./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/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_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e872a0dffbf376eb2d8b1e3516401a8dafe115a6 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/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_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e872a0dffbf376eb2d8b1e3516401a8dafe115a6 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:23:31,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:23:31,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:23:31,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:23:31,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:23:31,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:23:31,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:23:31,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:23:31,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:23:31,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:23:31,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:23:31,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:23:31,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:23:31,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:23:31,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:23:31,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:23:31,857 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:23:31,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:23:31,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:23:31,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:23:31,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:23:31,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:23:31,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:23:31,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:23:31,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:23:31,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:23:31,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:23:31,887 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:23:31,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:23:31,889 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:23:31,889 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:23:31,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:23:31,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:23:31,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:23:31,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:23:31,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:23:31,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:23:31,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:23:31,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:23:31,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:23:31,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:23:31,897 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 07:23:31,932 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:23:31,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:23:31,938 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:23:31,938 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:23:31,938 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:23:31,945 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:23:31,945 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:23:31,945 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:23:31,946 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:23:31,946 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:23:31,947 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:23:31,947 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:23:31,948 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:23:31,948 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:23:31,948 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:23:31,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:23:31,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:23:31,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:23:31,950 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:23:31,950 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:23:31,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:23:31,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:23:31,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:23:31,951 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:23:31,952 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:23:31,952 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:23:31,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:23:31,954 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:23:31,954 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:23:31,954 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:23:31,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:23:31,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:23:31,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:23:31,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:23:31,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:23:31,956 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:23:31,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:23:31,956 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:23:31,956 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:23:31,957 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_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e872a0dffbf376eb2d8b1e3516401a8dafe115a6 [2021-10-13 07:23:32,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:23:32,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:23:32,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:23:32,340 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:23:32,341 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:23:32,342 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2021-10-13 07:23:32,433 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/data/260e09627/9f151216092f4a13ac48645b623b0aa2/FLAGdac78a684 [2021-10-13 07:23:32,902 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:23:32,903 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2021-10-13 07:23:32,909 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/data/260e09627/9f151216092f4a13ac48645b623b0aa2/FLAGdac78a684 [2021-10-13 07:23:33,290 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/data/260e09627/9f151216092f4a13ac48645b623b0aa2 [2021-10-13 07:23:33,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:23:33,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:23:33,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:23:33,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:23:33,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:23:33,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:23:33" (1/1) ... [2021-10-13 07:23:33,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49bac843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:33, skipping insertion in model container [2021-10-13 07:23:33,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:23:33" (1/1) ... [2021-10-13 07:23:33,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:23:33,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:23:33,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:23:33,597 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:23:33,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:23:33,634 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:23:33,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:33 WrapperNode [2021-10-13 07:23:33,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:23:33,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:23:33,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:23:33,637 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:23:33,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:33" (1/1) ... [2021-10-13 07:23:33,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:33" (1/1) ... [2021-10-13 07:23:33,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:23:33,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:23:33,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:23:33,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:23:33,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:33" (1/1) ... [2021-10-13 07:23:33,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:33" (1/1) ... [2021-10-13 07:23:33,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:33" (1/1) ... [2021-10-13 07:23:33,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:33" (1/1) ... [2021-10-13 07:23:33,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:33" (1/1) ... [2021-10-13 07:23:33,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:33" (1/1) ... [2021-10-13 07:23:33,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:33" (1/1) ... [2021-10-13 07:23:33,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:23:33,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:23:33,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:23:33,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:23:33,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:33" (1/1) ... [2021-10-13 07:23:33,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:23:33,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:23:33,779 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:23:33,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:23:33,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:23:33,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:23:33,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:23:33,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:23:33,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:23:33,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:23:34,295 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:23:34,295 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-13 07:23:34,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:23:34 BoogieIcfgContainer [2021-10-13 07:23:34,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:23:34,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:23:34,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:23:34,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:23:34,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:23:33" (1/3) ... [2021-10-13 07:23:34,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307e554d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:23:34, skipping insertion in model container [2021-10-13 07:23:34,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:33" (2/3) ... [2021-10-13 07:23:34,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307e554d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:23:34, skipping insertion in model container [2021-10-13 07:23:34,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:23:34" (3/3) ... [2021-10-13 07:23:34,311 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers2.c [2021-10-13 07:23:34,316 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:23:34,317 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-10-13 07:23:34,370 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:23:34,380 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:23:34,381 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-10-13 07:23:34,407 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 8 states have (on average 2.375) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:23:34,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:23:34,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:23:34,415 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:23:34,416 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:23:34,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:23:34,423 INFO L82 PathProgramCache]: Analyzing trace with hash 86812, now seen corresponding path program 1 times [2021-10-13 07:23:34,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:23:34,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718571486] [2021-10-13 07:23:34,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:23:34,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:23:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:23:34,602 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 07:23:34,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:23:34,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718571486] [2021-10-13 07:23:34,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718571486] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:23:34,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:23:34,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:23:34,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103029936] [2021-10-13 07:23:34,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:23:34,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:23:34,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:23:34,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:23:34,634 INFO L87 Difference]: Start difference. First operand has 18 states, 8 states have (on average 2.375) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 07:23:34,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:23:34,680 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-10-13 07:23:34,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:23:34,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-10-13 07:23:34,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:23:34,692 INFO L225 Difference]: With dead ends: 17 [2021-10-13 07:23:34,692 INFO L226 Difference]: Without dead ends: 16 [2021-10-13 07:23:34,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:23:34,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-13 07:23:34,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-13 07:23:34,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 2.125) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 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 07:23:34,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-13 07:23:34,727 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 3 [2021-10-13 07:23:34,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:23:34,728 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-13 07:23:34,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 07:23:34,728 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-13 07:23:34,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:23:34,729 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:23:34,729 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:23:34,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:23:34,730 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:23:34,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:23:34,731 INFO L82 PathProgramCache]: Analyzing trace with hash 86813, now seen corresponding path program 1 times [2021-10-13 07:23:34,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:23:34,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834787066] [2021-10-13 07:23:34,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:23:34,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:23:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:23:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:34,791 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:23:34,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834787066] [2021-10-13 07:23:34,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834787066] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:23:34,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:23:34,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:23:34,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256383997] [2021-10-13 07:23:34,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:23:34,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:23:34,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:23:34,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:23:34,796 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 07:23:34,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:23:34,824 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-10-13 07:23:34,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:23:34,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-10-13 07:23:34,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:23:34,826 INFO L225 Difference]: With dead ends: 18 [2021-10-13 07:23:34,826 INFO L226 Difference]: Without dead ends: 18 [2021-10-13 07:23:34,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:23:34,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-13 07:23:34,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-13 07:23:34,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.9) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:23:34,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-13 07:23:34,832 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 3 [2021-10-13 07:23:34,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:23:34,832 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-13 07:23:34,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 07:23:34,833 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-13 07:23:34,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:23:34,834 