./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gr2006.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/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_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-lit/gr2006.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e5710d6b4e91b9251f64aef4f8b0515c8f0428d2 ................................................................................................................................................................................................................................................................................................................................................................................................. 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_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/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_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-lit/gr2006.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e5710d6b4e91b9251f64aef4f8b0515c8f0428d2 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:01:07,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:01:07,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:01:07,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:01:07,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:01:07,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:01:07,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:01:07,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:01:07,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:01:07,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:01:07,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:01:07,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:01:07,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:01:07,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:01:07,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:01:07,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:01:07,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:01:07,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:01:07,872 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:01:07,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:01:07,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:01:07,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:01:07,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:01:07,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:01:07,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:01:07,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:01:07,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:01:07,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:01:07,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:01:07,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:01:07,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:01:07,891 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:01:07,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:01:07,894 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:01:07,895 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:01:07,895 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:01:07,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:01:07,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:01:07,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:01:07,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:01:07,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:01:07,901 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 08:01:07,950 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:01:07,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:01:07,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:01:07,952 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:01:07,952 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:01:07,952 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:01:07,952 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:01:07,953 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:01:07,953 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:01:07,953 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:01:07,953 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:01:07,953 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:01:07,954 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:01:07,954 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:01:07,954 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:01:07,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:01:07,955 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:01:07,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:01:07,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:01:07,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:01:07,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:01:07,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:01:07,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:01:07,959 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:01:07,959 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:01:07,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:01:07,960 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:01:07,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:01:07,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:01:07,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:01:07,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:01:07,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:01:07,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:01:07,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:01:07,964 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:01:07,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:01:07,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:01:07,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:01:07,965 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:01:07,966 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_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5710d6b4e91b9251f64aef4f8b0515c8f0428d2 [2021-10-13 08:01:08,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:01:08,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:01:08,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:01:08,292 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:01:08,293 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:01:08,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-lit/gr2006.i [2021-10-13 08:01:08,376 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/data/f96230c2f/e275a72255634912b557e39d3b563b1f/FLAG61d38c09c [2021-10-13 08:01:08,871 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:01:08,871 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/sv-benchmarks/c/loop-lit/gr2006.i [2021-10-13 08:01:08,881 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/data/f96230c2f/e275a72255634912b557e39d3b563b1f/FLAG61d38c09c [2021-10-13 08:01:09,227 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/data/f96230c2f/e275a72255634912b557e39d3b563b1f [2021-10-13 08:01:09,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:01:09,233 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:01:09,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:01:09,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:01:09,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:01:09,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:01:09" (1/1) ... [2021-10-13 08:01:09,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a405b0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:09, skipping insertion in model container [2021-10-13 08:01:09,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:01:09" (1/1) ... [2021-10-13 08:01:09,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:01:09,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:01:09,449 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2021-10-13 08:01:09,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:01:09,469 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:01:09,484 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2021-10-13 08:01:09,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:01:09,502 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:01:09,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:09 WrapperNode [2021-10-13 08:01:09,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:01:09,505 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:01:09,505 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:01:09,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:01:09,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:09" (1/1) ... [2021-10-13 08:01:09,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:09" (1/1) ... [2021-10-13 08:01:09,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:01:09,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:01:09,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:01:09,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:01:09,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:09" (1/1) ... [2021-10-13 08:01:09,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:09" (1/1) ... [2021-10-13 08:01:09,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:09" (1/1) ... [2021-10-13 08:01:09,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:09" (1/1) ... [2021-10-13 08:01:09,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:09" (1/1) ... [2021-10-13 08:01:09,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:09" (1/1) ... [2021-10-13 08:01:09,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:09" (1/1) ... [2021-10-13 08:01:09,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:01:09,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:01:09,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:01:09,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:01:09,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:09" (1/1) ... [2021-10-13 08:01:09,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:01:09,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:01:09,602 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:01:09,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:01:09,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:01:09,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:01:09,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:01:09,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:01:09,973 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:01:09,973 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 08:01:09,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:01:09 BoogieIcfgContainer [2021-10-13 08:01:09,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:01:09,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:01:09,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:01:09,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:01:09,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:01:09" (1/3) ... [2021-10-13 08:01:09,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86a3830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:01:09, skipping insertion in model container [2021-10-13 08:01:09,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:09" (2/3) ... [2021-10-13 08:01:09,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86a3830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:01:09, skipping insertion in model container [2021-10-13 08:01:09,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:01:09" (3/3) ... [2021-10-13 08:01:09,985 INFO L111 eAbstractionObserver]: Analyzing ICFG gr2006.i [2021-10-13 08:01:09,990 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:01:09,991 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:01:10,045 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:01:10,052 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 08:01:10,053 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:01:10,081 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 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 08:01:10,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 08:01:10,087 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:10,087 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 08:01:10,088 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:01:10,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:10,094 INFO L82 PathProgramCache]: Analyzing trace with hash 68813335, now seen corresponding path program 1 times [2021-10-13 08:01:10,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:10,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473750028] [2021-10-13 08:01:10,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:10,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:10,343 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:10,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473750028] [2021-10-13 08:01:10,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473750028] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:10,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:10,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:01:10,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161230163] [2021-10-13 08:01:10,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:01:10,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:10,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:01:10,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:01:10,383 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 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) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:10,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:10,453 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-10-13 08:01:10,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:01:10,455 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 08:01:10,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:10,467 INFO L225 Difference]: With dead ends: 15 [2021-10-13 08:01:10,468 INFO L226 Difference]: Without dead ends: 7 [2021-10-13 08:01:10,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:01:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-13 08:01:10,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-13 08:01:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:10,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-13 08:01:10,507 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-10-13 08:01:10,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:10,508 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-13 