [2021-10-13 06:44:44,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:44:44,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:44:44,596 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i[24236,24249] [2021-10-13 06:44:44,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:44:44,615 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:44:44,685 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i[24236,24249] [2021-10-13 06:44:44,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:44:44,732 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:44:44,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:44 WrapperNode [2021-10-13 06:44:44,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:44:44,734 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:44:44,734 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:44:44,734 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:44:44,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:44" (1/1) ... [2021-10-13 06:44:44,755 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:44" (1/1) ... [2021-10-13 06:44:44,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:44:44,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:44:44,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:44:44,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:44:44,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:44" (1/1) ... [2021-10-13 06:44:44,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:44" (1/1) ... [2021-10-13 06:44:44,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:44" (1/1) ... [2021-10-13 06:44:44,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:44" (1/1) ... [2021-10-13 06:44:44,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:44" (1/1) ... [2021-10-13 06:44:44,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:44" (1/1) ... [2021-10-13 06:44:44,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:44" (1/1) ... [2021-10-13 06:44:44,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:44:44,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:44:44,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:44:44,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:44:44,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:44" (1/1) ... [2021-10-13 06:44:44,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:44:44,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:44:44,846 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:44:44,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:44:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 06:44:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 06:44:44,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 06:44:44,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 06:44:44,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:44:44,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 06:44:44,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:44:44,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 06:44:44,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:44:44,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:44:45,487 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:44:45,487 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-13 06:44:45,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:44:45 BoogieIcfgContainer [2021-10-13 06:44:45,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:44:45,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:44:45,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:44:45,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:44:45,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:44:44" (1/3) ... [2021-10-13 06:44:45,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c10eb91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:44:45, skipping insertion in model container [2021-10-13 06:44:45,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:44" (2/3) ... [2021-10-13 06:44:45,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c10eb91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:44:45, skipping insertion in model container [2021-10-13 06:44:45,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:44:45" (3/3) ... [2021-10-13 06:44:45,502 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_update_all_reverse.i [2021-10-13 06:44:45,508 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:44:45,509 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:44:45,578 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:44:45,587 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=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 06:44:45,587 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:44:45,602 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 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 06:44:45,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 06:44:45,608 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:45,609 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:45,610 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:45,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:45,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1020711375, now seen corresponding path program 1 times [2021-10-13 06:44:45,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:44:45,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140655517] [2021-10-13 06:44:45,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:45,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:44:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:45,811 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 06:44:45,812 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:44:45,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140655517] [2021-10-13 06:44:45,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140655517] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:45,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:45,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:44:45,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746442016] [2021-10-13 06:44:45,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:44:45,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:44:45,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:44:45,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:45,837 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 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) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 06:44:45,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:45,886 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2021-10-13 06:44:45,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:44:45,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 06:44:45,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:45,896 INFO L225 Difference]: With dead ends: 27 [2021-10-13 06:44:45,896 INFO L226 Difference]: Without dead ends: 12 [2021-10-13 06:44:45,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:45,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-13 06:44:45,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-10-13 06:44:45,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 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 06:44:45,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2021-10-13 06:44:45,929 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 7 [2021-10-13 06:44:45,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:45,930 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2021-10-13 06:44:45,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 06:44:45,930 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2021-10-13 06:44:45,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 06:44:45,931 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:45,931 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:45,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 06:44:45,932 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:45,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:45,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1514154756, now seen corresponding path program 1 times [2021-10-13 06:44:45,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:44:45,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256832706] [2021-10-13 06:44:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:45,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:44:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:46,021 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 06:44:46,021 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:44:46,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256832706] [2021-10-13 06:44:46,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256832706] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:46,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:46,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 06:44:46,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120349929] [2021-10-13 06:44:46,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:44:46,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:44:46,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:44:46,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:44:46,026 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.25) 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 06:44:46,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:46,073 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2021-10-13 06:44:46,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:44:46,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) 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 06:44:46,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:46,075 INFO L225 Difference]: With dead ends: 23 [2021-10-13 06:44:46,075 INFO L226 Difference]: Without dead ends: 18 [2021-10-13 06:44:46,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 06:44:46,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-13 06:44:46,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2021-10-13 06:44:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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 06:44:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2021-10-13 06:44:46,081 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2021-10-13 06:44:46,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:46,082 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-10-13 06:44:46,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) 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 06:44:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2021-10-13 06:44:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 06:44:46,083 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:46,084 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:46,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 06:44:46,084 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:46,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:46,085 INFO L82 PathProgramCache]: Analyzing trace with hash 46798207, now seen corresponding path program 1 times [2021-10-13 06:44:46,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:44:46,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642068944] [2021-10-13 06:44:46,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:46,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:44:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:44:46,190 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:44:46,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642068944] [2021-10-13 06:44:46,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642068944] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 06:44:46,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490842465] [2021-10-13 06:44:46,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:46,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:44:46,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:44:46,193 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:44:46,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 06:44:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:46,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:44:46,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:44:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:44:46,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:44:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:44:46,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490842465] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:44:46,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1984851199] [2021-10-13 06:44:46,422 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-13 06:44:46,422 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 06:44:46,426 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 06:44:46,432 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 06:44:46,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 06:44:46,464 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:44:46,471 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:44:46,472 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:44:46,473 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 06:44:46,474 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:44:46,475 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:44:46,475 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-13 06:44:46,479 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 113 [2021-10-13 06:44:46,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:44:46,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-13 06:44:46,529 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:44:46,533 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-13 06:44:46,535 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:44:46,536 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-13 06:44:46,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 06:44:46,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:44:46,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:44:46,594 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:44:46,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-10-13 06:44:46,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 06:44:46,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:110, output treesize:111 [2021-10-13 06:44:46,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:44:46,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-13 06:44:46,826 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_14| 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 06:44:46,830 INFO L168 Benchmark]: Toolchain (without parser) took 2631.03 ms. Allocated memory was 123.7 MB in the beginning and 165.7 MB in the end (delta: 41.9 MB). Free memory was 78.5 MB in the beginning and 111.3 MB in the end (delta: -32.8 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. [2021-10-13 06:44:46,830 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 123.7 MB. Free memory was 97.1 MB in the beginning and 97.0 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:44:46,831 INFO L168 Benchmark]: CACSL2BoogieTranslator took 532.97 ms. Allocated memory is still 123.7 MB. Free memory was 78.3 MB in the beginning and 90.0 MB in the end (delta: -11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 06:44:46,831 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.69 ms. Allocated memory is still 123.7 MB. Free memory was 90.0 MB in the beginning and 87.