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:23:34,834 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-13 07:23:34,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:23:34,834 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:23:34,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:23:34,835 INFO L82 PathProgramCache]: Analyzing trace with hash 83467978, now seen corresponding path program 1 times [2021-10-13 07:23:34,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:23:34,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873441937] [2021-10-13 07:23:34,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:23:34,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:23:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:23:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:34,955 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:23:34,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873441937] [2021-10-13 07:23:34,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873441937] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:23:34,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:23:34,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:23:34,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109125965] [2021-10-13 07:23:34,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:23:34,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:23:34,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:23:34,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:23:34,965 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:23:35,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:23:35,021 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-10-13 07:23:35,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:23:35,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 07:23:35,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:23:35,022 INFO L225 Difference]: With dead ends: 17 [2021-10-13 07:23:35,023 INFO L226 Difference]: Without dead ends: 17 [2021-10-13 07:23:35,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:23:35,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-13 07:23:35,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-10-13 07:23:35,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 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 07:23:35,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-13 07:23:35,027 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 5 [2021-10-13 07:23:35,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:23:35,027 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-13 07:23:35,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:23:35,028 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-13 07:23:35,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:23:35,028 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:23:35,029 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:23:35,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:23:35,029 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:23:35,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:23:35,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1707408379, now seen corresponding path program 1 times [2021-10-13 07:23:35,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:23:35,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697763523] [2021-10-13 07:23:35,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:23:35,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:23:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:23:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:35,085 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:23:35,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697763523] [2021-10-13 07:23:35,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697763523] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:23:35,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65647618] [2021-10-13 07:23:35,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:23:35,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:23:35,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:23:35,101 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:23:35,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:23:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:23:35,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:23:35,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:23:35,232 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 07:23:35,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:23:35,293 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 07:23:35,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65647618] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:23:35,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:23:35,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2021-10-13 07:23:35,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10465510] [2021-10-13 07:23:35,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:23:35,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:23:35,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:23:35,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:23:35,307 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:23:35,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:23:35,361 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-10-13 07:23:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:23:35,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:23:35,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:23:35,363 INFO L225 Difference]: With dead ends: 24 [2021-10-13 07:23:35,363 INFO L226 Difference]: Without dead ends: 24 [2021-10-13 07:23:35,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:23:35,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-13 07:23:35,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2021-10-13 07:23:35,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:23:35,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-10-13 07:23:35,379 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 6 [2021-10-13 07:23:35,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:23:35,379 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-10-13 07:23:35,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:23:35,380 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-10-13 07:23:35,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:23:35,380 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:23:35,381 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:23:35,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:23:35,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:23:35,605 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:23:35,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:23:35,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1707409478, now seen corresponding path program 1 times [2021-10-13 07:23:35,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:23:35,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865084374] [2021-10-13 07:23:35,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:23:35,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:23:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:23:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:35,684 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:23:35,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865084374] [2021-10-13 07:23:35,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865084374] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:23:35,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675306350] [2021-10-13 07:23:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:23:35,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:23:35,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:23:35,688 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:23:35,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 07:23:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:23:35,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:23:35,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:23:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:35,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:23:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:35,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675306350] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:23:35,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1782383157] [2021-10-13 07:23:35,875 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-13 07:23:35,875 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:23:35,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:23:35,889 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:23:35,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:23:35,932 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:35,937 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:23:35,938 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:35,939 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-10-13 07:23:35,943 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:23:35,948 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:35,949 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-13 07:23:35,950 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:23:35,950 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:35,952 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-10-13 07:23:35,956 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-10-13 07:23:36,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:23:36,004 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:36,005 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-13 07:23:36,012 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:36,013 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-13 07:23:36,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:23:36,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:23:36,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:36,047 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:36,050 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-10-13 07:23:36,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:23:36,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-10-13 07:23:36,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:23:36,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:23:36,270 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_50| 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 07:23:36,273 INFO L168 Benchmark]: Toolchain (without parser) took 2978.57 ms. Allocated memory was 86.0 MB in the beginning and 113.2 MB in the end (delta: 27.3 MB). Free memory was 53.8 MB in the beginning and 68.9 MB in the end (delta: -15.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:23:36,273 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 86.0 MB. Free memory is still 42.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:23:36,274 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.32 ms. Allocated memory is still 86.0 MB. Free memory was 53.5 MB in the beginning and 63.1 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:23:36,274 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.58 ms. Allocated memory is still 86.0 MB. Free memory was 63.1 MB in the beginning and 61.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:23:36,275 INFO L168 Benchmark]: Boogie Preprocessor took 52.68 ms. Allocated memory is still 86.0 MB. Free memory was 61.4 MB in the beginning and 60.5 MB in the end (delta: 996.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:23:36,275 INFO L168 Benchmark]: RCFGBuilder took 566.18 ms. Allocated memory is still 86.0 MB. Free memory was 60.2 MB in the beginning and 47.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:23:36,276 INFO L168 Benchmark]: TraceAbstraction took 1968.03 ms. Allocated memory was 86.0 MB in the beginning and 113.2 MB in the end (delta: 27.3 MB). Free memory was 47.0 MB in the beginning and 68.9 MB in the end (delta: -21.9 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:23:36,283 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 86.0 MB. Free memory is still 42.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 338.32 ms. Allocated memory is still 86.0 MB. Free memory was 53.5 MB in the beginning and 63.1 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.58 ms. Allocated memory is still 86.0 MB. Free memory was 63.1 MB in the beginning and 61.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.68 ms. Allocated memory is still 86.0 MB. Free memory was 61.4 MB in the beginning and 60.5 MB in the end (delta: 996.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 566.18 ms. Allocated memory is still 86.0 MB. Free memory was 60.2 MB in the beginning and 47.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1968.03 ms. Allocated memory was 86.0 MB in the beginning and 113.2 MB in the end (delta: 27.3 MB). Free memory was 47.0 MB in the beginning and 68.9 MB in the end (delta: -21.9 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_50| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_50|: 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 07:23:36,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:23:38,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:23:38,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:23:38,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:23:38,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:23:38,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:23:38,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:23:38,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:23:38,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:23:38,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:23:38,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:23:38,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:23:38,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:23:38,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:23:38,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:23:38,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:23:38,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:23:38,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:23:38,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:23:39,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:23:39,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:23:39,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:23:39,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:23:39,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:23:39,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:23:39,019 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:23:39,019 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:23:39,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:23:39,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:23:39,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:23:39,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:23:39,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:23:39,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:23:39,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:23:39,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:23:39,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:23:39,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:23:39,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:23:39,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:23:39,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:23:39,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:23:39,042 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-13 07:23:39,085 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:23:39,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:23:39,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:23:39,087 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:23:39,087 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:23:39,088 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:23:39,088 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:23:39,088 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:23:39,088 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:23:39,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:23:39,091 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:23:39,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:23:39,092 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:23:39,092 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:23:39,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:23:39,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:23:39,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:23:39,094 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:23:39,094 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:23:39,094 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:23:39,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:23:39,095 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:23:39,095 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:23:39,095 