08:01:10,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:10,509 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-13 08:01:10,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 08:01:10,509 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:10,509 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 08:01:10,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:01:10,510 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:01:10,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:10,518 INFO L82 PathProgramCache]: Analyzing trace with hash 2132108204, now seen corresponding path program 1 times [2021-10-13 08:01:10,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:10,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340315096] [2021-10-13 08:01:10,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:10,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:10,588 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:10,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340315096] [2021-10-13 08:01:10,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340315096] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:10,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:10,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:01:10,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566207863] [2021-10-13 08:01:10,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:01:10,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:01:10,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:01:10,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:01:10,593 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:10,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:10,616 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-10-13 08:01:10,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:01:10,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 08:01:10,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:10,617 INFO L225 Difference]: With dead ends: 14 [2021-10-13 08:01:10,617 INFO L226 Difference]: Without dead ends: 10 [2021-10-13 08:01:10,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:01:10,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-13 08:01:10,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-10-13 08:01:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-13 08:01:10,622 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-10-13 08:01:10,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:10,623 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-13 08:01:10,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:10,623 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-13 08:01:10,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:01:10,624 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:10,624 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:10,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 08:01:10,625 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:01:10,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:10,625 INFO L82 PathProgramCache]: Analyzing trace with hash 331117059, now seen corresponding path program 1 times [2021-10-13 08:01:10,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:01:10,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027921831] [2021-10-13 08:01:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:10,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:01:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:10,694 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:01:10,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027921831] [2021-10-13 08:01:10,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027921831] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:01:10,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516603763] [2021-10-13 08:01:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:10,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:10,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:01:10,698 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:01:10,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:01:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:10,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:01:10,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:10,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:11,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516603763] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:11,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [346685439] [2021-10-13 08:01:11,075 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-13 08:01:11,075 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:01:11,079 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:01:11,084 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:01:11,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:01:11,131 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:01:11,150 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:01:11,151 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:01:11,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-13 08:01:11,157 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:01:11,158 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:01:11,159 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 08:01:11,162 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-10-13 08:01:11,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:01:11,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:01:11,254 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 08:01:11,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 08:01:11,264 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:01:11,268 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 08:01:11,270 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:01:11,271 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 08:01:11,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 08:01:11,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:01:11,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:01:11,342 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:01:11,344 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-10-13 08:01:11,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 08:01:11,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:92, output treesize:80 [2021-10-13 08:01:11,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:11,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:11,547 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_8| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 08:01:11,550 INFO L168 Benchmark]: Toolchain (without parser) took 2316.67 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 52.4 MB in the beginning and 77.2 MB in the end (delta: -24.8 MB). Peak memory consumption was 19.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:01:11,550 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 88.1 MB. Free memory is still 68.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:01:11,551 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.02 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 52.2 MB in the beginning and 83.8 MB in the end (delta: -31.6 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-10-13 08:01:11,552 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.79 ms. Allocated memory is still 107.0 MB. Free memory was 83.6 MB in the beginning and 82.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:01:11,552 INFO L168 Benchmark]: Boogie Preprocessor took 22.84 ms. Allocated memory is still 107.0 MB. Free memory was 82.2 MB in the beginning and 81.3 MB in the end (delta: 949.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:01:11,553 INFO L168 Benchmark]: RCFGBuilder took 411.29 ms. Allocated memory is still 107.0 MB. Free memory was 81.3 MB in the beginning and 71.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:01:11,553 INFO L168 Benchmark]: TraceAbstraction took 1571.32 ms. Allocated memory is still 107.0 MB. Free memory was 70.8 MB in the beginning and 77.2 MB in the end (delta: -6.4 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:01:11,556 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 88.1 MB. Free memory is still 68.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 255.02 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 52.2 MB in the beginning and 83.8 MB in the end (delta: -31.6 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.79 ms. Allocated memory is still 107.0 MB. Free memory was 83.6 MB in the beginning and 82.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.84 ms. Allocated memory is still 107.0 MB. Free memory was 82.2 MB in the beginning and 81.3 MB in the end (delta: 949.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 411.29 ms. Allocated memory is still 107.0 MB. Free memory was 81.3 MB in the beginning and 71.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1571.32 ms. Allocated memory is still 107.0 MB. Free memory was 70.8 MB in the beginning and 77.2 MB in the end (delta: -6.4 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_8| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_8|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 08:01:11,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:01:14,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:01:14,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:01:14,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:01:14,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:01:14,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:01:14,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:01:14,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:01:14,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:01:14,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:01:14,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:01:14,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:01:14,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:01:14,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:01:14,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:01:14,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:01:14,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:01:14,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:01:14,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:01:14,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:01:14,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:01:14,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:01:14,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:01:14,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:01:14,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:01:14,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:01:14,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:01:14,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:01:14,160 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:01:14,166 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:01:14,166 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:01:14,167 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:01:14,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:01:14,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:01:14,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:01:14,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:01:14,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:01:14,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:01:14,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:01:14,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:01:14,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:01:14,178 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 08:01:14,224 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:01:14,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:01:14,226 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:01:14,226 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:01:14,226 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:01:14,226 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:01:14,226 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:01:14,227 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:01:14,228 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:01:14,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:01:14,230 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:01:14,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:01:14,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:01:14,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:01:14,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:01:14,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:01:14,232 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:01:14,232 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:01:14,232 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:01:14,232 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:01:14,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:01:14,233 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:01:14,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:01:14,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:01:14,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:01:14,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:01:14,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:01:14,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:01:14,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:01:14,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:01:14,235 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:01:14,235 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:01:14,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:01:14,235 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:01:14,236 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:01:14,236 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_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5710d6b4e91b9251f64aef4f8b0515c8f0428d2 [2021-10-13 08:01:14,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:01:14,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:01:14,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:01:14,650 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:01:14,651 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:01:14,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-lit/gr2006.i [2021-10-13 08:01:14,735 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/data/8acab14c6/80c9dd3b764b4e75b26d5ae6363fad3c/FLAG173f285e9 [2021-10-13 08:01:15,339 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:01:15,339 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/sv-benchmarks/c/loop-lit/gr2006.i [2021-10-13 08:01:15,346 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/data/8acab14c6/80c9dd3b764b4e75b26d5ae6363fad3c/FLAG173f285e9 [2021-10-13 08:01:15,731 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/data/8acab14c6/80c9dd3b764b4e75b26d5ae6363fad3c [2021-10-13 08:01:15,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:01:15,737 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:01:15,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:01:15,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:01:15,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:01:15,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:01:15" (1/1) ... [2021-10-13 08:01:15,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1161f2ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:15, skipping insertion in model container [2021-10-13 08:01:15,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:01:15" (1/1) ... [2021-10-13 08:01:15,754 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:01:15,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:01:15,944 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2021-10-13 08:01:15,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:01:15,964 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:01:15,978 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2021-10-13 08:01:15,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:01:15,995 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:01:15,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:15 WrapperNode [2021-10-13 08:01:15,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:01:15,997 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:01:15,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:01:15,997 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:01:16,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:15" (1/1) ... [2021-10-13 08:01:16,013 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:15" (1/1) ... [2021-10-13 08:01:16,032 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:01:16,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:01:16,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:01:16,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:01:16,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:15" (1/1) ... [2021-10-13 08:01:16,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:15" (1/1) ... [2021-10-13 08:01:16,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:15" (1/1) ... [2021-10-13 08:01:16,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:15" (1/1) ... [2021-10-13 08:01:16,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:15" (1/1) ... [2021-10-13 08:01:16,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:15" (1/1) ... [2021-10-13 08:01:16,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:15" (1/1) ... [2021-10-13 08:01:16,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:01:16,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:01:16,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:01:16,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:01:16,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:15" (1/1) ... [2021-10-13 08:01:16,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:01:16,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:01:16,098 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:01:16,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:01:16,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 08:01:16,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:01:16,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:01:16,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:01:16,349 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:01:16,349 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 08:01:16,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:01:16 BoogieIcfgContainer [2021-10-13 08:01:16,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:01:16,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:01:16,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:01:16,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:01:16,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:01:15" (1/3) ... [2021-10-13 08:01:16,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7fa249 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:01:16, skipping insertion in model container [2021-10-13 08:01:16,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:15" (2/3) ... [2021-10-13 08:01:16,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7fa249 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:01:16, skipping insertion in model container [2021-10-13 08:01:16,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:01:16" (3/3) ... [2021-10-13 08:01:16,379 INFO L111 eAbstractionObserver]: Analyzing ICFG gr2006.i [2021-10-13 08:01:16,385 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:01:16,385 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:01:16,450 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:01:16,458 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 08:01:16,459 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:01:16,471 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 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 08:01:16,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 08:01:16,476 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:16,477 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 08:01:16,478 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:01:16,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:16,484 INFO L82 PathProgramCache]: Analyzing trace with hash 890091623, now seen corresponding path program 1 times [2021-10-13 08:01:16,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:16,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6833542] [2021-10-13 08:01:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:16,498 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:16,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:16,501 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:16,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:01:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:16,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 08:01:16,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:16,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:16,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:16,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6833542] [2021-10-13 08:01:16,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6833542] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:16,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:16,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:01:16,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272808298] [2021-10-13 08:01:16,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:01:16,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:16,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:01:16,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:01:16,729 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:16,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:16,743 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2021-10-13 08:01:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:01:16,745 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 08:01:16,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:16,753 INFO L225 Difference]: With dead ends: 21 [2021-10-13 08:01:16,753 INFO L226 Difference]: Without dead ends: 9 [2021-10-13 08:01:16,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:01:16,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-13 08:01:16,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-13 08:01:16,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:16,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-13 08:01:16,790 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-10-13 08:01:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:16,791 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-13 08:01:16,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-13 08:01:16,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:01:16,793 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:16,793 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:16,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:17,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:17,005 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:01:17,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:17,010 INFO L82 PathProgramCache]: Analyzing trace with hash 297871632, now seen corresponding path program 1 times [2021-10-13 08:01:17,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:17,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602943582] [2021-10-13 08:01:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:17,013 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:17,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:17,014 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:17,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:01:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:17,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:01:17,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:17,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:17,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:17,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602943582] [2021-10-13 08:01:17,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602943582] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:17,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:17,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 08:01:17,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594261787] [2021-10-13 08:01:17,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:01:17,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:17,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:01:17,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:01:17,213 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 08:01:17,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:17,240 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-10-13 08:01:17,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:01:17,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 8 [2021-10-13 08:01:17,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:17,242 INFO L225 Difference]: With dead ends: 30 [2021-10-13 08:01:17,242 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 08:01:17,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:01:17,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 08:01:17,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2021-10-13 08:01:17,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:17,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-13 08:01:17,248 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-10-13 08:01:17,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:17,249 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-13 08:01:17,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 08:01:17,249 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-13 08:01:17,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:01:17,250 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:17,250 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:17,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:17,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:17,461 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:01:17,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:17,468 INFO L82 PathProgramCache]: Analyzing trace with hash 296024590, now seen corresponding path program 1 times [2021-10-13 08:01:17,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:17,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866360956] [2021-10-13 08:01:17,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:17,469 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:17,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:17,471 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:17,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:01:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:17,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:01:17,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:17,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:17,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:17,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866360956] [2021-10-13 08:01:17,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866360956] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:01:17,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:01:17,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 08:01:17,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310664240] [2021-10-13 08:01:17,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:01:17,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:17,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:01:17,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:01:17,610 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:17,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:17,667 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-10-13 08:01:17,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:01:17,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 08:01:17,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:17,671 INFO L225 Difference]: With dead ends: 27 [2021-10-13 08:01:17,671 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 08:01:17,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:01:17,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 08:01:17,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2021-10-13 08:01:17,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:17,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-10-13 08:01:17,676 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 8 [2021-10-13 08:01:17,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:17,676 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-10-13 08:01:17,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:17,676 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-10-13 08:01:17,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 