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:44:46,832 INFO L168 Benchmark]: Boogie Preprocessor took 31.79 ms. Allocated memory is still 123.7 MB. Free memory was 87.9 MB in the beginning and 86.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:44:46,832 INFO L168 Benchmark]: RCFGBuilder took 680.46 ms. Allocated memory is still 123.7 MB. Free memory was 86.5 MB in the beginning and 68.2 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-13 06:44:46,833 INFO L168 Benchmark]: TraceAbstraction took 1335.23 ms. Allocated memory was 123.7 MB in the beginning and 165.7 MB in the end (delta: 41.9 MB). Free memory was 67.8 MB in the beginning and 111.3 MB in the end (delta: -43.5 MB). Peak memory consumption was 898.9 kB. Max. memory is 16.1 GB. [2021-10-13 06:44:46,836 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 123.7 MB. Free memory was 97.1 MB in the beginning and 97.0 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 532.97 ms. Allocated memory is still 123.7 MB. Free memory was 78.3 MB in the beginning and 90.0 MB in the end (delta: -11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.69 ms. Allocated memory is still 123.7 MB. Free memory was 90.0 MB in the beginning and 87.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.79 ms. Allocated memory is still 123.7 MB. Free memory was 87.9 MB in the beginning and 86.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 680.46 ms. Allocated memory is still 123.7 MB. Free memory was 86.5 MB in the beginning and 68.2 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1335.23 ms. Allocated memory was 123.7 MB in the beginning and 165.7 MB in the end (delta: 41.9 MB). Free memory was 67.8 MB in the beginning and 111.3 MB in the end (delta: -43.5 MB). Peak memory consumption was 898.9 kB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_14| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_14|: 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 06:44:46,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:44:49,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:44:49,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:44:49,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:44:49,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:44:49,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:44:49,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:44:49,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:44:49,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:44:49,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:44:49,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:44:49,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:44:49,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:44:49,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:44:49,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:44:49,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:44:49,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:44:49,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:44:49,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:44:49,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:44:49,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:44:49,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:44:49,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:44:49,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:44:49,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:44:49,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:44:49,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:44:49,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:44:49,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:44:49,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:44:49,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:44:49,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:44:49,464 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:44:49,465 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:44:49,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:44:49,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:44:49,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:44:49,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:44:49,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:44:49,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:44:49,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:44:49,471 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 06:44:49,499 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:44:49,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:44:49,500 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:44:49,500 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:44:49,500 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:44:49,501 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:44:49,501 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:44:49,501 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:44:49,501 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:44:49,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:44:49,502 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:44:49,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:44:49,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:44:49,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:44:49,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:44:49,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:44:49,503 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:44:49,503 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 06:44:49,504 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 06:44:49,504 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:44:49,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:44:49,504 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:44:49,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:44:49,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:44:49,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 06:44:49,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:44:49,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:44:49,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:44:49,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:44:49,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:44:49,506 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 06:44:49,506 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 06:44:49,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:44:49,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:44:49,507 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:44:49,507 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_a8fb4976-62e2-4c2c-af3f-d35496f10841/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf89a9db9089e52f60762f5e253ea7c1b22972a3 [2021-10-13 06:44:49,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:44:49,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:44:49,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:44:49,942 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:44:49,942 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:44:49,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2021-10-13 06:44:50,023 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/data/1500e0b9e/c9d673040ee64509b7304f844d1a5c9f/FLAGac609358a [2021-10-13 06:44:50,631 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:44:50,632 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2021-10-13 06:44:50,654 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/data/1500e0b9e/c9d673040ee64509b7304f844d1a5c9f/FLAGac609358a [2021-10-13 06:44:50,886 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/data/1500e0b9e/c9d673040ee64509b7304f844d1a5c9f [2021-10-13 06:44:50,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:44:50,890 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:44:50,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:44:50,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:44:50,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:44:50,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:44:50" (1/1) ... [2021-10-13 06:44:50,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48722102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:50, skipping insertion in model container [2021-10-13 06:44:50,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:44:50" (1/1) ... [2021-10-13 06:44:50,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:44:50,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:44:51,295 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i[24236,24249] [2021-10-13 06:44:51,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:44:51,328 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:44:51,383 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i[24236,24249] [2021-10-13 06:44:51,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:44:51,419 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:44:51,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:51 WrapperNode [2021-10-13 06:44:51,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:44:51,421 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:44:51,421 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:44:51,421 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:44:51,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:51" (1/1) ... [2021-10-13 06:44:51,446 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:51" (1/1) ... [2021-10-13 06:44:51,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:44:51,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:44:51,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:44:51,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:44:51,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:51" (1/1) ... [2021-10-13 06:44:51,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:51" (1/1) ... [2021-10-13 06:44:51,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:51" (1/1) ... [2021-10-13 06:44:51,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:51" (1/1) ... [2021-10-13 06:44:51,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:51" (1/1) ... [2021-10-13 06:44:51,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:51" (1/1) ... [2021-10-13 06:44:51,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:51" (1/1) ... [2021-10-13 06:44:51,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:44:51,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:44:51,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:44:51,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:44:51,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:51" (1/1) ... [2021-10-13 06:44:51,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:44:51,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:44:51,576 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:44:51,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:44:51,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 06:44:51,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 06:44:51,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 06:44:51,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:44:51,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 06:44:51,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:44:51,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 06:44:51,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 06:44:51,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:44:51,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:44:52,163 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:44:52,163 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-13 06:44:52,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:44:52 BoogieIcfgContainer [2021-10-13 06:44:52,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:44:52,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:44:52,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:44:52,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:44:52,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:44:50" (1/3) ... [2021-10-13 06:44:52,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d387891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:44:52, skipping insertion in model container [2021-10-13 06:44:52,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:51" (2/3) ... [2021-10-13 06:44:52,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d387891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:44:52, skipping insertion in model container [2021-10-13 06:44:52,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:44:52" (3/3) ... [2021-10-13 06:44:52,173 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_update_all_reverse.i [2021-10-13 06:44:52,190 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:44:52,191 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:44:52,255 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:44:52,263 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=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 06:44:52,263 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:44:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 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 06:44:52,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 06:44:52,298 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:52,298 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:52,299 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:52,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:52,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1121238131, now seen corresponding path program 1 times [2021-10-13 06:44:52,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:44:52,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472919117] [2021-10-13 06:44:52,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:52,330 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:44:52,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:44:52,336 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:44:52,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 06:44:52,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:52,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 06:44:52,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:44:52,510 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 06:44:52,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:44:52,552 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 06:44:52,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:44:52,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472919117] [2021-10-13 06:44:52,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [472919117] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:52,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:52,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 06:44:52,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328572989] [2021-10-13 06:44:52,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 06:44:52,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:44:52,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 06:44:52,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 06:44:52,577 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 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 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 06:44:52,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:52,593 INFO L93 Difference]: Finished difference Result 50 states and 73 transitions. [2021-10-13 06:44:52,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 