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:23:39,096 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:23:39,096 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:23:39,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:23:39,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:23:39,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:23:39,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:23:39,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:23:39,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:23:39,098 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:23:39,099 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:23:39,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:23:39,099 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:23:39,100 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_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e872a0dffbf376eb2d8b1e3516401a8dafe115a6 [2021-10-13 07:23:39,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:23:39,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:23:39,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:23:39,530 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:23:39,531 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:23:39,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2021-10-13 07:23:39,617 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/data/93f8ed6a2/8fcc7ef2c3554fd99fad13e2ec425bab/FLAG0e3051235 [2021-10-13 07:23:40,190 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:23:40,191 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2021-10-13 07:23:40,198 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/data/93f8ed6a2/8fcc7ef2c3554fd99fad13e2ec425bab/FLAG0e3051235 [2021-10-13 07:23:40,565 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/data/93f8ed6a2/8fcc7ef2c3554fd99fad13e2ec425bab [2021-10-13 07:23:40,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:23:40,570 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:23:40,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:23:40,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:23:40,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:23:40,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:23:40" (1/1) ... [2021-10-13 07:23:40,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@497425e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:40, skipping insertion in model container [2021-10-13 07:23:40,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:23:40" (1/1) ... [2021-10-13 07:23:40,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:23:40,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:23:40,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:23:40,823 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:23:40,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:23:40,865 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:23:40,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:40 WrapperNode [2021-10-13 07:23:40,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:23:40,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:23:40,869 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:23:40,869 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:23:40,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:40" (1/1) ... [2021-10-13 07:23:40,888 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:40" (1/1) ... [2021-10-13 07:23:40,919 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:23:40,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:23:40,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:23:40,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:23:40,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:40" (1/1) ... [2021-10-13 07:23:40,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:40" (1/1) ... [2021-10-13 07:23:40,958 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:40" (1/1) ... [2021-10-13 07:23:40,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:40" (1/1) ... [2021-10-13 07:23:40,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:40" (1/1) ... [2021-10-13 07:23:40,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:40" (1/1) ... [2021-10-13 07:23:40,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:40" (1/1) ... [2021-10-13 07:23:40,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:23:40,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:23:40,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:23:40,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:23:40,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:40" (1/1) ... [2021-10-13 07:23:40,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:23:40,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:23:41,005 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:23:41,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:23:41,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:23:41,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:23:41,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:23:41,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:23:41,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:23:41,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:23:41,429 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:23:41,429 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-13 07:23:41,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:23:41 BoogieIcfgContainer [2021-10-13 07:23:41,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:23:41,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:23:41,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:23:41,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:23:41,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:23:40" (1/3) ... [2021-10-13 07:23:41,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6da276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:23:41, skipping insertion in model container [2021-10-13 07:23:41,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:40" (2/3) ... [2021-10-13 07:23:41,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6da276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:23:41, skipping insertion in model container [2021-10-13 07:23:41,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:23:41" (3/3) ... [2021-10-13 07:23:41,454 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers2.c [2021-10-13 07:23:41,460 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:23:41,460 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-10-13 07:23:41,549 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:23:41,555 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:23:41,556 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-10-13 07:23:41,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:23:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:23:41,592 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:23:41,592 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:23:41,593 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:23:41,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:23:41,598 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-10-13 07:23:41,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:23:41,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268314729] [2021-10-13 07:23:41,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:23:41,633 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:23:41,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:23:41,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:23:41,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:23:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:23:41,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:23:41,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:23:41,799 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:23:41,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:23:41,935 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 07:23:41,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:23:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:41,983 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:23:41,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268314729] [2021-10-13 07:23:41,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268314729] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:23:41,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:23:41,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 07:23:41,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615200650] [2021-10-13 07:23:41,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:23:41,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:23:42,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:23:42,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:23:42,018 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:23:42,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:23:42,100 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-10-13 07:23:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:23:42,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 07:23:42,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:23:42,111 INFO L225 Difference]: With dead ends: 27 [2021-10-13 07:23:42,111 INFO L226 Difference]: Without dead ends: 25 [2021-10-13 07:23:42,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:23:42,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-13 07:23:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-13 07:23:42,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:23:42,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-10-13 07:23:42,142 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 4 [2021-10-13 07:23:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:23:42,143 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-10-13 07:23:42,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:23:42,143 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-10-13 07:23:42,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:23:42,144 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:23:42,144 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:23:42,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-13 07:23:42,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:23:42,345 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:23:42,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:23:42,346 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-10-13 07:23:42,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:23:42,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340529354] [2021-10-13 07:23:42,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:23:42,347 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:23:42,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:23:42,348 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:23:42,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:23:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:23:42,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:23:42,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:23:42,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:23:42,538 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 07:23:42,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:23:42,796 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 07:23:42,796 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:23:42,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340529354] [2021-10-13 07:23:42,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340529354] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:23:42,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:23:42,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 07:23:42,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746277487] [2021-10-13 07:23:42,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:23:42,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:23:42,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:23:42,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:23:42,801 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:23:43,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:23:43,103 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-10-13 07:23:43,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:23:43,104 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 07:23:43,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:23:43,105 INFO L225 Difference]: With dead ends: 49 [2021-10-13 07:23:43,106 INFO L226 Difference]: Without dead ends: 49 [2021-10-13 07:23:43,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:23:43,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-13 07:23:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2021-10-13 07:23:43,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 29 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 07:23:43,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-10-13 07:23:43,113 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2021-10-13 07:23:43,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:23:43,113 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-10-13 07:23:43,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:23:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-10-13 07:23:43,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:23:43,115 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:23:43,115 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:23:43,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:23:43,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:23:43,316 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:23:43,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:23:43,317 INFO L82 PathProgramCache]: Analyzing trace with hash 741359650, now seen corresponding path program 1 times [2021-10-13 07:23:43,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:23:43,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497594775] [2021-10-13 07:23:43,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:23:43,318 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:23:43,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:23:43,319 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:23:43,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:23:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:23:43,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:23:43,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:23:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:43,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:23:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:43,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:23:43,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497594775] [2021-10-13 07:23:43,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497594775] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:23:43,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1691084666] [2021-10-13 07:23:43,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:23:43,464 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:23:43,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:23:43,477 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:23:43,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 07:23:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:23:43,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:23:43,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:23:43,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:43,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:23:43,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:43,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1691084666] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:23:43,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139552711] [2021-10-13 07:23:43,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:23:43,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:23:43,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:23:43,767 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:23:43,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 07:23:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:23:43,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:23:43,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:23:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:43,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:23:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:43,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139552711] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:23:43,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:23:43,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-10-13 07:23:43,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424192663] [2021-10-13 07:23:43,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:23:43,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:23:43,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:23:43,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:23:43,915 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 07:23:43,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:23:43,993 