08:01:17,677 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:17,677 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:17,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:17,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:17,878 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:01:17,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:17,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1527752176, now seen corresponding path program 1 times [2021-10-13 08:01:17,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:17,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190522399] [2021-10-13 08:01:17,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:17,880 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:17,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:17,885 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:17,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 08:01:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:17,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:01:17,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:18,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:18,236 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:18,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190522399] [2021-10-13 08:01:18,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190522399] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:18,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1326267402] [2021-10-13 08:01:18,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:18,237 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:01:18,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:01:18,249 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:01:18,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-13 08:01:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:18,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:01:18,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:18,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:18,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1326267402] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:18,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331973138] [2021-10-13 08:01:18,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:18,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:18,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:01:18,553 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:01:18,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 08:01:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:18,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:01:18,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:18,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:18,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331973138] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:18,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:01:18,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 10 [2021-10-13 08:01:18,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840732881] [2021-10-13 08:01:18,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 08:01:18,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:18,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 08:01:18,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:01:18,811 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:19,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:19,292 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2021-10-13 08:01:19,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 08:01:19,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 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 14 [2021-10-13 08:01:19,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:19,294 INFO L225 Difference]: With dead ends: 54 [2021-10-13 08:01:19,294 INFO L226 Difference]: Without dead ends: 43 [2021-10-13 08:01:19,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 439.4ms TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-10-13 08:01:19,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-13 08:01:19,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2021-10-13 08:01:19,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:19,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-10-13 08:01:19,305 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 14 [2021-10-13 08:01:19,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:19,305 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-10-13 08:01:19,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:19,306 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-10-13 08:01:19,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 08:01:19,306 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:19,307 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:19,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:19,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:19,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-10-13 08:01:19,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:01:19,920 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:01:19,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:19,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1637401627, now seen corresponding path program 1 times [2021-10-13 08:01:19,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:19,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366543356] [2021-10-13 08:01:19,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:19,922 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:19,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:19,923 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:19,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 08:01:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:20,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:01:20,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:20,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:20,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:20,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366543356] [2021-10-13 08:01:20,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366543356] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:20,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [174402097] [2021-10-13 08:01:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:20,286 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:01:20,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:01:20,292 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:01:20,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-13 08:01:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:20,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:01:20,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:20,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:20,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [174402097] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:20,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061339939] [2021-10-13 08:01:20,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:20,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:20,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:01:20,593 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:01:20,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 08:01:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:20,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 08:01:20,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:20,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:21,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061339939] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:21,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:01:21,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 8] total 16 [2021-10-13 08:01:21,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495630821] [2021-10-13 08:01:21,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 08:01:21,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:21,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 08:01:21,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-10-13 08:01:21,075 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:21,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:21,576 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2021-10-13 08:01:21,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 08:01:21,577 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 17 [2021-10-13 08:01:21,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:21,578 INFO L225 Difference]: With dead ends: 63 [2021-10-13 08:01:21,579 INFO L226 Difference]: Without dead ends: 59 [2021-10-13 08:01:21,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 538.8ms TimeCoverageRelationStatistics Valid=204, Invalid=348, Unknown=0, NotChecked=0, Total=552 [2021-10-13 08:01:21,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-13 08:01:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-10-13 08:01:21,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:21,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2021-10-13 08:01:21,589 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 17 [2021-10-13 08:01:21,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:21,589 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2021-10-13 08:01:21,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:21,590 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2021-10-13 08:01:21,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 08:01:21,591 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:21,591 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 6, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:21,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:21,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-10-13 08:01:22,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-13 08:01:22,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:22,213 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:01:22,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:22,214 INFO L82 PathProgramCache]: Analyzing trace with hash 184775451, now seen corresponding path program 2 times [2021-10-13 08:01:22,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:22,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531007642] [2021-10-13 08:01:22,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:01:22,215 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:22,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:22,216 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:22,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 08:01:22,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:01:22,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:01:22,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:01:22,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 08:01:22,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 08:01:22,763 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:22,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531007642] [2021-10-13 08:01:22,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531007642] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:22,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [927398627] [2021-10-13 08:01:22,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:01:22,764 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:01:22,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:01:22,765 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:01:22,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-13 08:01:22,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:01:22,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:01:22,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:01:22,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 08:01:23,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 08:01:23,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [927398627] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:23,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556562024] [2021-10-13 08:01:23,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:01:23,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:23,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:01:23,176 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:01:23,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 08:01:23,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:01:23,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:01:23,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 08:01:23,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 08:01:23,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:01:24,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556562024] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:24,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:01:24,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 11] total 23 [2021-10-13 08:01:24,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641947732] [2021-10-13 08:01:24,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 08:01:24,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:24,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 08:01:24,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2021-10-13 08:01:24,030 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:25,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:25,474 INFO L93 Difference]: Finished difference Result 277 states and 377 transitions. [2021-10-13 08:01:25,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 08:01:25,475 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-13 08:01:25,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:25,479 INFO L225 Difference]: With dead ends: 277 [2021-10-13 08:01:25,479 INFO L226 Difference]: Without dead ends: 273 [2021-10-13 08:01:25,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1488.1ms TimeCoverageRelationStatistics Valid=512, Invalid=970, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 08:01:25,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-10-13 08:01:25,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 84. [2021-10-13 08:01:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.2771084337349397) internal successors, (106), 83 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:25,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2021-10-13 08:01:25,501 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 29 [2021-10-13 08:01:25,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:25,502 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2021-10-13 08:01:25,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:25,503 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2021-10-13 08:01:25,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 08:01:25,504 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:25,504 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 7, 3, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:25,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:25,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:25,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-10-13 08:01:26,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:01:26,121 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:01:26,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:26,122 INFO L82 PathProgramCache]: Analyzing trace with hash -475584579, now seen corresponding path program 3 times [2021-10-13 08:01:26,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:26,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893731247] [2021-10-13 08:01:26,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:01:26,123 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:26,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:26,128 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:26,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 08:01:26,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-13 08:01:26,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:01:26,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:01:26,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 76 proven. 