06:44:52,595 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 13 [2021-10-13 06:44:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:52,602 INFO L225 Difference]: With dead ends: 50 [2021-10-13 06:44:52,602 INFO L226 Difference]: Without dead ends: 22 [2021-10-13 06:44:52,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 06:44:52,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-13 06:44:52,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-13 06:44:52,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:52,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-10-13 06:44:52,636 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2021-10-13 06:44:52,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:52,636 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-10-13 06:44:52,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 06:44:52,636 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-10-13 06:44:52,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 06:44:52,637 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:52,637 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:52,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:44:52,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:44:52,863 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:52,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:52,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1860179837, now seen corresponding path program 1 times [2021-10-13 06:44:52,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:44:52,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852744706] [2021-10-13 06:44:52,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:52,865 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:44:52,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:44:52,866 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:44:52,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 06:44:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:52,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:44:52,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:44:53,082 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 06:44:53,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:44:53,135 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 06:44:53,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:44:53,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852744706] [2021-10-13 06:44:53,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852744706] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:53,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:53,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 06:44:53,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475847167] [2021-10-13 06:44:53,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:44:53,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:44:53,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:44:53,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:44:53,139 INFO L87 Difference]: Start difference. First operand 22 states and 26 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 06:44:53,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:53,161 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2021-10-13 06:44:53,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:44:53,162 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 13 [2021-10-13 06:44:53,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:53,162 INFO L225 Difference]: With dead ends: 43 [2021-10-13 06:44:53,163 INFO L226 Difference]: Without dead ends: 28 [2021-10-13 06:44:53,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:44:53,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-13 06:44:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-13 06:44:53,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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 06:44:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-10-13 06:44:53,169 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 13 [2021-10-13 06:44:53,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:53,169 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-10-13 06:44:53,170 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 06:44:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-10-13 06:44:53,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 06:44:53,171 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:53,171 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:53,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 06:44:53,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:44:53,384 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:53,385 INFO L82 PathProgramCache]: Analyzing trace with hash -650193283, now seen corresponding path program 1 times [2021-10-13 06:44:53,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:44:53,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032809620] [2021-10-13 06:44:53,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:53,386 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:44:53,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:44:53,387 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:44:53,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 06:44:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:53,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:44:53,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:44:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-13 06:44:53,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:44:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-13 06:44:53,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:44:53,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032809620] [2021-10-13 06:44:53,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032809620] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:53,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:53,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 06:44:53,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374739215] [2021-10-13 06:44:53,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:44:53,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:44:53,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:44:53,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 06:44:53,829 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:53,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:53,919 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-10-13 06:44:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:44:53,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-13 06:44:53,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:53,923 INFO L225 Difference]: With dead ends: 51 [2021-10-13 06:44:53,923 INFO L226 Difference]: Without dead ends: 42 [2021-10-13 06:44:53,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:44:53,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-13 06:44:53,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2021-10-13 06:44:53,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:53,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-10-13 06:44:53,954 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 23 [2021-10-13 06:44:53,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:53,954 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-10-13 06:44:53,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:53,955 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-10-13 06:44:53,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 06:44:53,957 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:53,957 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:53,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 06:44:54,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:44:54,172 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:54,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:54,173 INFO L82 PathProgramCache]: Analyzing trace with hash 218280017, now seen corresponding path program 1 times [2021-10-13 06:44:54,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:44:54,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963224993] [2021-10-13 06:44:54,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:54,174 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:44:54,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:44:54,175 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:44:54,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 06:44:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:54,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:44:54,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:44:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 06:44:54,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:44:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 06:44:54,632 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:44:54,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963224993] [2021-10-13 06:44:54,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963224993] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:54,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:54,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 06:44:54,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505145433] [2021-10-13 06:44:54,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 06:44:54,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:44:54,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 06:44:54,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:44:54,635 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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 06:44:54,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:54,709 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-10-13 06:44:54,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:44:54,710 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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 31 [2021-10-13 06:44:54,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:54,711 INFO L225 Difference]: With dead ends: 58 [2021-10-13 06:44:54,711 INFO L226 Difference]: Without dead ends: 42 [2021-10-13 06:44:54,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-13 06:44:54,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-13 06:44:54,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2021-10-13 06:44:54,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 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 06:44:54,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-10-13 06:44:54,718 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 31 [2021-10-13 06:44:54,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:54,719 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-10-13 06:44:54,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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 06:44:54,719 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-10-13 06:44:54,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 06:44:54,720 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:54,720 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:54,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 06:44:54,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:44:54,934 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:54,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:54,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1177402658, now seen corresponding path program 1 times [2021-10-13 06:44:54,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:44:54,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389489890] [2021-10-13 06:44:54,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:54,935 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:44:54,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:44:54,936 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:44:54,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 06:44:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:55,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:44:55,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:44:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 06:44:55,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:44:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 06:44:55,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:44:55,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389489890] [2021-10-13 06:44:55,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389489890] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:55,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:55,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 06:44:55,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630510693] [2021-10-13 06:44:55,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 06:44:55,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:44:55,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 06:44:55,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:44:55,407 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 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 06:44:55,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:55,496 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-10-13 06:44:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:44:55,496 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 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 06:44:55,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:55,497 INFO L225 Difference]: With dead ends: 51 [2021-10-13 06:44:55,497 INFO L226 Difference]: Without dead ends: 43 [2021-10-13 06:44:55,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-13 06:44:55,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-13 06:44:55,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2021-10-13 06:44:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 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 06:44:55,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-10-13 06:44:55,504 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 32 [2021-10-13 06:44:55,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:55,504 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-10-13 06:44:55,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 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 06:44:55,505 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-10-13 06:44:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 06:44:55,505 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:55,506 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:55,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 06:44:55,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:44:55,720 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:55,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:55,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2088089927, now seen corresponding path program 1 times [2021-10-13 06:44:55,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:44:55,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323124158] [2021-10-13 06:44:55,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:55,722 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:44:55,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:44:55,723 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:44:55,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 06:44:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:55,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-13 