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-10-13 07:23:43,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:23:43,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 10 [2021-10-13 07:23:43,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:23:43,995 INFO L225 Difference]: With dead ends: 36 [2021-10-13 07:23:43,995 INFO L226 Difference]: Without dead ends: 36 [2021-10-13 07:23:43,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:23:43,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-13 07:23:43,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-10-13 07:23:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 34 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 07:23:44,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-10-13 07:23:44,001 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 10 [2021-10-13 07:23:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:23:44,002 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-10-13 07:23:44,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 07:23:44,002 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-10-13 07:23:44,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:23:44,003 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:23:44,003 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2021-10-13 07:23:44,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-10-13 07:23:44,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:23:44,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:23:44,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:23:44,605 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:23:44,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:23:44,606 INFO L82 PathProgramCache]: Analyzing trace with hash 742961990, now seen corresponding path program 1 times [2021-10-13 07:23:44,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:23:44,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808472285] [2021-10-13 07:23:44,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:23:44,607 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:23:44,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:23:44,608 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:23:44,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:23:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:23:44,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:23:44,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:23:44,701 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 07:23:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:44,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:23:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:45,586 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:23:45,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808472285] [2021-10-13 07:23:45,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808472285] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:23:45,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1433965946] [2021-10-13 07:23:45,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:23:45,587 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:23:45,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:23:45,589 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:23:45,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 07:23:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:23:45,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:23:45,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:23:45,732 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 07:23:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:45,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:23:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:46,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1433965946] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:23:46,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284551353] [2021-10-13 07:23:46,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:23:46,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:23:46,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:23:46,119 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:23:46,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 07:23:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:23:46,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:23:46,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:23:46,231 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 07:23:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:46,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:23:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:46,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284551353] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:23:46,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:23:46,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2021-10-13 07:23:46,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622836236] [2021-10-13 07:23:46,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:23:46,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:23:46,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:23:46,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:23:46,662 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:23:47,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:23:47,312 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2021-10-13 07:23:47,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:23:47,313 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 10 [2021-10-13 07:23:47,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:23:47,314 INFO L225 Difference]: With dead ends: 80 [2021-10-13 07:23:47,314 INFO L226 Difference]: Without dead ends: 80 [2021-10-13 07:23:47,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 697.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:23:47,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-13 07:23:47,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 42. [2021-10-13 07:23:47,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 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 07:23:47,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-10-13 07:23:47,320 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 10 [2021-10-13 07:23:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:23:47,321 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-10-13 07:23:47,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 07:23:47,321 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-10-13 07:23:47,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 07:23:47,322 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:23:47,322 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:23:47,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-13 07:23:47,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:23:47,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:23:47,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:23:47,934 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:23:47,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:23:47,934 INFO L82 PathProgramCache]: Analyzing trace with hash -2129139286, now seen corresponding path program 2 times [2021-10-13 07:23:47,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:23:47,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410091283] [2021-10-13 07:23:47,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:23:47,935 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:23:47,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:23:47,936 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:23:47,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:23:48,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 07:23:48,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:23:48,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:23:48,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:23:48,073 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:23:48,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:23:48,083 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 07:23:48,580 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:23:48,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-10-13 07:23:48,606 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-13 07:23:48,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 46 [2021-10-13 07:23:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-13 07:23:48,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:23:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-13 07:23:54,138 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:23:54,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410091283] [2021-10-13 07:23:54,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410091283] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:23:54,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:23:54,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 07:23:54,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248683584] [2021-10-13 07:23:54,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:23:54,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:23:54,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:23:54,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=38, Unknown=2, NotChecked=0, Total=56 [2021-10-13 07:23:54,140 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:01,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:01,361 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2021-10-13 07:24:01,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:24:01,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 07:24:01,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:01,365 INFO L225 Difference]: With dead ends: 61 [2021-10-13 07:24:01,365 INFO L226 Difference]: Without dead ends: 61 [2021-10-13 07:24:01,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 6311.5ms TimeCoverageRelationStatistics Valid=55, Invalid=99, Unknown=2, NotChecked=0, Total=156 [2021-10-13 07:24:01,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-13 07:24:01,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2021-10-13 07:24:01,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 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 07:24:01,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-10-13 07:24:01,372 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 19 [2021-10-13 07:24:01,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:01,372 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-10-13 07:24:01,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:01,373 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-10-13 07:24:01,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 07:24:01,373 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:01,373 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:01,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:01,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:24:01,574 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:24:01,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:01,575 INFO L82 PathProgramCache]: Analyzing trace with hash -2129139287, now seen corresponding path program 1 times [2021-10-13 07:24:01,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:24:01,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284257552] [2021-10-13 07:24:01,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:01,576 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:24:01,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:24:01,577 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:24:01,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 07:24:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:01,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:24:01,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:01,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:02,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:24:02,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284257552] [2021-10-13 07:24:02,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284257552] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:24:02,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1322065414] [2021-10-13 07:24:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:02,083 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:24:02,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:24:02,092 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:24:02,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-13 07:24:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:02,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:24:02,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:02,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:02,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1322065414] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:24:02,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044442316] [2021-10-13 07:24:02,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:02,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:24:02,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:24:02,583 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:24:02,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 07:24:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:02,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:24:02,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:02,811 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:24:02,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:24:03,341 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-10-13 07:24:03,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 54 [2021-10-13 07:24:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-13 07:24:03,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-13 07:24:07,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044442316] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:07,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:24:07,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7, 7, 7] total 18 [2021-10-13 07:24:07,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414979] [2021-10-13 07:24:07,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:24:07,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:24:07,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:24:07,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=244, Unknown=1, NotChecked=0, Total=306 [2021-10-13 07:24:07,408 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:07,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:07,701 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-10-13 07:24:07,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:24:07,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 07:24:07,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:07,705 INFO L225 Difference]: With dead ends: 48 [2021-10-13 07:24:07,705 INFO L226 Difference]: Without dead ends: 48 [2021-10-13 07:24:07,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 3724.0ms TimeCoverageRelationStatistics Valid=76, Invalid=303, Unknown=1, NotChecked=0, Total=380 [2021-10-13 07:24:07,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-13 07:24:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-13 07:24:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 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 07:24:07,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-10-13 07:24:07,712 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 19 [2021-10-13 07:24:07,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:07,713 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-10-13 07:24:07,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:07,713 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-10-13 07:24:07,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 07:24:07,714 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:07,714 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:07,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:07,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-10-13 07:24:08,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:08,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:24:08,315 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:24:08,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:08,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1578808454, now seen corresponding path program 1 times [2021-10-13 07:24:08,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:24:08,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421626598] [2021-10-13 07:24:08,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:08,316 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:24:08,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:24:08,321 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:24:08,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 07:24:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:08,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:24:08,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:08,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:09,002 