37 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-13 08:01:26,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 76 proven. 37 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-13 08:01:26,831 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:26,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893731247] [2021-10-13 08:01:26,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893731247] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:26,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [498458924] [2021-10-13 08:01:26,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:01:26,832 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:01:26,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:01:26,833 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:01:26,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-13 08:01:27,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-13 08:01:27,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:01:27,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:01:27,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 76 proven. 37 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-13 08:01:27,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 76 proven. 37 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-13 08:01:27,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [498458924] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:27,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125791347] [2021-10-13 08:01:27,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:01:27,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:27,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:01:27,456 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:01:27,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 08:01:27,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-13 08:01:27,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:01:27,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:01:27,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 79 proven. 33 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-13 08:01:27,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 76 proven. 37 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-13 08:01:28,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125791347] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:28,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:01:28,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2021-10-13 08:01:28,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777081734] [2021-10-13 08:01:28,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 08:01:28,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:28,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 08:01:28,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-10-13 08:01:28,189 INFO L87 Difference]: Start difference. First operand 84 states and 106 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:28,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:28,587 INFO L93 Difference]: Finished difference Result 219 states and 276 transitions. [2021-10-13 08:01:28,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 08:01:28,588 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-13 08:01:28,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:28,590 INFO L225 Difference]: With dead ends: 219 [2021-10-13 08:01:28,590 INFO L226 Difference]: Without dead ends: 215 [2021-10-13 08:01:28,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 509.4ms TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2021-10-13 08:01:28,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-10-13 08:01:28,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 97. [2021-10-13 08:01:28,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.28125) internal successors, (123), 96 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:28,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 123 transitions. [2021-10-13 08:01:28,608 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 123 transitions. Word has length 35 [2021-10-13 08:01:28,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:28,608 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 123 transitions. [2021-10-13 08:01:28,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:28,609 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 123 transitions. [2021-10-13 08:01:28,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 08:01:28,610 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:28,611 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 7, 4, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:28,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:28,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:29,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:29,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:29,227 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:01:29,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:29,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2004788242, now seen corresponding path program 4 times [2021-10-13 08:01:29,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:29,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149346487] [2021-10-13 08:01:29,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 08:01:29,228 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:29,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:29,229 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:29,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 08:01:29,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 08:01:29,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:01:29,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:01:29,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 76 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 08:01:29,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 76 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 08:01:30,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:30,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149346487] [2021-10-13 08:01:30,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149346487] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:30,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1410573207] [2021-10-13 08:01:30,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 08:01:30,035 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:01:30,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:01:30,036 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:01:30,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-13 08:01:30,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 08:01:30,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:01:30,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:01:30,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 76 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 08:01:30,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 76 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 08:01:30,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1410573207] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:30,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815440970] [2021-10-13 08:01:30,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 08:01:30,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:30,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:01:30,732 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:01:30,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 08:01:31,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 08:01:31,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:01:31,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:01:31,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 76 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 08:01:31,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 76 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 08:01:31,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815440970] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:31,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:01:31,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 11] total 25 [2021-10-13 08:01:31,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337473098] [2021-10-13 08:01:31,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 08:01:31,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:31,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 08:01:31,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-10-13 08:01:31,780 INFO L87 Difference]: Start difference. First operand 97 states and 123 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:32,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:32,649 INFO L93 Difference]: Finished difference Result 194 states and 242 transitions. [2021-10-13 08:01:32,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 08:01:32,651 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-13 08:01:32,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:32,652 INFO L225 Difference]: With dead ends: 194 [2021-10-13 08:01:32,652 INFO L226 Difference]: Without dead ends: 116 [2021-10-13 08:01:32,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1268.4ms TimeCoverageRelationStatistics Valid=389, Invalid=733, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 08:01:32,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-13 08:01:32,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 89. [2021-10-13 08:01:32,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1363636363636365) internal successors, (100), 88 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2021-10-13 08:01:32,664 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 38 [2021-10-13 08:01:32,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:32,670 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2021-10-13 08:01:32,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:32,671 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2021-10-13 08:01:32,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-13 08:01:32,677 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:32,677 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:32,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:32,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:33,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-13 08:01:33,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:33,289 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:01:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:33,290 INFO L82 PathProgramCache]: Analyzing trace with hash 912896155, now seen corresponding path program 2 times [2021-10-13 08:01:33,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:33,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333022434] [2021-10-13 08:01:33,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:01:33,291 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:33,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:33,292 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:33,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 08:01:33,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:01:33,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:01:33,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 08:01:33,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:33,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:34,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:34,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333022434] [2021-10-13 08:01:34,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333022434] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:34,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [699692804] [2021-10-13 08:01:34,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:01:34,396 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:01:34,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:01:34,404 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:01:34,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-10-13 08:01:34,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:01:34,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:01:34,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 08:01:34,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:35,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:35,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [699692804] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:35,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224777689] [2021-10-13 08:01:35,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:01:35,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:35,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:01:35,177 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:01:35,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 