06:44:55,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:44:56,007 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 06:44:56,131 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 06:44:56,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-10-13 06:44:56,244 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 18 treesize of output 14 [2021-10-13 06:44:56,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 06:44:56,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:44:56,834 INFO L354 Elim1Store]: treesize reduction 101, result has 14.4 percent of original size [2021-10-13 06:44:56,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 139 treesize of output 102 [2021-10-13 06:44:56,846 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 94 treesize of output 84 [2021-10-13 06:44:56,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:44:56,891 INFO L354 Elim1Store]: treesize reduction 105, result has 11.0 percent of original size [2021-10-13 06:44:56,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 67 [2021-10-13 06:44:57,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:44:57,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:44:57,249 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-10-13 06:44:57,249 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 82 treesize of output 73 [2021-10-13 06:44:57,281 INFO L354 Elim1Store]: treesize reduction 61, result has 23.8 percent of original size [2021-10-13 06:44:57,281 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 67 treesize of output 66 [2021-10-13 06:44:57,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:44:57,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 38 [2021-10-13 06:44:57,707 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 59 treesize of output 47 [2021-10-13 06:44:57,715 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 06:44:57,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-13 06:44:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 06:44:58,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:44:58,917 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:44:58,922 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-10-13 06:44:58,926 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:44:58,928 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-10-13 06:45:02,855 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 510 treesize of output 466 [2021-10-13 06:45:02,870 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:02,878 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 562 [2021-10-13 06:45:02,889 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:02,910 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 658 [2021-10-13 06:45:06,815 INFO L354 Elim1Store]: treesize reduction 19, result has 62.0 percent of original size [2021-10-13 06:45:06,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 44 [2021-10-13 06:45:06,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-10-13 06:45:06,828 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 47 treesize of output 39 [2021-10-13 06:45:06,925 INFO L354 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2021-10-13 06:45:06,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 32 [2021-10-13 06:45:06,933 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 20 [2021-10-13 06:45:06,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:45:06,943 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 17 treesize of output 9 [2021-10-13 06:45:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:07,788 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:45:07,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323124158] [2021-10-13 06:45:07,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323124158] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:07,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [140863509] [2021-10-13 06:45:07,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:07,789 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:45:07,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:45:07,791 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:45:07,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 06:45:08,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:08,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-13 06:45:08,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:08,249 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 06:45:08,753 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 06:45:08,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-13 06:45:09,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 06:45:09,186 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 18 treesize of output 14 [2021-10-13 06:45:10,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:45:10,523 INFO L354 Elim1Store]: treesize reduction 105, result has 11.0 percent of original size [2021-10-13 06:45:10,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 91 [2021-10-13 06:45:10,530 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 89 treesize of output 79 [2021-10-13 06:45:10,564 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-10-13 06:45:10,564 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 79 treesize of output 63 [2021-10-13 06:45:11,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:11,174 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 75 treesize of output 57 [2021-10-13 06:45:11,209 INFO L354 Elim1Store]: treesize reduction 61, result has 23.8 percent of original size [2021-10-13 06:45:11,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 59 [2021-10-13 06:45:11,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:11,218 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 49 treesize of output 37 [2021-10-13 06:45:11,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-10-13 06:45:11,897 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 06:45:12,107 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 06:45:12,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 06:45:12,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:12,551 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:12,552 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-10-13 06:45:12,556 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:12,565 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-10-13 06:45:17,252 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 244 treesize of output 222 [2021-10-13 06:45:17,265 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:17,268 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 254 [2021-10-13 06:45:17,274 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:17,276 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 286 [2021-10-13 06:45:18,726 INFO L354 Elim1Store]: treesize reduction 24, result has 52.0 percent of original size [2021-10-13 06:45:18,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 80 [2021-10-13 06:45:18,764 INFO L354 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2021-10-13 06:45:18,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 62 [2021-10-13 06:45:18,773 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 54 treesize of output 50 [2021-10-13 06:45:18,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2021-10-13 06:45:18,794 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 61 treesize of output 53 [2021-10-13 06:45:18,807 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 64 treesize of output 56 [2021-10-13 06:45:18,820 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 06:45:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:19,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [140863509] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:19,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325718802] [2021-10-13 06:45:19,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:19,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:45:19,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:45:19,637 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:45:19,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 06:45:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:19,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-13 06:45:19,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:19,909 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 06:45:19,978 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 06:45:19,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-13 06:45:20,045 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 18 treesize of output 14 [2021-10-13 06:45:20,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 06:45:20,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:45:20,398 INFO L354 Elim1Store]: treesize reduction 107, result has 9.3 percent of original size [2021-10-13 06:45:20,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 89 [2021-10-13 06:45:20,404 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 77 treesize of output 69 [2021-10-13 06:45:20,431 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-10-13 06:45:20,432 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 69 treesize of output 55 [2021-10-13 06:45:20,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:20,758 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 75 treesize of output 57 [2021-10-13 06:45:20,794 INFO L354 Elim1Store]: treesize reduction 61, result has 23.8 percent of original size [2021-10-13 06:45:20,794 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 59 [2021-10-13 06:45:20,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:20,802 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 49 treesize of output 37 [2021-10-13 06:45:20,941 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 26 [2021-10-13 06:45:20,946 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 06:45:20,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 06:45:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 06:45:20,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:23,610 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:23,611 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-10-13 06:45:23,615 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:23,616 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-10-13 06:45:26,641 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 510 treesize of output 466 [2021-10-13 06:45:26,648 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:26,659 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 562 [2021-10-13 06:45:26,668 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:26,671 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 658 [2021-10-13 06:45:30,978 INFO L354 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2021-10-13 06:45:30,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 73 [2021-10-13 06:45:31,054 INFO L354 Elim1Store]: treesize reduction 24, result has 52.0 percent of original size [2021-10-13 06:45:31,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 62 [2021-10-13 06:45:31,084 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 54 treesize of output 50 [2021-10-13 06:45:31,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2021-10-13 06:45:31,102 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 61 treesize of output 53 [2021-10-13 06:45:31,109 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 64 treesize of output 56 [2021-10-13 06:45:31,110 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 06:45:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:32,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325718802] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:32,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:45:32,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20, 20, 20, 20] total 74 [2021-10-13 06:45:32,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307705086] [2021-10-13 06:45:32,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-10-13 06:45:32,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:45:32,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-10-13 06:45:32,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=5117, Unknown=3, NotChecked=0, Total=5402 [2021-10-13 06:45:32,459 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 74 states, 74 states have (on average 1.7027027027027026) internal successors, (126), 74 states have internal predecessors, (126), 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 06:45:45,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:45:45,179 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2021-10-13 06:45:45,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 06:45:45,181 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.7027027027027026) internal successors, (126), 74 states have internal predecessors, (126), 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 33 [2021-10-13 06:45:45,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:45:45,182 INFO L225 Difference]: With dead ends: 75 [2021-10-13 06:45:45,182 INFO L226 Difference]: Without dead ends: 73 [2021-10-13 06:45:45,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 34787.0ms TimeCoverageRelationStatistics Valid=1201, Invalid=8302, Unknown=3, NotChecked=0, Total=9506 [2021-10-13 06:45:45,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-13 06:45:45,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2021-10-13 06:45:45,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:45:45,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2021-10-13 06:45:45,204 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 33 [2021-10-13 06:45:45,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:45:45,204 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2021-10-13 06:45:45,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.7027027027027026) internal successors, (126), 74 states have internal predecessors, (126), 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 06:45:45,205 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2021-10-13 06:45:45,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 06:45:45,206 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:45,206 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:45,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-10-13 06:45:45,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:45,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:45,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:45:45,810 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:45,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:45,810 INFO L82 PathProgramCache]: Analyzing trace with hash -254624194, now seen corresponding path program 2 times [2021-10-13 06:45:45,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:45:45,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137020420] [2021-10-13 06:45:45,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:45:45,811 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:45:45,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:45:45,812 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:45:45,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 06:45:46,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:45:46,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:45:46,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 06:45:46,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 06:45:46,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 06:45:46,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:45:46,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137020420] [2021-10-13 