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:24:09,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421626598] [2021-10-13 07:24:09,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421626598] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:24:09,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [251728562] [2021-10-13 07:24:09,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:09,003 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:24:09,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:24:09,009 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:24:09,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-13 07:24:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:09,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:24:09,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:09,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:09,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [251728562] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:24:09,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390271211] [2021-10-13 07:24:09,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:09,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:24:09,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:24:09,615 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:24:09,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 07:24:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:09,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:24:09,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:09,932 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 07:24:09,977 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-13 07:24:09,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-13 07:24:10,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390271211] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:10,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:24:10,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [7, 7, 7, 7] total 13 [2021-10-13 07:24:10,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780778787] [2021-10-13 07:24:10,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:24:10,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:24:10,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:24:10,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:24:10,044 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 07:24:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:10,105 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-10-13 07:24:10,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:24:10,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-13 07:24:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:10,106 INFO L225 Difference]: With dead ends: 47 [2021-10-13 07:24:10,106 INFO L226 Difference]: Without dead ends: 47 [2021-10-13 07:24:10,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 259.1ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:24:10,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-13 07:24:10,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-10-13 07:24:10,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:10,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-10-13 07:24:10,111 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 20 [2021-10-13 07:24:10,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:10,111 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-10-13 07:24:10,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 07:24:10,112 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-10-13 07:24:10,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 07:24:10,112 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:10,112 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:10,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:10,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-13 07:24:10,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-10-13 07:24:10,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:24:10,722 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:24:10,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:10,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1578808453, now seen corresponding path program 1 times [2021-10-13 07:24:10,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:24:10,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039704667] [2021-10-13 07:24:10,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:10,723 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:24:10,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:24:10,724 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:24:10,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 07:24:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:10,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:24:10,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:11,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:11,338 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:24:11,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039704667] [2021-10-13 07:24:11,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039704667] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:24:11,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [981267146] [2021-10-13 07:24:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:11,339 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:24:11,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:24:11,342 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:24:11,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-13 07:24:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:11,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:24:11,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:11,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:11,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [981267146] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:24:11,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097806880] [2021-10-13 07:24:11,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:11,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:24:11,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:24:11,930 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:24:11,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 07:24:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:12,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:24:12,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:12,269 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 07:24:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-13 07:24:12,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:12,659 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-13 07:24:12,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097806880] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:12,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:24:12,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [7, 7, 7, 7] total 14 [2021-10-13 07:24:12,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774127517] [2021-10-13 07:24:12,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:24:12,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:24:12,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:24:12,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:24:12,662 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:12,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:12,888 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-10-13 07:24:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:24:12,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-13 07:24:12,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:12,889 INFO L225 Difference]: With dead ends: 49 [2021-10-13 07:24:12,890 INFO L226 Difference]: Without dead ends: 49 [2021-10-13 07:24:12,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 420.9ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:24:12,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-13 07:24:12,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-10-13 07:24:12,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-10-13 07:24:12,895 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 20 [2021-10-13 07:24:12,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:12,896 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-10-13 07:24:12,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:12,896 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-10-13 07:24:12,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 07:24:12,897 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:12,898 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1] [2021-10-13 07:24:12,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:13,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-13 07:24:13,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:13,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:24:13,500 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:24:13,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:13,501 INFO L82 PathProgramCache]: Analyzing trace with hash -620816058, now seen corresponding path program 2 times [2021-10-13 07:24:13,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:24:13,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769954515] [2021-10-13 07:24:13,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:24:13,517 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:24:13,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:24:13,519 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:24:13,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 07:24:13,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:24:13,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:24:13,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:24:13,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:13,802 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 07:24:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:14,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:16,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:24:16,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769954515] [2021-10-13 07:24:16,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769954515] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:24:16,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [210977402] [2021-10-13 07:24:16,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:24:16,456 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:24:16,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:24:16,456 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:24:16,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-10-13 07:24:16,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:24:16,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:24:16,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:24:16,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:16,836 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 07:24:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:17,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:19,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [210977402] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:24:19,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983387039] [2021-10-13 07:24:19,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:24:19,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:24:19,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:24:19,827 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:24:19,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 07:24:20,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:24:20,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:24:20,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:24:20,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:20,190 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 07:24:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:20,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:23,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983387039] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:24:23,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:24:23,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 8, 8, 9] total 29 [2021-10-13 07:24:23,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659558894] [2021-10-13 07:24:23,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 07:24:23,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:24:23,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 07:24:23,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2021-10-13 07:24:23,687 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 31 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 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 07:24:33,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:33,893 INFO L93 Difference]: Finished difference Result 247 states and 263 transitions. [2021-10-13 07:24:33,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 07:24:33,896 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 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) Word has length 22 [2021-10-13 07:24:33,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:33,898 INFO L225 Difference]: With dead ends: 247 [2021-10-13 07:24:33,899 INFO L226 Difference]: Without dead ends: 247 [2021-10-13 07:24:33,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 13185.0ms TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2021-10-13 07:24:33,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-10-13 07:24:33,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 72. [2021-10-13 07:24:33,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 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 07:24:33,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2021-10-13 07:24:33,911 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 22 [2021-10-13 07:24:33,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:33,911 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2021-10-13 07:24:33,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 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 07:24:33,912 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2021-10-13 07:24:33,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 07:24:33,913 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:33,914 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:33,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:34,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:34,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:34,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:24:34,517 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:24:34,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:34,518 INFO L82 PathProgramCache]: Analyzing trace with hash 983139060, now seen corresponding path program 1 times [2021-10-13 07:24:34,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:24:34,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331910762] [2021-10-13 07:24:34,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:34,518 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:24:34,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:24:34,519 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:24:34,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 07:24:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:34,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:24:34,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:24:35,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:24:35,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:24:35,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331910762] [2021-10-13 07:24:35,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331910762] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:24:35,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1357194647] [2021-10-13 07:24:35,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:35,570 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:24:35,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:24:35,581 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:24:35,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-10-13 07:24:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:36,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:24:36,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:24:36,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:24:36,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1357194647] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:24:36,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669098751] [2021-10-13 07:24:36,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:36,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:24:36,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:24:36,456 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:24:36,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 