08:01:35,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:01:35,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:01:35,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 08:01:35,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:35,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:36,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224777689] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:36,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:01:36,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15, 16] total 40 [2021-10-13 08:01:36,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935226894] [2021-10-13 08:01:36,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-13 08:01:36,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:36,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-13 08:01:36,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=1080, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 08:01:36,783 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 40 states, 40 states have (on average 2.8) internal successors, (112), 40 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:40,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:40,200 INFO L93 Difference]: Finished difference Result 574 states and 691 transitions. [2021-10-13 08:01:40,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-13 08:01:40,201 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.8) internal successors, (112), 40 states have internal predecessors, (112), 0 states have call successors, (0), 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 41 [2021-10-13 08:01:40,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:40,204 INFO L225 Difference]: With dead ends: 574 [2021-10-13 08:01:40,204 INFO L226 Difference]: Without dead ends: 570 [2021-10-13 08:01:40,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 3923.3ms TimeCoverageRelationStatistics Valid=1364, Invalid=2668, Unknown=0, NotChecked=0, Total=4032 [2021-10-13 08:01:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-10-13 08:01:40,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 359. [2021-10-13 08:01:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.1536312849162011) internal successors, (413), 358 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:40,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 413 transitions. [2021-10-13 08:01:40,248 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 413 transitions. Word has length 41 [2021-10-13 08:01:40,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:40,248 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 413 transitions. [2021-10-13 08:01:40,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.8) internal successors, (112), 40 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 413 transitions. [2021-10-13 08:01:40,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-13 08:01:40,251 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:40,251 INFO L512 BasicCegarLoop]: trace histogram [20, 19, 16, 4, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:40,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:40,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:40,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:40,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:40,864 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:01:40,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:40,865 INFO L82 PathProgramCache]: Analyzing trace with hash -138371429, now seen corresponding path program 5 times [2021-10-13 08:01:40,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:40,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524808162] [2021-10-13 08:01:40,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 08:01:40,866 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:40,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:40,867 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:40,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 08:01:41,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-10-13 08:01:41,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:01:41,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 08:01:41,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 166 proven. 392 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 08:01:41,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 166 proven. 392 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 08:01:43,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:43,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524808162] [2021-10-13 08:01:43,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524808162] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:43,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2105109965] [2021-10-13 08:01:43,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 08:01:43,083 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:01:43,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:01:43,084 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:01:43,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-10-13 08:01:43,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-10-13 08:01:43,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:01:43,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 08:01:43,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 166 proven. 392 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 08:01:43,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 166 proven. 392 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 08:01:46,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2105109965] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:46,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269185750] [2021-10-13 08:01:46,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 08:01:46,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:46,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:01:46,079 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:01:46,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 08:01:46,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-10-13 08:01:46,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:01:46,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 08:01:46,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 08:01:48,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 40 proven. 523 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-13 08:01:51,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269185750] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:51,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:01:51,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19, 20, 19, 21] total 89 [2021-10-13 08:01:51,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682816219] [2021-10-13 08:01:51,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-10-13 08:01:51,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:51,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-10-13 08:01:51,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=6700, Unknown=0, NotChecked=0, Total=7832 [2021-10-13 08:01:51,431 INFO L87 Difference]: Start difference. First operand 359 states and 413 transitions. Second operand has 89 states, 89 states have (on average 3.033707865168539) internal successors, (270), 89 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:24,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:24,446 INFO L93 Difference]: Finished difference Result 731 states and 835 transitions. [2021-10-13 08:02:24,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-10-13 08:02:24,448 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.033707865168539) internal successors, (270), 89 states have internal predecessors, (270), 0 states have call successors, (0), 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 65 [2021-10-13 08:02:24,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:24,451 INFO L225 Difference]: With dead ends: 731 [2021-10-13 08:02:24,451 INFO L226 Difference]: Without dead ends: 433 [2021-10-13 08:02:24,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5506 ImplicationChecksByTransitivity, 38549.2ms TimeCoverageRelationStatistics Valid=7649, Invalid=24571, Unknown=0, NotChecked=0, Total=32220 [2021-10-13 08:02:24,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-10-13 08:02:24,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 355. [2021-10-13 08:02:24,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.1016949152542372) internal successors, (390), 354 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 390 transitions. [2021-10-13 08:02:24,493 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 390 transitions. Word has length 65 [2021-10-13 08:02:24,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:24,494 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 390 transitions. [2021-10-13 08:02:24,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.033707865168539) internal successors, (270), 89 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:24,495 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 390 transitions. [2021-10-13 08:02:24,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-13 08:02:24,496 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:24,496 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:24,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:24,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:24,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-13 08:02:25,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:25,100 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:02:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:25,100 INFO L82 PathProgramCache]: Analyzing trace with hash -708881797, now seen corresponding path program 3 times [2021-10-13 08:02:25,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:25,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745659872] [2021-10-13 08:02:25,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:02:25,101 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:25,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:25,102 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:25,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 08:02:25,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-10-13 08:02:25,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:02:25,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 08:02:25,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:26,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:29,016 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:29,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745659872] [2021-10-13 08:02:29,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745659872] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:29,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [523848357] [2021-10-13 08:02:29,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:02:29,017 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:02:29,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:02:29,018 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:02:29,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-10-13 08:02:29,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-10-13 08:02:29,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:02:29,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 08:02:29,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:30,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:31,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [523848357] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:31,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385957386] [2021-10-13 08:02:31,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:02:31,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:31,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:02:31,041 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:02:31,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-13 08:02:31,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-10-13 08:02:31,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:02:31,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 08:02:31,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:32,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:32,753 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:32,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385957386] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:32,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:02:32,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 29, 30, 29, 30] total 57 [2021-10-13 08:02:32,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379130299] [2021-10-13 08:02:32,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-10-13 08:02:32,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:02:32,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-10-13 08:02:32,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=868, Invalid=2324, Unknown=0, NotChecked=0, Total=3192 [2021-10-13 08:02:32,759 INFO L87 Difference]: Start difference. First operand 355 states and 390 transitions. Second operand has 57 states, 57 states have (on average 2.8421052631578947) internal successors, (162), 57 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:55,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:55,406 INFO L93 Difference]: Finished difference Result 5381 states and 6049 transitions. [2021-10-13 08:02:55,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-10-13 08:02:55,407 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.8421052631578947) internal successors, (162), 57 states have internal predecessors, (162), 0 states have call successors, (0), 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 83 [2021-10-13 08:02:55,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:55,439 INFO L225 Difference]: With dead ends: 5381 [2021-10-13 08:02:55,439 INFO L226 Difference]: Without dead ends: 5377 [2021-10-13 08:02:55,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 23197.9ms TimeCoverageRelationStatistics Valid=4132, Invalid=7640, Unknown=0, NotChecked=0, Total=11772 [2021-10-13 08:02:55,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5377 states. [2021-10-13 08:02:55,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5377 to 1305. [2021-10-13 08:02:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 1.107361963190184) internal successors, (1444), 1304 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:55,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 1444 transitions. [2021-10-13 08:02:55,664 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 1444 transitions. Word has length 83 [2021-10-13 08:02:55,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:55,664 INFO L470 AbstractCegarLoop]: Abstraction has 1305 states and 1444 transitions. [2021-10-13 08:02:55,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.8421052631578947) internal successors, (162), 57 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:55,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 1444 transitions. [2021-10-13 08:02:55,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-13 08:02:55,667 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:55,667 INFO L512 BasicCegarLoop]: trace histogram [39, 38, 34, 5, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:55,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:55,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-13 08:02:56,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:56,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:02:56,281 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:02:56,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:56,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1584413648, now seen corresponding path program 6 times [2021-10-13 08:02:56,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:56,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778581913] [2021-10-13 08:02:56,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 08:02:56,282 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:56,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:56,283 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:56,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-13 08:02:57,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-10-13 08:02:57,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:02:57,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 08:02:57,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 874 proven. 