06:45:46,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137020420] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:46,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [374986052] [2021-10-13 06:45:46,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:45:46,584 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:45:46,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:45:46,589 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:45:46,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 06:45:47,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:45:47,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:45:47,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 06:45:47,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 06:45:47,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 06:45:47,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [374986052] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:47,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550721952] [2021-10-13 06:45:47,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:45:47,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:45:47,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:45:47,439 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:45:47,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 06:45:47,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:45:47,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:45:47,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:45:47,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 06:45:47,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 06:45:48,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550721952] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:48,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:45:48,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 15 [2021-10-13 06:45:48,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562330564] [2021-10-13 06:45:48,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 06:45:48,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:45:48,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 06:45:48,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-13 06:45:48,507 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 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 06:45:49,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:45:49,305 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2021-10-13 06:45:49,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 06:45:49,306 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 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 34 [2021-10-13 06:45:49,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:45:49,307 INFO L225 Difference]: With dead ends: 107 [2021-10-13 06:45:49,307 INFO L226 Difference]: Without dead ends: 99 [2021-10-13 06:45:49,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 883.0ms TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2021-10-13 06:45:49,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-13 06:45:49,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 67. [2021-10-13 06:45:49,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 66 states have internal predecessors, (80), 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 06:45:49,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2021-10-13 06:45:49,334 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 34 [2021-10-13 06:45:49,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:45:49,335 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2021-10-13 06:45:49,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 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 06:45:49,335 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2021-10-13 06:45:49,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 06:45:49,336 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:49,337 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:49,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:49,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:49,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:49,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:45:49,962 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:49,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:49,962 INFO L82 PathProgramCache]: Analyzing trace with hash 891797658, now seen corresponding path program 3 times [2021-10-13 06:45:49,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:45:49,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [883182408] [2021-10-13 06:45:49,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 06:45:49,963 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:45:49,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:45:49,964 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:45:49,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 06:45:50,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 06:45:50,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:45:50,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 06:45:50,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:45:50,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:45:50,730 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:45:50,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [883182408] [2021-10-13 06:45:50,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [883182408] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:50,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1559058591] [2021-10-13 06:45:50,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 06:45:50,731 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:45:50,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:45:50,731 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:45:50,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-13 06:45:51,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 06:45:51,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:45:51,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 06:45:51,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:45:51,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:45:51,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1559058591] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:51,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13162600] [2021-10-13 06:45:51,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 06:45:51,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:45:51,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:45:51,590 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:45:51,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 06:45:52,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 06:45:52,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:45:52,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 06:45:52,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:45:52,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 06:45:52,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13162600] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 06:45:52,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 06:45:52,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 6, 6, 6] total 14 [2021-10-13 06:45:52,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781871347] [2021-10-13 06:45:52,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 06:45:52,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:45:52,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 06:45:52,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-13 06:45:52,812 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 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 06:45:52,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:45:52,948 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2021-10-13 06:45:52,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:45:52,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 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 34 [2021-10-13 06:45:52,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:45:52,950 INFO L225 Difference]: With dead ends: 98 [2021-10-13 06:45:52,950 INFO L226 Difference]: Without dead ends: 71 [2021-10-13 06:45:52,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 258.0ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-10-13 06:45:52,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-13 06:45:52,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2021-10-13 06:45:52,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 66 states have internal predecessors, (80), 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 06:45:52,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2021-10-13 06:45:52,972 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 34 [2021-10-13 06:45:52,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:45:52,973 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2021-10-13 06:45:52,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 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 06:45:52,973 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2021-10-13 06:45:52,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 06:45:52,974 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:52,974 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:53,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:53,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-13 06:45:53,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:53,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 06:45:53,598 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:53,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:53,599 INFO L82 PathProgramCache]: Analyzing trace with hash 985623046, now seen corresponding path program 4 times [2021-10-13 06:45:53,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:45:53,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348970185] [2021-10-13 06:45:53,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 06:45:53,599 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:45:53,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:45:53,600 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:45:53,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 06:45:53,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 06:45:53,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:45:53,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 06:45:53,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 06:45:54,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 06:45:54,325 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:45:54,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348970185] [2021-10-13 06:45:54,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348970185] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:54,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2013019479] [2021-10-13 06:45:54,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 06:45:54,326 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:45:54,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:45:54,331 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:45:54,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-10-13 06:45:54,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 06:45:54,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:45:54,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 06:45:54,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 06:45:54,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 06:45:55,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2013019479] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:55,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293159911] [2021-10-13 06:45:55,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 06:45:55,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:45:55,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:45:55,137 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:45:55,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 06:45:55,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 06:45:55,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:45:55,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:45:55,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 06:45:55,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 06:45:56,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293159911] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:56,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:45:56,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 15 [2021-10-13 06:45:56,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107044909] [2021-10-13 06:45:56,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 06:45:56,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:45:56,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 06:45:56,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-13 06:45:56,200 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 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 06:45:57,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:45:57,220 INFO L93 Difference]: Finished difference Result 168 states and 202 transitions. [2021-10-13 06:45:57,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 06:45:57,221 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 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 34 [2021-10-13 06:45:57,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:45:57,223 INFO L225 Difference]: With dead ends: 168 [2021-10-13 06:45:57,223 INFO L226 Difference]: Without dead ends: 133 [2021-10-13 06:45:57,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1025.7ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 06:45:57,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-13 06:45:57,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 79. [2021-10-13 06:45:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 78 states have internal predecessors, (96), 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 06:45:57,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2021-10-13 06:45:57,252 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 34 [2021-10-13 06:45:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:45:57,253 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2021-10-13 06:45:57,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 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 06:45:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2021-10-13 06:45:57,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 06:45:57,260 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:57,261 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:57,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:57,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-10-13 06:45:57,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:57,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:45:57,882 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:57,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:57,883 INFO L82 PathProgramCache]: Analyzing trace with hash 2070220400, now seen corresponding path program 5 times [2021-10-13 06:45:57,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:45:57,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265440597] [2021-10-13 06:45:57,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 06:45:57,884 