07:24:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:36,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:24:36,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-13 07:24:37,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-13 07:24:37,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669098751] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:24:37,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:24:37,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 4, 4] total 22 [2021-10-13 07:24:37,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332850455] [2021-10-13 07:24:37,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 07:24:37,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:24:37,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 07:24:37,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-10-13 07:24:37,304 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 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 07:24:38,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:38,093 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2021-10-13 07:24:38,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 07:24:38,093 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-13 07:24:38,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:38,095 INFO L225 Difference]: With dead ends: 82 [2021-10-13 07:24:38,096 INFO L226 Difference]: Without dead ends: 82 [2021-10-13 07:24:38,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 709.2ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-10-13 07:24:38,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-13 07:24:38,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-10-13 07:24:38,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 79 states have internal predecessors, (87), 0 states have call successors, (0), 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 07:24:38,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-10-13 07:24:38,102 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 35 [2021-10-13 07:24:38,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:38,103 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-10-13 07:24:38,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 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 07:24:38,103 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-10-13 07:24:38,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-13 07:24:38,105 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:38,105 INFO L512 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1] [2021-10-13 07:24:38,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:38,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:38,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-13 07:24:38,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:24:38,719 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:24:38,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:38,720 INFO L82 PathProgramCache]: Analyzing trace with hash 145810758, now seen corresponding path program 3 times [2021-10-13 07:24:38,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:24:38,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410882819] [2021-10-13 07:24:38,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:24:38,720 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:24:38,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:24:38,721 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:24:38,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 07:24:39,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-13 07:24:39,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:24:39,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:24:39,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 134 proven. 145 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-13 07:24:39,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 134 proven. 145 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-13 07:24:40,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:24:40,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410882819] [2021-10-13 07:24:40,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410882819] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:24:40,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1470161574] [2021-10-13 07:24:40,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:24:40,315 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:24:40,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:24:40,326 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:24:40,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-10-13 07:24:41,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-13 07:24:41,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:24:41,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-13 07:24:41,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:41,212 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 07:24:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 128 proven. 155 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-13 07:24:42,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:04,048 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:04,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1470161574] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:04,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087107390] [2021-10-13 07:25:04,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:25:04,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:25:04,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:25:04,059 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:25:04,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-13 07:25:06,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-13 07:25:06,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:25:06,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:25:06,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:06,800 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 07:25:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 76 proven. 222 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:25:07,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:28,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087107390] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:28,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:25:28,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 25, 15, 17] total 78 [2021-10-13 07:25:28,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139736404] [2021-10-13 07:25:28,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-10-13 07:25:28,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:28,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-10-13 07:25:28,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1042, Invalid=4964, Unknown=0, NotChecked=0, Total=6006 [2021-10-13 07:25:28,030 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 78 states, 78 states have (on average 2.5641025641025643) internal successors, (200), 78 states have internal predecessors, (200), 0 states have call successors, (0), 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 07:25:29,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:29,437 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-10-13 07:25:29,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 07:25:29,442 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.5641025641025643) internal successors, (200), 78 states have internal predecessors, (200), 0 states have call successors, (0), 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 07:25:29,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:29,444 INFO L225 Difference]: With dead ends: 66 [2021-10-13 07:25:29,444 INFO L226 Difference]: Without dead ends: 66 [2021-10-13 07:25:29,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 33294.2ms TimeCoverageRelationStatistics Valid=1042, Invalid=4964, Unknown=0, NotChecked=0, Total=6006 [2021-10-13 07:25:29,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-13 07:25:29,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-10-13 07:25:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 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 07:25:29,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-10-13 07:25:29,471 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 46 [2021-10-13 07:25:29,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:29,472 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-10-13 07:25:29,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.5641025641025643) internal successors, (200), 78 states have internal predecessors, (200), 0 states have call successors, (0), 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 07:25:29,477 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-10-13 07:25:29,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 07:25:29,479 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:29,479 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:29,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:29,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:29,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:30,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:25:30,084 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:25:30,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:30,085 INFO L82 PathProgramCache]: Analyzing trace with hash -676132566, now seen corresponding path program 1 times [2021-10-13 07:25:30,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:30,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956201504] [2021-10-13 07:25:30,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:30,086 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:30,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:30,087 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:30,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-13 07:25:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:30,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:25:30,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:30,900 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:25:30,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:25:30,925 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 07:25:32,099 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:25:32,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-10-13 07:25:32,152 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-13 07:25:32,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 45 [2021-10-13 07:25:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:25:32,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:25:39,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:39,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956201504] [2021-10-13 07:25:39,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956201504] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:39,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1299448903] [2021-10-13 07:25:39,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:39,598 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:25:39,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:25:39,598 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:25:39,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-10-13 07:25:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:40,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:25:40,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:40,746 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:25:40,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:25:40,766 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 07:25:41,794 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:25:41,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-10-13 07:25:41,832 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-13 07:25:41,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 44 [2021-10-13 07:25:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:25:42,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:25:45,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1299448903] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:45,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003369668] [2021-10-13 07:25:45,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:45,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:25:45,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:25:45,058 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:25:45,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-13 07:25:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:46,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:25:46,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:46,075 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:25:46,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:25:46,099 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 07:25:47,130 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:25:47,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-10-13 07:25:47,167 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-13 07:25:47,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 45 [2021-10-13 07:25:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:25:47,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:25:52,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003369668] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:52,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:25:52,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2021-10-13 07:25:52,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652820319] [2021-10-13 07:25:52,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 07:25:52,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:52,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 07:25:52,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=99, Unknown=1, NotChecked=0, Total=132 [2021-10-13 07:25:52,589 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:12,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:12,940 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2021-10-13 07:26:12,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 07:26:12,956 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-10-13 07:26:12,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:12,956 INFO L225 Difference]: With dead ends: 94 [2021-10-13 07:26:12,956 INFO L226 Difference]: Without dead ends: 94 [2021-10-13 07:26:12,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 264 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 18455.2ms TimeCoverageRelationStatistics Valid=146, Invalid=315, Unknown=1, NotChecked=0, Total=462 [2021-10-13 07:26:12,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-13 07:26:12,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2021-10-13 07:26:12,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 76 states have internal predecessors, (82), 0 states have call successors, (0), 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 07:26:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2021-10-13 07:26:12,960 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 47 [2021-10-13 07:26:12,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:12,961 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2021-10-13 07:26:12,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:12,961 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2021-10-13 07:26:12,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-13 07:26:12,962 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:12,962 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:12,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-10-13 07:26:13,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:13,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:13,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:13,563 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:26:13,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:13,568 INFO L82 PathProgramCache]: Analyzing trace with hash 514726907, now seen corresponding path program 1 times [2021-10-13 07:26:13,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:13,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646730533] [2021-10-13 07:26:13,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:13,569 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:13,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:13,570 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:13,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-13 07:26:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:14,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:26:14,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:14,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:26:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:14,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:15,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:15,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646730533] [2021-10-13 07:26:15,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646730533] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:15,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1494931379] [2021-10-13 