121 refuted. 0 times theorem prover too weak. 1228 trivial. 0 not checked. [2021-10-13 08:02:57,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 874 proven. 121 refuted. 0 times theorem prover too weak. 1228 trivial. 0 not checked. [2021-10-13 08:02:58,057 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:58,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778581913] [2021-10-13 08:02:58,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778581913] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:58,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2038168078] [2021-10-13 08:02:58,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 08:02:58,058 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:02:58,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:02:58,059 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:02:58,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-10-13 08:02:59,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-10-13 08:02:59,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:02:59,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 08:02:59,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 874 proven. 121 refuted. 0 times theorem prover too weak. 1228 trivial. 0 not checked. [2021-10-13 08:02:59,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 874 proven. 121 refuted. 0 times theorem prover too weak. 1228 trivial. 0 not checked. [2021-10-13 08:03:00,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2038168078] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:03:00,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766418421] [2021-10-13 08:03:00,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 08:03:00,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:03:00,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:03:00,023 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:03:00,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-13 08:03:01,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-10-13 08:03:01,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:03:01,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 08:03:01,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 877 proven. 117 refuted. 0 times theorem prover too weak. 1229 trivial. 0 not checked. [2021-10-13 08:03:01,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 874 proven. 121 refuted. 0 times theorem prover too weak. 1228 trivial. 0 not checked. [2021-10-13 08:03:02,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766418421] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:03:02,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:03:02,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 20 [2021-10-13 08:03:02,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417086346] [2021-10-13 08:03:02,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 08:03:02,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:03:02,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 08:03:02,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-10-13 08:03:02,082 INFO L87 Difference]: Start difference. First operand 1305 states and 1444 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:03,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:03:03,306 INFO L93 Difference]: Finished difference Result 1997 states and 2191 transitions. [2021-10-13 08:03:03,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 08:03:03,307 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 122 [2021-10-13 08:03:03,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:03:03,315 INFO L225 Difference]: With dead ends: 1997 [2021-10-13 08:03:03,315 INFO L226 Difference]: Without dead ends: 1993 [2021-10-13 08:03:03,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1294.1ms TimeCoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 08:03:03,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-10-13 08:03:03,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1362. [2021-10-13 08:03:03,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 1.1160911094783248) internal successors, (1519), 1361 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:03,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1519 transitions. [2021-10-13 08:03:03,455 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1519 transitions. Word has length 122 [2021-10-13 08:03:03,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:03:03,456 INFO L470 AbstractCegarLoop]: Abstraction has 1362 states and 1519 transitions. [2021-10-13 08:03:03,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:03,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1519 transitions. [2021-10-13 08:03:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-10-13 08:03:03,457 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:03:03,458 INFO L512 BasicCegarLoop]: trace histogram [40, 39, 34, 6, 1, 1, 1, 1, 1, 1] [2021-10-13 08:03:03,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-13 08:03:03,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-10-13 08:03:03,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-13 08:03:04,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:03:04,061 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:03:04,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:03:04,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1756858011, now seen corresponding path program 7 times [2021-10-13 08:03:04,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:03:04,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933989346] [2021-10-13 08:03:04,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 08:03:04,062 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:03:04,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:03:04,063 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:03:04,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-13 08:03:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:05,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-13 08:03:05,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 554 proven. 1751 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-13 08:03:05,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 554 proven. 1751 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-13 08:03:08,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:03:08,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933989346] [2021-10-13 08:03:08,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933989346] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:03:08,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [742502555] [2021-10-13 08:03:08,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 08:03:08,708 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:03:08,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:03:08,718 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:03:08,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-10-13 08:03:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:10,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-13 08:03:10,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:10,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 554 proven. 1751 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-13 08:03:10,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 554 proven. 1751 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-13 08:03:10,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [742502555] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:03:10,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908819520] [2021-10-13 08:03:10,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 08:03:10,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:03:10,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:03:10,881 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:03:10,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-13 08:03:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:12,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-13 08:03:12,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 2324 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 08:03:14,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:23,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 88 proven. 2239 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-13 08:03:23,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908819520] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:03:23,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:03:23,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37, 37, 37, 39] total 144 [2021-10-13 08:03:23,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473597916] [2021-10-13 08:03:23,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2021-10-13 08:03:23,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:03:23,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-10-13 08:03:23,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2667, Invalid=17925, Unknown=0, NotChecked=0, Total=20592 [2021-10-13 08:03:23,505 INFO L87 Difference]: Start difference. First operand 1362 states and 1519 transitions. Second operand has 144 states, 144 states have (on average 3.0694444444444446) internal successors, (442), 144 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:04:03,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:03,796 INFO L93 Difference]: Finished difference Result 2982 states and 3277 transitions. [2021-10-13 08:04:03,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-10-13 08:04:03,800 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 3.0694444444444446) internal successors, (442), 144 states have internal predecessors, (442), 0 states have call successors, (0), 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 125 [2021-10-13 08:04:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:03,809 INFO L225 Difference]: With dead ends: 2982 [2021-10-13 08:04:03,809 INFO L226 Difference]: Without dead ends: 1750 [2021-10-13 08:04:03,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 857 GetRequests, 602 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9894 ImplicationChecksByTransitivity, 50767.2ms TimeCoverageRelationStatistics Valid=12986, Invalid=52806, Unknown=0, NotChecked=0, Total=65792 [2021-10-13 08:04:03,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2021-10-13 08:04:04,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1251. [2021-10-13 08:04:04,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 1.0976) internal successors, (1372), 1250 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:04:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1372 transitions. [2021-10-13 08:04:04,009 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1372 transitions. Word has length 125 [2021-10-13 08:04:04,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:04,010 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 1372 transitions. [2021-10-13 08:04:04,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 3.0694444444444446) internal successors, (442), 144 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:04:04,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1372 transitions. [2021-10-13 08:04:04,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-10-13 08:04:04,013 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:04,013 INFO L512 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:04,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:04,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-13 08:04:04,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:04,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:04:04,647 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:04,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:04,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1431277115, now seen corresponding path program 4 times [2021-10-13 08:04:04,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:04:04,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866732975] [2021-10-13 08:04:04,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 08:04:04,649 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:04:04,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:04:04,651 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:04:04,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-13 08:04:06,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 08:04:06,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:04:06,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-13 08:04:06,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 506 proven. 