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:45:57,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:45:57,885 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:45:57,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 06:45:58,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 06:45:58,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:45:58,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 06:45:58,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 06:45:58,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 06:45:59,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:45:59,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265440597] [2021-10-13 06:45:59,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265440597] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:59,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1886169641] [2021-10-13 06:45:59,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 06:45:59,020 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:45:59,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:45:59,020 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:45:59,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-13 06:45:59,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 06:45:59,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:45:59,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 06:45:59,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:45:59,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:46:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:46:00,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1886169641] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:46:00,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442609416] [2021-10-13 06:46:00,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 06:46:00,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:46:00,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:46:00,257 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:46:00,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 06:46:01,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 06:46:01,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:46:01,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 06:46:01,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:46:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:46:01,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:46:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:46:01,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442609416] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:46:01,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:46:01,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7, 8, 7, 8] total 15 [2021-10-13 06:46:01,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868603743] [2021-10-13 06:46:01,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 06:46:01,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:46:01,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 06:46:01,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-13 06:46:01,433 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 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 06:46:01,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:46:01,785 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2021-10-13 06:46:01,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 06:46:01,786 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 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 38 [2021-10-13 06:46:01,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:46:01,787 INFO L225 Difference]: With dead ends: 106 [2021-10-13 06:46:01,787 INFO L226 Difference]: Without dead ends: 52 [2021-10-13 06:46:01,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 206 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 643.9ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-10-13 06:46:01,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-13 06:46:01,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-13 06:46:01,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 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 06:46:01,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-10-13 06:46:01,803 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 38 [2021-10-13 06:46:01,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:46:01,803 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-10-13 06:46:01,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 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 06:46:01,803 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-10-13 06:46:01,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-13 06:46:01,804 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:46:01,804 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:46:01,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 06:46:02,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-10-13 06:46:02,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-13 06:46:02,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:46:02,421 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:46:02,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:46:02,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1232245788, now seen corresponding path program 1 times [2021-10-13 06:46:02,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:46:02,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177472682] [2021-10-13 06:46:02,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:46:02,422 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:46:02,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:46:02,423 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:46:02,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 06:46:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:46:02,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 06:46:02,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:46:03,143 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 15 treesize of output 11 [2021-10-13 06:46:03,438 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 06:46:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:46:03,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:46:03,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-10-13 06:46:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:46:04,119 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:46:04,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177472682] [2021-10-13 06:46:04,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177472682] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:46:04,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [981441295] [2021-10-13 06:46:04,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:46:04,120 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:46:04,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:46:04,122 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:46:04,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-10-13 06:46:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:46:04,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 06:46:04,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:46:05,510 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 15 treesize of output 11 [2021-10-13 06:46:06,077 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 06:46:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 06:46:06,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:46:06,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-10-13 06:46:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:46:06,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [981441295] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:46:06,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497372576] [2021-10-13 06:46:06,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:46:06,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:46:06,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:46:06,316 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:46:06,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-13 06:46:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:46:06,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 06:46:06,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:46:07,227 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 15 treesize of output 11 [2021-10-13 06:46:07,502 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 06:46:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:46:07,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:46:08,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-10-13 06:46:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 06:46:08,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497372576] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:46:08,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:46:08,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 16, 11, 14, 11] total 40 [2021-10-13 06:46:08,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337904826] [2021-10-13 06:46:08,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-13 06:46:08,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:46:08,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-13 06:46:08,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 06:46:08,574 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 40 states, 40 states have (on average 3.0) internal successors, (120), 40 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 06:46:11,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:46:11,807 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2021-10-13 06:46:11,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 06:46:11,808 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.0) internal successors, (120), 40 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) Word has length 39 [2021-10-13 06:46:11,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:46:11,809 INFO L225 Difference]: With dead ends: 74 [2021-10-13 06:46:11,809 INFO L226 Difference]: Without dead ends: 57 [2021-10-13 06:46:11,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 4186.3ms TimeCoverageRelationStatistics Valid=655, Invalid=2767, Unknown=0, NotChecked=0, Total=3422 [2021-10-13 06:46:11,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-13 06:46:11,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2021-10-13 06:46:11,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 54 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:46:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2021-10-13 06:46:11,829 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 39 [2021-10-13 06:46:11,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:46:11,829 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-10-13 06:46:11,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.0) internal successors, (120), 40 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 06:46:11,830 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2021-10-13 06:46:11,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-13 06:46:11,831 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:46:11,831 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:46:11,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-10-13 06:46:12,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-10-13 06:46:12,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-13 06:46:12,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:46:12,435 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:46:12,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:46:12,436 INFO L82 PathProgramCache]: Analyzing trace with hash 270533352, now seen corresponding path program 2 times [2021-10-13 06:46:12,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:46:12,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661386973] [2021-10-13 06:46:12,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:46:12,436 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:46:12,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:46:12,437 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:46:12,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-13 06:46:13,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:46:13,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:46:13,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:46:13,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:46:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-13 06:46:13,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:46:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-13 06:46:13,556 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:46:13,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661386973] [2021-10-13 06:46:13,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661386973] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:46:13,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1014571639] [2021-10-13 06:46:13,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:46:13,557 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:46:13,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:46:13,558 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:46:13,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-10-13 06:46:14,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:46:14,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:46:14,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:46:14,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:46:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-13 06:46:14,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:46:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-13 06:46:14,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1014571639] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:46:14,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849128413] [2021-10-13 06:46:14,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:46:14,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:46:14,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:46:14,782 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:46:14,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-13 06:46:15,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:46:15,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:46:15,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 06:46:15,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:46:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-13 06:46:15,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:46:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-13 06:46:15,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849128413] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 06:46:15,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 06:46:15,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 6, 6, 7] total 12 [2021-10-13 06:46:15,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959355823] [2021-10-13 06:46:15,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 06:46:15,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:46:15,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 06:46:15,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-13 06:46:15,899 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 06:46:15,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:46:15,982 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-10-13 