07:26:15,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:15,643 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:15,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:26:15,644 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:26:15,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-10-13 07:26:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:16,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:26:16,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:16,920 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 07:26:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:17,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:17,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1494931379] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:17,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464930400] [2021-10-13 07:26:17,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:17,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:17,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:17,495 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:26:17,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-13 07:26:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:18,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:26:18,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:18,624 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 07:26:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:18,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:19,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464930400] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:19,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:26:19,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-10-13 07:26:19,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913395102] [2021-10-13 07:26:19,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:26:19,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:19,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:26:19,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:26:19,282 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 8 states, 7 states have (on average 5.0) 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 07:26:20,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:20,420 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2021-10-13 07:26:20,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:26:20,421 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) 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 48 [2021-10-13 07:26:20,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:20,422 INFO L225 Difference]: With dead ends: 80 [2021-10-13 07:26:20,422 INFO L226 Difference]: Without dead ends: 80 [2021-10-13 07:26:20,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1077.8ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:26:20,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-13 07:26:20,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2021-10-13 07:26:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.095890410958904) internal successors, (80), 77 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 07:26:20,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-10-13 07:26:20,426 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 48 [2021-10-13 07:26:20,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:20,426 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-10-13 07:26:20,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) 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 07:26:20,426 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-10-13 07:26:20,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-13 07:26:20,428 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:20,428 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:20,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:20,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:20,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:21,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:21,038 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:26:21,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:21,038 INFO L82 PathProgramCache]: Analyzing trace with hash -46063240, now seen corresponding path program 2 times [2021-10-13 07:26:21,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:21,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230585435] [2021-10-13 07:26:21,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:26:21,039 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:21,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:21,040 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:21,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-13 07:26:21,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:26:21,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:26:21,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:26:21,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:22,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:22,508 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:22,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230585435] [2021-10-13 07:26:22,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230585435] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:22,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [865054494] [2021-10-13 07:26:22,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:26:22,508 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:22,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:26:22,509 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:26:22,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-10-13 07:26:23,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:26:23,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:26:23,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:26:23,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:24,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:24,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [865054494] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:24,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509820165] [2021-10-13 07:26:24,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:26:24,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:24,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:24,236 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:26:24,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-13 07:26:25,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:26:25,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:26:25,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:26:25,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:25,487 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 07:26:25,782 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 15 treesize of output 11 [2021-10-13 07:26:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:25,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:26,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509820165] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:26,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:26:26,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 9] total 20 [2021-10-13 07:26:26,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912659431] [2021-10-13 07:26:26,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 07:26:26,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:26,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 07:26:26,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-10-13 07:26:26,700 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 20 states, 20 states have (on average 4.25) internal successors, (85), 20 states have internal predecessors, (85), 0 states have call successors, (0), 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 07:26:27,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:27,991 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-10-13 07:26:27,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 07:26:27,993 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.25) internal successors, (85), 20 states have internal predecessors, (85), 0 states have call successors, (0), 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 59 [2021-10-13 07:26:27,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:27,994 INFO L225 Difference]: With dead ends: 102 [2021-10-13 07:26:27,994 INFO L226 Difference]: Without dead ends: 102 [2021-10-13 07:26:27,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1238.0ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-10-13 07:26:27,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-13 07:26:27,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-10-13 07:26:27,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.120879120879121) internal successors, (102), 95 states have internal predecessors, (102), 0 states have call successors, (0), 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 07:26:27,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2021-10-13 07:26:27,999 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 59 [2021-10-13 07:26:27,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:27,999 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2021-10-13 07:26:28,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.25) internal successors, (85), 20 states have internal predecessors, (85), 0 states have call successors, (0), 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 07:26:28,000 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2021-10-13 07:26:28,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-13 07:26:28,002 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:28,002 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:28,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:28,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:28,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-10-13 07:26:28,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:28,621 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:26:28,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:28,621 INFO L82 PathProgramCache]: Analyzing trace with hash -401630678, now seen corresponding path program 2 times [2021-10-13 07:26:28,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:28,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963807954] [2021-10-13 07:26:28,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:26:28,622 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:28,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:28,624 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:28,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-13 07:26:29,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:26:29,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:26:29,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 07:26:29,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:29,834 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:26:29,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:26:29,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:26:30,999 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:26:31,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2021-10-13 07:26:31,042 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-13 07:26:31,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 48 [2021-10-13 07:26:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:32,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:40,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:40,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963807954] [2021-10-13 07:26:40,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963807954] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:40,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1998760052] [2021-10-13 07:26:40,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:26:40,908 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:40,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:26:40,909 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:26:40,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-10-13 07:26:42,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:26:42,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:26:42,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 07:26:42,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:42,574 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:26:42,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:26:42,590 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 07:26:43,538 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:26:43,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-10-13 07:26:43,576 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-13 07:26:43,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 46 [2021-10-13 07:26:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:44,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:53,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1998760052] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:53,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939048100] [2021-10-13 07:26:53,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:26:53,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:53,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:53,299 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:26:53,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-13 07:26:55,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:26:55,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:26:55,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 07:26:55,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:55,059 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 07:26:55,095 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:26:55,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:26:56,236 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-13 07:26:56,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 36 [2021-10-13 07:26:56,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-10-13 07:26:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:58,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:27:06,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939048100] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:06,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:27:06,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9, 9, 10, 10] total 35 [2021-10-13 07:27:06,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885027030] [2021-10-13 07:27:06,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-13 07:27:06,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:27:06,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-13 07:27:06,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1028, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 07:27:06,864 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 37 states, 36 states have (on average 4.444444444444445) internal successors, (160), 36 states have internal predecessors, (160), 0 states have call successors, (0), 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 07:27:50,849 WARN L207 SmtUtils]: Spent 7.82 s on a formula simplification that was a NOOP. DAG size: 67 [2021-10-13 07:27:55,074 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (bvmul c_ULTIMATE.start_getNumbers2_~i~1 (_ bv4 32)))) (let ((.cse2 (select |c_#length| c_ULTIMATE.start_getNumbers2_~numbers~0.base)) (.cse1 (bvadd (_ bv4 32) .cse3 c_ULTIMATE.start_getNumbers2_~numbers~0.offset))) (and (forall ((|v_ULTIMATE.start_getNumbers2_~#numbers2~0.base_66| (_ BitVec 32))) (or (let ((.cse0 (bvadd |c_~#array~0.offset| (_ bv28 32)))) (and (bvule (bvadd |c_~#array~0.offset| (_ bv24 32)) .cse0) (bvule .cse0 (select (store |c_#length| |v_ULTIMATE.start_getNumbers2_~#numbers2~0.base_66| (_ bv40 32)) |c_~#array~0.base|)))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_getNumbers2_~#numbers2~0.base_66|))))) (or (and (bvule .cse1 .cse2) (bvule (bvadd .cse3 c_ULTIMATE.start_getNumbers2_~numbers~0.offset) .cse1)) (not (bvslt c_ULTIMATE.start_getNumbers2_~i~1 (_ bv10 32)))) (forall ((|v_ULTIMATE.start_getNumbers2_~#numbers2~0.base_66| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_getNumbers2_~#numbers2~0.base_66|))) (let ((.cse4 (bvadd |c_ULTIMATE.start_getNumbers_#res.offset| (_ bv28 32)))) (and (bvule .cse4 (select (store |c_#length| |v_ULTIMATE.start_getNumbers2_~#numbers2~0.base_66| (_ bv40 32)) |c_ULTIMATE.start_getNumbers_#res.base|)) (bvule (bvadd |c_ULTIMATE.start_getNumbers_#res.offset| (_ bv24 32)) .cse4))))) (or (not (bvslt (bvadd c_ULTIMATE.start_getNumbers2_~i~1 (_ bv1 32)) (_ bv10 32))) (let ((.cse5 (bvadd (_ bv8 32) .cse3 c_ULTIMATE.start_getNumbers2_~numbers~0.offset))) (and (bvule .cse5 .cse2) (bvule .cse1 .cse5))))))) is different from false [2021-10-13 07:28:17,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:28:17,783 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2021-10-13 07:28:17,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 07:28:17,784 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.444444444444445) internal