06:46:15,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:46:15,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 46 [2021-10-13 06:46:15,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:46:15,983 INFO L225 Difference]: With dead ends: 55 [2021-10-13 06:46:15,983 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 06:46:15,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-13 06:46:15,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 06:46:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 06:46:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 06:46:15,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 06:46:15,985 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2021-10-13 06:46:15,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:46:15,985 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 06:46:15,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 06:46:15,986 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 06:46:15,986 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 06:46:15,988 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 06:46:16,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-13 06:46:16,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-10-13 06:46:16,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-10-13 06:46:16,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:46:16,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 06:46:16,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:46:16,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:46:16,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:46:16,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:46:16,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:46:16,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:46:16,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:46:16,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:46:16,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:46:16,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:46:16,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:46:16,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:46:23,519 INFO L860 garLoopResultBuilder]: At program point L572(line 572) the Hoare annotation is: true [2021-10-13 06:46:23,519 INFO L857 garLoopResultBuilder]: For program point L622-2(lines 622 627) no Hoare annotation was computed. [2021-10-13 06:46:23,519 INFO L853 garLoopResultBuilder]: At program point L622-3(lines 622 627) the Hoare annotation is: (let ((.cse16 (bvmul (_ bv2 32) ULTIMATE.start_main_~len~0))) (let ((.cse11 (= ULTIMATE.start_sll_get_data_at_~index (_ bv0 32))) (.cse0 (= ULTIMATE.start_main_~s~0.offset (_ bv0 32))) (.cse1 (= ULTIMATE.start_main_~s~0.offset ULTIMATE.start_sll_update_at_~head.offset)) (.cse2 (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_#res.base|))) (_ bv1 1)))) (.cse3 (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |#valid| ULTIMATE.start_node_create_~temp~0.base))))) (.cse4 (= .cse16 (bvadd (_ bv2 32) ULTIMATE.start_sll_update_at_~data))) (.cse5 (= ULTIMATE.start_main_~len~0 (_ bv2 32))) (.cse6 (= .cse16 (bvadd (select (select |#memory_int| ULTIMATE.start_main_~s~0.base) ULTIMATE.start_main_~s~0.offset) (_ bv2 32)))) (.cse7 (= |ULTIMATE.start_node_create_#res.offset| (_ bv0 32))) (.cse8 (= ULTIMATE.start_main_~len~0 (bvadd (_ bv2 32) ULTIMATE.start_sll_update_at_~index))) (.cse9 (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |#valid| ULTIMATE.start_sll_create_~head~0.base)))) (_ bv1 1)))) (.cse10 (= ULTIMATE.start_sll_create_~head~0.offset (_ bv0 32))) (.cse12 (= ULTIMATE.start_sll_update_at_~head.base ULTIMATE.start_main_~s~0.base)) (.cse13 (= |ULTIMATE.start_sll_create_#res.offset| (_ bv0 32))) (.cse14 (= (_ bv0 32) ULTIMATE.start_node_create_~temp~0.offset))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 (= (bvadd (_ bv2 32) ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~len~0) .cse9 .cse10 .cse11 .cse12 .cse13 .cse14) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_sll_get_data_at_~head.offset (_ bv0 32)) .cse5 .cse6 .cse7 .cse8 .cse9 (= ULTIMATE.start_main_~expected~0 (_ bv2 32)) .cse10 (not (bvsge ULTIMATE.start_main_~i~0 (_ bv0 32))) .cse11 (= (_ bv2 32) |ULTIMATE.start_sll_get_data_at_#res|) .cse12 .cse13 .cse14 (= (_ bv2 32) (select (select |#memory_int| ULTIMATE.start_sll_get_data_at_~head.base) ULTIMATE.start_sll_get_data_at_~head.offset))) (let ((.cse17 (bvadd (_ bv4 32) ULTIMATE.start_main_~s~0.offset))) (let ((.cse15 (bvadd (_ bv4 32) ULTIMATE.start_sll_create_~head~0.offset)) (.cse18 (select (select |#memory_$Pointer$.offset| ULTIMATE.start_main_~s~0.base) .cse17))) (and .cse0 .cse1 .cse2 .cse3 (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_create_#res.base|) (_ bv4 32)) (_ bv0 32)) .cse4 (not (= (select (select |#memory_$Pointer$.base| ULTIMATE.start_sll_create_~head~0.base) .cse15) ULTIMATE.start_sll_create_~head~0.base)) (= (select (select |#memory_$Pointer$.offset| ULTIMATE.start_sll_create_~head~0.base) .cse15) (_ bv0 32)) .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 (= (bvadd ULTIMATE.start_main_~i~0 (_ bv1 32)) ULTIMATE.start_main_~len~0) (= .cse16 (bvadd (_ bv1 32) (select (select |#memory_int| (select (select |#memory_$Pointer$.base| ULTIMATE.start_main_~s~0.base) .cse17)) .cse18))) (= .cse18 (_ bv0 32)) (not (= |ULTIMATE.start_sll_create_#res.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_create_#res.base|) (_ bv4 32)))) .cse12 .cse13 .cse14)))))) [2021-10-13 06:46:23,520 INFO L857 garLoopResultBuilder]: For program point L622-4(lines 622 627) no Hoare annotation was computed. [2021-10-13 06:46:23,520 INFO L853 garLoopResultBuilder]: At program point L581(lines 574 582) the Hoare annotation is: (let ((.cse0 (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_#res.base|))) (_ bv1 1)))) (.cse1 (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |#valid| ULTIMATE.start_node_create_~temp~0.base))))) (.cse2 (= ULTIMATE.start_main_~len~0 (_ bv2 32))) (.cse3 (= |ULTIMATE.start_node_create_#res.offset| (_ bv0 32))) (.cse4 (= ULTIMATE.start_sll_create_~head~0.offset (_ bv0 32))) (.cse5 (= (_ bv0 32) ULTIMATE.start_node_create_~temp~0.offset))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_sll_create_~len (_ bv2 32)) .cse5) (and .cse0 .cse1 .cse2 .cse3 (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |#valid| ULTIMATE.start_sll_create_~head~0.base)))) (_ bv1 1))) (not (= ULTIMATE.start_node_create_~temp~0.base ULTIMATE.start_sll_create_~head~0.base)) .cse4 (not (= ULTIMATE.start_sll_create_~head~0.base |ULTIMATE.start_node_create_#res.base|)) .cse5 (bvsgt ULTIMATE.start_sll_create_~len (_ bv0 32))))) [2021-10-13 06:46:23,520 INFO L857 garLoopResultBuilder]: For program point L606(lines 1 632) no Hoare annotation was computed. [2021-10-13 06:46:23,520 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 06:46:23,520 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 06:46:23,520 INFO L860 garLoopResultBuilder]: At program point L631(lines 613 632) the Hoare annotation is: true [2021-10-13 06:46:23,520 INFO L853 garLoopResultBuilder]: At program point L590(lines 583 591) the Hoare annotation is: (let ((.cse0 (bvadd (_ bv4 32) ULTIMATE.start_sll_create_~head~0.offset))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_#res.base|))) (_ bv1 1))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |#valid| ULTIMATE.start_node_create_~temp~0.base)))) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_create_#res.base|) (_ bv4 32)) (_ bv0 32)) (not (= (select (select |#memory_$Pointer$.base| ULTIMATE.start_sll_create_~head~0.base) .cse0) ULTIMATE.start_sll_create_~head~0.base)) (= (select (select |#memory_$Pointer$.offset| ULTIMATE.start_sll_create_~head~0.base) .cse0) (_ bv0 32)) (= ULTIMATE.start_main_~len~0 (_ bv2 32)) (= |ULTIMATE.start_node_create_#res.offset| (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |#valid| ULTIMATE.start_sll_create_~head~0.base)))) (_ bv1 1))) (= ULTIMATE.start_sll_create_~head~0.offset (_ bv0 32)) (not (= |ULTIMATE.start_sll_create_#res.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_create_#res.base|) (_ bv4 32)))) (= |ULTIMATE.start_sll_create_#res.offset| (_ bv0 32)) (= (_ bv0 32) ULTIMATE.start_node_create_~temp~0.offset))) [2021-10-13 06:46:23,520 INFO L853 garLoopResultBuilder]: At program point L607-2(lines 607 610) the Hoare annotation is: (let ((.cse17 (bvadd ULTIMATE.start_main_~i~0 (_ bv1 32))) (.cse5 (bvmul (_ bv2 32) ULTIMATE.start_main_~len~0)) (.cse22 (bvadd (_ bv4 32) ULTIMATE.start_sll_create_~head~0.offset)) (.cse23 (select |#memory_$Pointer$.base| ULTIMATE.start_main_~s~0.base)) (.cse24 (select |#memory_$Pointer$.offset| ULTIMATE.start_main_~s~0.base)) (.cse25 (bvadd (_ bv4 32) ULTIMATE.start_main_~s~0.offset))) (let ((.cse12 (select .cse24 .cse25)) (.cse10 (select .cse23 .cse25)) (.cse18 (= (select .cse24 (_ bv4 32)) (_ bv0 32))) (.cse0 (= ULTIMATE.start_main_~s~0.offset (_ bv0 32))) (.cse1 (= ULTIMATE.start_main_~s~0.offset ULTIMATE.start_sll_update_at_~head.offset)) (.cse2 (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_#res.base|))) (_ bv1 1)))) (.cse3 (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |#valid| ULTIMATE.start_node_create_~temp~0.base))))) (.cse19 (not (= ULTIMATE.start_main_~s~0.base (select .cse23 (_ bv4 32))))) (.cse4 (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_create_#res.base|) (_ bv4 32)) (_ bv0 32))) (.cse6 (not (= (select (select |#memory_$Pointer$.base| ULTIMATE.start_sll_create_~head~0.base) .cse22) ULTIMATE.start_sll_create_~head~0.base))) (.cse7 (= (select (select |#memory_$Pointer$.offset| ULTIMATE.start_sll_create_~head~0.base) .cse22) (_ bv0 32))) (.cse20 (= .cse5 (bvadd (_ bv1 32) ULTIMATE.start_sll_update_at_~data))) (.cse8 (= |ULTIMATE.start_node_create_#res.offset| (_ bv0 32))) (.cse9 (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |#valid| ULTIMATE.start_sll_create_~head~0.base)))) (_ bv1 1)))) (.cse11 (= ULTIMATE.start_sll_create_~head~0.offset (_ bv0 32))) (.cse21 (= .cse17 ULTIMATE.start_main_~len~0)) (.cse13 (not (= |ULTIMATE.start_sll_create_#res.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_create_#res.base|) (_ bv4 32))))) (.cse14 (= ULTIMATE.start_sll_update_at_~head.base ULTIMATE.start_main_~s~0.base)) (.cse15 (= |ULTIMATE.start_sll_create_#res.offset| (_ bv0 32))) (.cse16 (= (_ bv0 32) ULTIMATE.start_node_create_~temp~0.offset))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= .cse5 (bvadd (_ bv2 32) ULTIMATE.start_sll_update_at_~data)) .cse6 .cse7 .cse8 (= ULTIMATE.start_main_~len~0 (bvadd (_ bv2 32) ULTIMATE.start_sll_update_at_~index)) (= (bvadd (_ bv2 32) ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~len~0) .cse9 (not (= ULTIMATE.start_main_~s~0.base .cse10)) (not (bvsgt ULTIMATE.start_sll_update_at_~index (_ bv0 32))) .cse11 (= .cse5 (bvadd (_ bv1 32) (select (select |#memory_int| .cse10) .cse12))) (= .cse12 (_ bv0 32)) .cse13 .cse14 .cse15 .cse16 (bvsgt .cse17 (_ bv0 32))) (and .cse18 .cse0 .cse2 .cse3 .cse19 .cse4 .cse6 (= .cse12 ULTIMATE.start_sll_update_at_~head.offset) .cse7 .cse20 .cse8 (= ULTIMATE.start_main_~i~0 (bvadd (_ bv1 32) ULTIMATE.start_sll_update_at_~index)) .cse9 .cse11 .cse21 .cse13 (= (_ bv0 32) ULTIMATE.start_sll_update_at_~index) .cse15 (= ULTIMATE.start_sll_update_at_~head.base .cse10) .cse16) (and .cse18 .cse0 .cse1 .cse2 .cse3 .cse19 .cse4 .cse6 .cse7 (= ULTIMATE.start_main_~len~0 (_ bv2 32)) .cse20 .cse8 .cse9 .cse11 .cse21 .cse13 (= (_ bv1 32) ULTIMATE.start_sll_update_at_~index) .cse14 .cse15 .cse16)))) [2021-10-13 06:46:23,520 INFO L857 garLoopResultBuilder]: For program point L607-3(lines 607 610) no Hoare annotation was computed. [2021-10-13 06:46:23,521 INFO L857 garLoopResultBuilder]: For program point L624(lines 624 626) no Hoare annotation was computed. [2021-10-13 06:46:23,521 INFO L853 garLoopResultBuilder]: At program point L600-2(lines 600 603) the Hoare annotation is: (let ((.cse29 (bvadd (_ bv4 32) ULTIMATE.start_main_~s~0.offset))) (let ((.cse27 (bvmul (_ bv2 32) ULTIMATE.start_main_~len~0)) (.cse28 (select (select |#memory_$Pointer$.offset| ULTIMATE.start_main_~s~0.base) .cse29)) (.cse30 (bvadd (_ bv4 32) ULTIMATE.start_sll_create_~head~0.offset))) (let ((.cse4 (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_create_#res.base|) (_ bv4 32)) (_ bv0 32))) (.cse7 (not (= (select (select |#memory_$Pointer$.base| ULTIMATE.start_sll_create_~head~0.base) .cse30) ULTIMATE.start_sll_create_~head~0.base))) (.cse8 (= (select (select |#memory_$Pointer$.offset| ULTIMATE.start_sll_create_~head~0.base) .cse30) (_ bv0 32))) (.cse11 (= ULTIMATE.start_main_~len~0 (_ bv2 32))) (.cse17 (= (bvadd ULTIMATE.start_main_~i~0 (_ bv1 32)) ULTIMATE.start_main_~len~0)) (.cse18 (= .cse27 (bvadd (_ bv1 32) (select (select |#memory_int| (select (select |#memory_$Pointer$.base| ULTIMATE.start_main_~s~0.base) .cse29)) .cse28)))) (.cse19 (= .cse28 (_ bv0 32))) (.cse20 (not (= |ULTIMATE.start_sll_create_#res.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_create_#res.base|) (_ bv4 32))))) (.cse0 (= ULTIMATE.start_main_~s~0.offset (_ bv0 32))) (.cse1 (= ULTIMATE.start_main_~s~0.offset ULTIMATE.start_sll_update_at_~head.offset)) (.cse2 (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_#res.base|))) (_ bv1 1)))) (.cse3 (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |#valid| ULTIMATE.start_node_create_~temp~0.base))))) (.cse5 (= .cse27 (bvadd (_ bv2 32) ULTIMATE.start_sll_update_at_~data))) (.cse10 (= ULTIMATE.start_sll_get_data_at_~head.offset (_ bv0 32))) (.cse12 (= .cse27 (bvadd (select (select |#memory_int| ULTIMATE.start_main_~s~0.base) ULTIMATE.start_main_~s~0.offset) (_ bv2 32)))) (.cse13 (= |ULTIMATE.start_node_create_#res.offset| (_ bv0 32))) (.cse14 (= ULTIMATE.start_main_~len~0 (bvadd (_ bv2 32) ULTIMATE.start_sll_update_at_~index))) (.cse15 (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |#valid| ULTIMATE.start_sll_create_~head~0.base)))) (_ bv1 1)))) (.cse16 (= ULTIMATE.start_sll_create_~head~0.offset (_ bv0 32))) (.cse21 (= ULTIMATE.start_sll_get_data_at_~index (_ bv0 32))) (.cse22 (= ULTIMATE.start_sll_update_at_~head.base ULTIMATE.start_main_~s~0.base)) (.cse23 (= |ULTIMATE.start_sll_create_#res.offset| (_ bv0 32))) (.cse24 (= (_ bv0 32) ULTIMATE.start_node_create_~temp~0.offset)) (.cse9 (select (select |#memory_int| ULTIMATE.start_sll_get_data_at_~head.base) ULTIMATE.start_sll_get_data_at_~head.offset))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (exists ((ULTIMATE.start_main_~i~0 (_ BitVec 32))) (let ((.cse6 (bvmul (_ bv2 32) ULTIMATE.start_main_~i~0))) (and (= (bvadd (select (select |#memory_int| ULTIMATE.start_sll_get_data_at_~head.base) ULTIMATE.start_sll_get_data_at_~head.offset) (_ bv1 32) .cse6) (bvmul (_ bv2 32) ULTIMATE.start_main_~expected~0)) (= (bvadd (_ bv1 32) .cse6) ULTIMATE.start_main_~expected~0)))) .cse7 .cse8 (= (_ bv3 32) .cse9) .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 .cse16 .cse17 .cse18 .cse19 .cse20 .cse21 .cse22 .cse23 .cse24) (let ((.cse25 (select (select |#memory_$Pointer$.offset| ULTIMATE.start_sll_get_data_at_~head.base) (_ bv4 32))) (.cse26 (select (select |#memory_$Pointer$.base| ULTIMATE.start_sll_get_data_at_~head.base) (_ bv4 32)))) (and (= ULTIMATE.start_sll_get_data_at_~index (_ bv1 32)) .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~expected~0 (_ bv3 32)) .cse3 .cse4 .cse5 .cse7 .cse8 (= .cse25 (_ bv0 32)) .cse10 .cse11 .cse12 (= (_ bv3 32) (select (select |#memory_int| .cse26) .cse25)) .cse13 .cse14 .cse15 .cse16 .cse17 .cse18 .cse19 .cse20 .cse22 .cse23 (not (= .cse26 ULTIMATE.start_sll_get_data_at_~head.base)) .cse24)) (and .cse0 (bvsge ULTIMATE.start_main_~i~0 (_ bv0 32)) .cse1 .cse2 .cse3 .cse5 .cse10 .cse12 .cse13 .cse14 (= (bvadd (_ bv2 32) ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~len~0) .cse15 (not (bvsgt ULTIMATE.start_sll_update_at_~index (_ bv0 32))) (= ULTIMATE.start_main_~expected~0 (_ bv2 32)) .cse16 .cse21 .cse22 .cse23 .cse24 (= (_ bv2 32) .cse9)))))) [2021-10-13 06:46:23,522 INFO L857 garLoopResultBuilder]: For program point L600-3(lines 600 603) no Hoare annotation was computed. [2021-10-13 06:46:23,522 INFO L853 garLoopResultBuilder]: At program point L625(lines 613 632) the Hoare annotation is: false [2021-10-13 06:46:23,522 INFO L857 garLoopResultBuilder]: For program point L592(lines 592 598) no Hoare annotation was computed. [2021-10-13 06:46:23,522 INFO L857 garLoopResultBuilder]: For program point L576(lines 576 578) no Hoare annotation was computed. [2021-10-13 06:46:23,522 INFO L857 garLoopResultBuilder]: For program point L576-1(lines 576 578) no Hoare annotation was computed. [2021-10-13 06:46:23,522 INFO L860 garLoopResultBuilder]: At program point L593-2(lines 593 597) the Hoare annotation is: true [2021-10-13 06:46:23,523 INFO L853 garLoopResultBuilder]: At program point L618-2(lines 618 621) the Hoare annotation is: (let ((.cse0 (select |#memory_$Pointer$.offset| ULTIMATE.start_main_~s~0.base)) (.cse4 (select |#memory_$Pointer$.base| ULTIMATE.start_main_~s~0.base)) (.cse23 (bvadd (_ bv4 32) ULTIMATE.start_main_~s~0.offset))) (let ((.cse17 (bvmul (_ bv2 32) ULTIMATE.start_main_~len~0)) (.cse18 (select .cse4 .cse23)) (.cse16 (select .cse0 .cse23)) (.cse12 (bvadd ULTIMATE.start_main_~i~0 (_ bv1 32))) (.cse22 (bvadd (_ bv4 32) ULTIMATE.start_sll_create_~head~0.offset))) (let ((.cse1 (= ULTIMATE.start_main_~s~0.offset (_ bv0 32))) (.cse2 (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_#res.base|))) (_ bv1 1)))) (.cse3 (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |#valid| ULTIMATE.start_node_create_~temp~0.base))))) (.cse5 (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_create_#res.base|) (_ bv4 32)) (_ bv0 32))) (.cse6 (not (= (select (select |#memory_$Pointer$.base| ULTIMATE.start_sll_create_~head~0.base) .cse22) ULTIMATE.start_sll_create_~head~0.base))) (.cse7 (= (select (select |#memory_$Pointer$.offset| ULTIMATE.start_sll_create_~head~0.base) .cse22) (_ bv0 32))) (.cse8 (= ULTIMATE.start_main_~len~0 (_ bv2 32))) (.cse21 (bvsgt .cse12 (_ bv0 32))) (.cse9 (= |ULTIMATE.start_node_create_#res.offset| (_ bv0 32))) (.cse10 (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |#valid| ULTIMATE.start_sll_create_~head~0.base)))) (_ bv1 1)))) (.cse11 (= ULTIMATE.start_sll_create_~head~0.offset (_ bv0 32))) (.cse19 (= .cse17 (bvadd (_ bv1 32) (select (select |#memory_int| .cse18) .cse16)))) (.cse20 (= .cse16 (_ bv0 32))) (.cse13 (not (= |ULTIMATE.start_sll_create_#res.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_create_#res.base|) (_ bv4 32))))) (.cse14 (= |ULTIMATE.start_sll_create_#res.offset| (_ bv0 32))) (.cse15 (= (_ bv0 32) ULTIMATE.start_node_create_~temp~0.offset))) (or (and (= (select .cse0 (_ bv4 32)) (_ bv0 32)) .cse1 .cse2 .cse3 (not (= ULTIMATE.start_main_~s~0.base (select .cse4 (_ bv4 32)))) .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 (= .cse12 ULTIMATE.start_main_~len~0) .cse13 .cse14 .cse15) (and .cse1 .cse2 .cse3 .cse5 .cse6 (= .cse16 ULTIMATE.start_sll_update_at_~head.offset) .cse7 .cse8 (= .cse17 (bvadd (_ bv1 32) ULTIMATE.start_sll_update_at_~data)) .cse9 .cse10 (not (= ULTIMATE.start_main_~s~0.base .cse18)) (not (bvsgt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~i~0) (_ bv0 32))) .cse11 .cse19 .cse20 .cse13 (= (_ bv0 32) ULTIMATE.start_sll_update_at_~index) .cse14 (= ULTIMATE.start_sll_update_at_~head.base .cse18) .cse15 .cse21) (and (bvsgt (bvadd (_ bv2 32) ULTIMATE.start_main_~i~0) (_ bv0 32)) .cse1 (= ULTIMATE.start_main_~s~0.offset ULTIMATE.start_sll_update_at_~head.offset) .cse2 .cse3 .cse5 (= .cse17 (bvadd (_ bv2 32) ULTIMATE.start_sll_update_at_~data)) .cse6 .cse7 .cse8 (= .cse17 (bvadd (select (select |#memory_int| ULTIMATE.start_main_~s~0.base) ULTIMATE.start_main_~s~0.offset) (_ bv2 32))) (not .cse21) .cse9 (= ULTIMATE.start_main_~len~0 (bvadd (_ bv2 32) ULTIMATE.start_sll_update_at_~index)) .cse10 .cse11 .cse19 .cse20 .cse13 (= ULTIMATE.start_sll_update_at_~head.base ULTIMATE.start_main_~s~0.base) .cse14 .cse15))))) [2021-10-13 06:46:23,523 INFO L857 garLoopResultBuilder]: For program point L585-2(lines 585 589) no Hoare annotation was computed. [2021-10-13 06:46:23,523 INFO L857 garLoopResultBuilder]: For program point L618-3(lines 618 621) no Hoare annotation was computed. [2021-10-13 06:46:23,523 INFO L853 garLoopResultBuilder]: At program point L585-3(lines 585 589) the Hoare annotation is: (let ((.cse2 (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_#res.base|))) (_ bv1 1)))) (.cse3 (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |#valid| ULTIMATE.start_node_create_~temp~0.base))))) (.cse0 (= ULTIMATE.start_main_~len~0 (_ bv2 32))) (.cse5 (= |ULTIMATE.start_node_create_#res.offset| (_ bv0 32))) (.cse6 (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |#valid| ULTIMATE.start_sll_create_~head~0.base)))) (_ bv1 1)))) (.cse1 (= ULTIMATE.start_sll_create_~head~0.offset (_ bv0 32))) (.cse7 (= (_ bv0 32) ULTIMATE.start_node_create_~temp~0.offset))) (or (and .cse0 .cse1 (= ULTIMATE.start_sll_create_~len (_ bv2 32))) (let ((.cse4 (bvadd (_ bv4 32) ULTIMATE.start_sll_create_~head~0.offset))) (and .cse2 .cse3 (not (= (select (select |#memory_$Pointer$.base| ULTIMATE.start_sll_create_~head~0.base) .cse4) ULTIMATE.start_sll_create_~head~0.base)) (= (select (select |#memory_$Pointer$.offset| ULTIMATE.start_sll_create_~head~0.base) .cse4) (_ bv0 32)) .cse0 .cse5 .cse6 .cse1 .cse7)) (and .cse2 .cse3 .cse0 .cse5 .cse6 .cse1 .cse7 (bvsgt ULTIMATE.start_sll_create_~len (_ bv0 32))))) [2021-10-13 06:46:23,523 INFO L857 garLoopResultBuilder]: For program point L585-4(lines 585 589) no Hoare annotation was computed. [2021-10-13 06:46:23,523 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 06:46:23,523 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 630) no Hoare annotation was computed. [2021-10-13 06:46:23,523 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 06:46:23,524 INFO L853 garLoopResultBuilder]: At program point L604(lines 599 605) the Hoare annotation is: (let ((.cse18 (bvmul (_ bv2 32) ULTIMATE.start_main_~len~0))) (let ((.cse0 (= ULTIMATE.start_main_~s~0.offset (_ bv0 32))) (.cse1 (= ULTIMATE.start_main_~s~0.offset ULTIMATE.start_sll_update_at_~head.offset)) (.cse2 (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_#res.base|))) (_ bv1 1)))) (.cse3 (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |#valid| ULTIMATE.start_node_create_~temp~0.base))))) (.cse4 (= .cse18 (bvadd (_ bv2 32) ULTIMATE.start_sll_update_at_~data))) (.cse15 (select (select |#memory_int| ULTIMATE.start_sll_get_data_at_~head.base) ULTIMATE.start_sll_get_data_at_~head.offset)) (.cse5 (= ULTIMATE.start_sll_get_data_at_~head.offset (_ bv0 32))) (.cse6 (= .cse18 (bvadd (select (select |#memory_int| ULTIMATE.start_main_~s~0.base) ULTIMATE.start_main_~s~0.offset) (_ bv2 32)))) (.cse7 (= |ULTIMATE.start_node_create_#res.offset| (_ bv0 32))) (.cse8 (= ULTIMATE.start_main_~len~0 (bvadd (_ bv2 32) ULTIMATE.start_sll_update_at_~index))) (.cse9 (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |#valid| ULTIMATE.start_sll_create_~head~0.base)))) (_ bv1 1)))) (.cse10 (= ULTIMATE.start_sll_create_~head~0.offset (_ bv0 32))) (.cse11 (= ULTIMATE.start_sll_get_data_at_~index (_ bv0 32))) (.cse12 (= ULTIMATE.start_sll_update_at_~head.base ULTIMATE.start_main_~s~0.base)) (.cse13 (= |ULTIMATE.start_sll_create_#res.offset| (_ bv0 32))) (.cse14 (= (_ bv0 32) ULTIMATE.start_node_create_~temp~0.offset))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (bvsge ULTIMATE.start_sll_update_at_~index (_ bv0 32)) .cse5 .cse6 .cse7 .cse8 (= (bvadd (_ bv2 32) ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~len~0) .cse9 (= ULTIMATE.start_main_~expected~0 (_ bv2 32)) .cse10 .cse11 (= (_ bv2 32) |ULTIMATE.start_sll_get_data_at_#res|) .cse12 (not (bvsge (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~i~0) (_ bv0 32))) .cse13 .cse14 (= (_ bv2 32) .cse15)) (let ((.cse19 (bvadd (_ bv4 32) ULTIMATE.start_main_~s~0.offset))) (let ((.cse17 (bvadd (_ bv4 32) ULTIMATE.start_sll_create_~head~0.offset)) (.cse20 (select (select |#memory_$Pointer$.offset| ULTIMATE.start_main_~s~0.base) .cse19))) (and .cse0 .cse1 .cse2 .cse3 (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_create_#res.base|) (_ bv4 32)) (_ bv0 32)) .cse4 (exists ((ULTIMATE.start_main_~i~0 (_ BitVec 32))) (let ((.cse16 (bvmul (_ bv2 32) ULTIMATE.start_main_~i~0))) (and (= (bvadd (select (select |#memory_int| ULTIMATE.start_sll_get_data_at_~head.base) ULTIMATE.start_sll_get_data_at_~head.offset) (_ bv1 32) .cse16) (bvmul (_ bv2 32) ULTIMATE.start_main_~expected~0)) (= (bvadd (_ bv1 32) .cse16) ULTIMATE.start_main_~expected~0)))) (not (= (select (select |#memory_$Pointer$.base| ULTIMATE.start_sll_create_~head~0.base) .cse17) ULTIMATE.start_sll_create_~head~0.base)) (= (_ bv3 32) |ULTIMATE.start_sll_get_data_at_#res|) (= (select (select |#memory_$Pointer$.offset| ULTIMATE.start_sll_create_~head~0.base) .cse17) (_ bv0 32)) (= (_ bv3 32) .cse15) .cse5 (= ULTIMATE.start_main_~len~0 (_ bv2 32)) .cse6 .cse7 .cse8 .cse9 .cse10 (= (bvadd ULTIMATE.start_main_~i~0 (_ bv1 32)) ULTIMATE.start_main_~len~0) (= .cse18 (bvadd (_ bv1 32) (select (select |#memory_int| (select (select |#memory_$Pointer$.base| ULTIMATE.start_main_~s~0.base) .cse19)) .cse20))) (= .cse20 (_ bv0 32)) (not (= |ULTIMATE.start_sll_create_#res.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_create_#res.base|) (_ bv4 32)))) .cse11 .cse12 .cse13 .cse14)))))) [2021-10-13 06:46:23,527 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 06:46:23,535 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: translation of (bvneg (_ BitVec 1) (_ BitVec 1)) not yet implemented, please contact Matthias at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:211) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:394) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:1) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpression(ModelTranslationContainer.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpressionToString(ModelTranslationContainer.java:89) at de.uni_freiburg.informatik.ultimate.core.lib.results.InvariantResult.getLongDescription(InvariantResult.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.createInvariantResults(TraceAbstractionStarter.java:452) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:192) 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 06:46:23,538 INFO L168 Benchmark]: Toolchain (without parser) took 92648.37 ms. Allocated memory was 65.0 MB in the beginning and 111.1 MB in the end (delta: 46.1 MB). Free memory was 44.3 MB in the beginning and 49.1 MB in the end (delta: -4.8 MB). Peak memory consumption was 67.7 MB. Max. memory is 16.1 GB. [2021-10-13 06:46:23,539 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 65.0 MB. Free memory is still 46.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:46:23,539 INFO L168 Benchmark]: CACSL2BoogieTranslator took 529.03 ms. Allocated memory is still 65.0 MB. Free memory was 44.1 MB in the beginning and 40.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 06:46:23,539 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.74 ms. Allocated memory is still 65.0 MB. Free memory was 39.9 MB in the beginning and 37.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:46:23,539 INFO L168 Benchmark]: Boogie Preprocessor took 42.91 ms. Allocated memory is still 65.0 MB. Free memory was 37.8 MB in the beginning and 36.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:46:23,540 INFO L168 Benchmark]: RCFGBuilder took 632.15 ms. Allocated memory was 65.0 MB in the beginning and 92.3 MB in the end (delta: 27.3 MB). Free memory was 36.0 MB in the beginning and 66.1 MB in the end (delta: -30.0 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-10-13 06:46:23,540 INFO L168 Benchmark]: TraceAbstraction took 91370.27 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 65.7 MB in the beginning and 49.1 MB in the end (delta: 16.6 MB). Peak memory consumption was 62.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:46:23,542 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 65.0 MB. Free memory is still 46.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 529.03 ms. Allocated memory is still 65.0 MB. Free memory was 44.1 MB in the beginning and 40.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 67.74 ms. Allocated memory is still 65.0 MB. Free memory was 39.9 MB in the beginning and 37.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.91 ms. Allocated memory is still 65.0 MB. Free memory was 37.8 MB in the beginning and 36.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 632.15 ms. Allocated memory was 65.0 MB in the beginning and 92.3 MB in the end (delta: 27.3 MB). Free memory was 36.0 MB in the beginning and 66.1 MB in the end (delta: -30.0 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 91370.27 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 65.7 MB in the beginning and 49.1 MB in the end (delta: 16.6 MB). Peak memory consumption was 62.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 630]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 91274.4ms, OverallIterations: 12, TraceHistogramMax: 3, EmptinessCheckTime: 39.4ms, AutomataDifference: 18706.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 6912.6ms, InitialAbstractionConstructionTime: 12.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 253 SDtfs, 1689 SDslu, 1116 SDs, 0 SdLazy, 1705 SolverSat, 615 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6941.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1809 GetRequests, 1527 SyntacticMatches, 6 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3428 ImplicationChecksByTransitivity, 42160.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=9, InterpolantAutomatonStates: 127, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 185.1ms AutomataMinimizationTime, 12 MinimizatonAttempts, 138 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 12 LocationsWithAnnotation, 12 PreInvPairs, 32 NumberOfFragments, 2178 HoareAnnotationTreeSize, 12 FomulaSimplifications, 8272 FormulaSimplificationTreeSizeReduction, 404.9ms HoareSimplificationTime, 12 FomulaSimplificationsInter, 615 FormulaSimplificationTreeSizeReductionInter, 6498.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 398.2ms SsaConstructionTime, 2531.7ms SatisfiabilityAnalysisTime, 48091.7ms InterpolantComputationTime, 886 NumberOfCodeBlocks, 847 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 1720 ConstructedInterpolants, 41 QuantifiedInterpolants, 12171 SizeOfPredicates, 261 NumberOfNonLiveVariables, 3323 ConjunctsInSsa, 368 ConjunctsInUnsatCore, 52 InterpolantComputations, 12 PerfectInterpolantSequences, 772/1042 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: 1 - ExceptionOrErrorResult: UnsupportedOperationException: translation of (bvneg (_ BitVec 1) (_ BitVec 1)) not yet implemented, please contact Matthias de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: translation of (bvneg (_ BitVec 1) (_ BitVec 1)) not yet implemented, please contact Matthias: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:211) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 06:46:23,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8fb4976-62e2-4c2c-af3f-d35496f10841/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...