successors, (160), 36 states have internal predecessors, (160), 0 states have call successors, (0), 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 67 [2021-10-13 07:28:17,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:28:17,786 INFO L225 Difference]: With dead ends: 148 [2021-10-13 07:28:17,786 INFO L226 Difference]: Without dead ends: 148 [2021-10-13 07:28:17,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 359 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 72204.3ms TimeCoverageRelationStatistics Valid=813, Invalid=2610, Unknown=3, NotChecked=114, Total=3540 [2021-10-13 07:28:17,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-13 07:28:17,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 117. [2021-10-13 07:28:17,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.1428571428571428) internal successors, (128), 116 states have internal predecessors, (128), 0 states have call successors, (0), 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 07:28:17,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 128 transitions. [2021-10-13 07:28:17,792 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 128 transitions. Word has length 67 [2021-10-13 07:28:17,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:28:17,793 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 128 transitions. [2021-10-13 07:28:17,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.444444444444445) internal successors, (160), 36 states have internal predecessors, (160), 0 states have call successors, (0), 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 07:28:17,794 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 128 transitions. [2021-10-13 07:28:17,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-13 07:28:17,795 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:28:17,796 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-10-13 07:28:17,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-13 07:28:18,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-13 07:28:18,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-10-13 07:28:18,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:28:18,410 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:28:18,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:28:18,410 INFO L82 PathProgramCache]: Analyzing trace with hash 434350843, now seen corresponding path program 2 times [2021-10-13 07:28:18,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:28:18,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573206051] [2021-10-13 07:28:18,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:28:18,411 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:28:18,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:28:18,412 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:28:18,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-13 07:28:19,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 07:28:19,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:28:19,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:28:19,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:28:20,026 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:28:20,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:28:20,047 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 07:28:21,176 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:28:21,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-13 07:28:21,241 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-13 07:28:21,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 35 [2021-10-13 07:28:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-10-13 07:28:22,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:28:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-10-13 07:28:54,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:28:54,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573206051] [2021-10-13 07:28:54,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573206051] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:28:54,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [715207380] [2021-10-13 07:28:54,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:28:54,095 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:28:54,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:28:54,096 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:28:54,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-10-13 07:28:56,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 07:28:56,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:28:56,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:28:56,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:28:56,634 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:28:56,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:28:56,651 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 07:28:57,740 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-13 07:28:57,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 38 [2021-10-13 07:28:57,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-10-13 07:28:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-10-13 07:28:58,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-10-13 07:29:28,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [715207380] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:29:28,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029251273] [2021-10-13 07:29:28,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:29:28,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:29:28,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:29:28,218 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:29:28,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-13 07:29:30,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 07:29:30,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:29:30,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:29:30,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:30,653 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:29:30,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:29:30,674 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 07:29:31,741 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:29:31,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-13 07:29:31,808 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-13 07:29:31,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 38 [2021-10-13 07:29:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-10-13 07:29:32,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-10-13 07:30:09,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029251273] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:30:09,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:30:09,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2021-10-13 07:30:09,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026561818] [2021-10-13 07:30:09,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 07:30:09,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:30:09,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 07:30:09,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=99, Unknown=6, NotChecked=0, Total=132 [2021-10-13 07:30:09,175 INFO L87 Difference]: Start difference. First operand 117 states and 128 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 07:30:18,717 WARN L207 SmtUtils]: Spent 8.44 s on a formula simplification that was a NOOP. DAG size: 54 [2021-10-13 07:30:24,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:24,479 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2021-10-13 07:30:24,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:30:24,480 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) Word has length 68 [2021-10-13 07:30:24,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:24,481 INFO L225 Difference]: With dead ends: 116 [2021-10-13 07:30:24,481 INFO L226 Difference]: Without dead ends: 116 [2021-10-13 07:30:24,482 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 391 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 24751.9ms TimeCoverageRelationStatistics Valid=69, Invalid=165, Unknown=6, NotChecked=0, Total=240 [2021-10-13 07:30:24,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-13 07:30:24,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-10-13 07:30:24,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 115 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 07:30:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2021-10-13 07:30:24,486 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 68 [2021-10-13 07:30:24,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:24,486 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2021-10-13 07:30:24,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 07:30:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2021-10-13 07:30:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-13 07:30:24,489 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:24,489 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:30:24,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:24,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:24,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:25,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:30:25,090 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 07:30:25,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:25,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1572522744, now seen corresponding path program 3 times [2021-10-13 07:30:25,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:30:25,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293862071] [2021-10-13 07:30:25,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:30:25,092 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:30:25,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:30:25,092 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:30:25,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-13 07:30:28,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-10-13 07:30:28,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-13 07:30:28,415 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:30:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:30:29,045 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:30:29,046 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:30:29,047 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 07:30:29,049 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 07:30:29,050 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 07:30:29,050 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 07:30:29,050 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 07:30:29,051 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 07:30:29,051 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 07:30:29,051 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 07:30:29,051 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:30:29,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:29,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:30:29,285 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:30:29,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:30:29 BoogieIcfgContainer [2021-10-13 07:30:29,408 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:30:29,408 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:30:29,408 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:30:29,409 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:30:29,409 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:23:41" (3/4) ... [2021-10-13 07:30:29,412 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:30:29,506 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:30:29,506 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:30:29,507 INFO L168 Benchmark]: Toolchain (without parser) took 408936.62 ms. Allocated memory was 60.8 MB in the beginning and 134.2 MB in the end (delta: 73.4 MB). Free memory was 40.5 MB in the beginning and 33.8 MB in the end (delta: 6.7 MB). Peak memory consumption was 79.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:29,508 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 60.8 MB. Free memory is still 41.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:30:29,509 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.51 ms. Allocated memory is still 60.8 MB. Free memory was 40.3 MB in the beginning and 30.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:29,509 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.18 ms. Allocated memory is still 60.8 MB. Free memory was 30.7 MB in the beginning and 44.3 MB in the end (delta: -13.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:29,510 INFO L168 Benchmark]: Boogie Preprocessor took 53.63 ms. Allocated memory is still 60.8 MB. Free memory was 44.3 MB in the beginning and 43.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:29,510 INFO L168 Benchmark]: RCFGBuilder took 471.30 ms. Allocated memory is still 60.8 MB. Free memory was 43.2 MB in the beginning and 32.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:29,511 INFO L168 Benchmark]: TraceAbstraction took 407960.12 ms. Allocated memory was 60.8 MB in the beginning and 134.2 MB in the end (delta: 73.4 MB). Free memory was 31.6 MB in the beginning and 38.5 MB in the end (delta: -6.9 MB). Peak memory consumption was 68.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:29,511 INFO L168 Benchmark]: Witness Printer took 98.24 ms. Allocated memory is still 134.2 MB. Free memory was 38.5 MB in the beginning and 33.8 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:29,514 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 60.8 MB. Free memory is still 41.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 292.51 ms. Allocated memory is still 60.8 MB. Free memory was 40.3 MB in the beginning and 30.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.18 ms. Allocated memory is still 60.8 MB. Free memory was 30.7 MB in the beginning and 44.3 MB in the end (delta: -13.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.63 ms. Allocated memory is still 60.8 MB. Free memory was 44.3 MB in the beginning and 43.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 471.30 ms. Allocated memory is still 60.8 MB. Free memory was 43.2 MB in the beginning and 32.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 407960.12 ms. Allocated memory was 60.8 MB in the beginning and 134.2 MB in the end (delta: 73.4 MB). Free memory was 31.6 MB in the beginning and 38.5 MB in the end (delta: -6.9 MB). Peak memory consumption was 68.3 MB. Max. memory is 16.1 GB. * Witness Printer took 98.24 ms. Allocated memory is still 134.2 MB. Free memory was 38.5 MB in the beginning and 33.8 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 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 - CounterExampleResult [Line: 26]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L1] int array[10]; VAL [array={3:0}] [L5] int i = 0; VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND FALSE !(i < 10) VAL [array={3:0}] [L9] return array; VAL [array={3:0}] [L13] int* numbers = getNumbers(); [L15] int numbers2[10]; [L17] int i = 0; VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND FALSE !(i < 10) VAL [array={3:0}] [L21] return numbers2; [L21] return numbers2; VAL [array={3:0}] [L25] int *numbers = getNumbers2(); [L26] numbers[0] = 100 - UnprovableResult [Line: 6]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 6]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 18]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 18]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 18]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 18]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 26]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 24]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 407734.9ms, OverallIterations: 17, TraceHistogramMax: 15, EmptinessCheckTime: 35.9ms, AutomataDifference: 130442.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 259 SDtfs, 3390 SDslu, 1148 SDs, 0 SdLazy, 2989 SolverSat, 564 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 41272.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2871 GetRequests, 2523 SyntacticMatches, 6 SemanticMatches, 342 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3813 ImplicationChecksByTransitivity, 176566.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=15, InterpolantAutomatonStates: 167, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 111.9ms AutomataMinimizationTime, 16 MinimizatonAttempts, 304 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 326.2ms SsaConstructionTime, 6325.2ms SatisfiabilityAnalysisTime, 234395.7ms InterpolantComputationTime, 1529 NumberOfCodeBlocks, 1337 NumberOfCodeBlocksAsserted, 104 NumberOfCheckSat, 2796 ConstructedInterpolants, 550 QuantifiedInterpolants, 48223 SizeOfPredicates, 79 NumberOfNonLiveVariables, 3441 ConjunctsInSsa, 385 ConjunctsInUnsatCore, 84 InterpolantComputations, 12 PerfectInterpolantSequences, 5729/8816 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 07:30:29,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25aa4e3-038e-4d00-a328-d6ad513ec8bd/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...