3775 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 08:04:07,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 506 proven. 3775 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 08:04:14,358 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:04:14,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866732975] [2021-10-13 08:04:14,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866732975] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:14,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [877045476] [2021-10-13 08:04:14,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 08:04:14,358 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:04:14,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:04:14,359 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:04:14,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-10-13 08:04:16,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 08:04:16,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:04:16,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-13 08:04:16,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 506 proven. 3775 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 08:04:16,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 506 proven. 3775 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 08:04:17,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [877045476] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:17,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342003534] [2021-10-13 08:04:17,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 08:04:17,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:17,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:17,048 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:04:17,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-13 08:04:18,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 08:04:18,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:04:18,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-13 08:04:18,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 0 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:04:24,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 0 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:04:42,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342003534] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:42,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:04:42,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53, 53, 57, 58] total 215 [2021-10-13 08:04:42,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735707510] [2021-10-13 08:04:42,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 215 states [2021-10-13 08:04:42,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:04:42,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 215 interpolants. [2021-10-13 08:04:42,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4834, Invalid=41176, Unknown=0, NotChecked=0, Total=46010 [2021-10-13 08:04:42,130 INFO L87 Difference]: Start difference. First operand 1251 states and 1372 transitions. Second operand has 215 states, 215 states have (on average 2.9767441860465116) internal successors, (640), 215 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:29,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:29,665 INFO L93 Difference]: Finished difference Result 34553 states and 38306 transitions. [2021-10-13 08:11:29,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 315 states. [2021-10-13 08:11:29,670 INFO L78 Accepts]: Start accepts. Automaton has has 215 states, 215 states have (on average 2.9767441860465116) internal successors, (640), 215 states have internal predecessors, (640), 0 states have call successors, (0), 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 167 [2021-10-13 08:11:29,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:29,791 INFO L225 Difference]: With dead ends: 34553 [2021-10-13 08:11:29,791 INFO L226 Difference]: Without dead ends: 33408 [2021-10-13 08:11:29,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1308 GetRequests, 783 SyntacticMatches, 0 SemanticMatches, 525 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65621 ImplicationChecksByTransitivity, 418602.0ms TimeCoverageRelationStatistics Valid=48485, Invalid=228717, Unknown=0, NotChecked=0, Total=277202 [2021-10-13 08:11:29,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33408 states. [2021-10-13 08:11:31,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33408 to 3328. [2021-10-13 08:11:31,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3327 states have (on average 1.1042981665163811) internal successors, (3674), 3327 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 3674 transitions. [2021-10-13 08:11:31,222 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 3674 transitions. Word has length 167 [2021-10-13 08:11:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:31,222 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 3674 transitions. [2021-10-13 08:11:31,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 215 states, 215 states have (on average 2.9767441860465116) internal successors, (640), 215 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 3674 transitions. [2021-10-13 08:11:31,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-10-13 08:11:31,228 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:31,229 INFO L512 BasicCegarLoop]: trace histogram [101, 100, 51, 50, 1, 1, 1, 1, 1, 1] [2021-10-13 08:11:31,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-13 08:11:31,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-13 08:11:31,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-10-13 08:11:31,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:11:31,845 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:11:31,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:31,845 INFO L82 PathProgramCache]: Analyzing trace with hash -338193904, now seen corresponding path program 8 times [2021-10-13 08:11:31,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:11:31,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579752093] [2021-10-13 08:11:31,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:11:31,846 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:11:31,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:11:31,847 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:11:31,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-13 08:11:33,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:11:33,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:11:33,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 105 conjunts are in the unsatisfiable core [2021-10-13 08:11:33,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:11:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:38,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:02,923 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:12:02,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579752093] [2021-10-13 08:12:02,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579752093] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:02,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1384990829] [2021-10-13 08:12:02,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:12:02,924 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:12:02,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:12:02,926 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:12:02,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-10-13 08:12:05,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:12:05,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:12:05,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 104 conjunts are in the unsatisfiable core [2021-10-13 08:12:05,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:06,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:07,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1384990829] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:07,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036272344] [2021-10-13 08:12:07,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:12:07,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:12:07,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:12:07,177 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:12:07,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-13 08:12:09,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:12:09,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:12:09,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 106 conjunts are in the unsatisfiable core [2021-10-13 08:12:09,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:10,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:12,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036272344] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:12,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:12:12,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 105, 104, 104, 104, 105] total 206 [2021-10-13 08:12:12,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766533111] [2021-10-13 08:12:12,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2021-10-13 08:12:12,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:12:12,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2021-10-13 08:12:12,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1786, Invalid=40444, Unknown=0, NotChecked=0, Total=42230 [2021-10-13 08:12:12,998 INFO L87 Difference]: Start difference. First operand 3328 states and 3674 transitions. Second operand has 206 states, 206 states have (on average 2.9757281553398056) internal successors, (613), 206 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:28,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:28,225 INFO L93 Difference]: Finished difference Result 3336 states and 3680 transitions. [2021-10-13 08:12:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-10-13 08:12:28,226 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 2.9757281553398056) internal successors, (613), 206 states have internal predecessors, (613), 0 states have call successors, (0), 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 308 [2021-10-13 08:12:28,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:28,234 INFO L225 Difference]: With dead ends: 3336 [2021-10-13 08:12:28,235 INFO L226 Difference]: Without dead ends: 3332 [2021-10-13 08:12:28,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1843 GetRequests, 1638 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5151 ImplicationChecksByTransitivity, 25757.3ms TimeCoverageRelationStatistics Valid=1792, Invalid=40850, Unknown=0, NotChecked=0, Total=42642 [2021-10-13 08:12:28,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2021-10-13 08:12:29,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 3328. [2021-10-13 08:12:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3327 states have (on average 1.1039975954313195) internal successors, (3673), 3327 states have internal predecessors, (3673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:29,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 3673 transitions. [2021-10-13 08:12:29,232 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 3673 transitions. Word has length 308 [2021-10-13 08:12:29,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:29,233 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 3673 transitions. [2021-10-13 08:12:29,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 2.9757281553398056) internal successors, (613), 206 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:29,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 3673 transitions. [2021-10-13 08:12:29,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-10-13 08:12:29,239 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:29,239 INFO L512 BasicCegarLoop]: trace histogram [102, 101, 52, 50, 1, 1, 1, 1, 1, 1] [2021-10-13 08:12:29,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:29,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:29,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:29,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:12:29,847 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:12:29,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:29,847 INFO L82 PathProgramCache]: Analyzing trace with hash -2103022405, now seen corresponding path program 9 times [2021-10-13 08:12:29,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:29,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127288244] [2021-10-13 08:12:29,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:12:29,849 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:29,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:29,850 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:29,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-13 08:12:33,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 102 check-sat command(s) [2021-10-13 08:12:33,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:12:33,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 105 conjunts are in the unsatisfiable core [2021-10-13 08:12:33,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 303 proven. 15001 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-10-13 08:12:35,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 0 proven. 15304 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-10-13 08:12:46,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:12:46,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127288244] [2021-10-13 08:12:46,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127288244] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:46,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1332202901] [2021-10-13 08:12:46,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:12:46,656 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:12:46,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:12:46,656 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:12:46,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-10-13 08:12:50,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 102 check-sat command(s) [2021-10-13 08:12:50,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:12:50,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 105 conjunts are in the unsatisfiable core [2021-10-13 08:12:50,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 303 proven. 15001 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-10-13 08:12:51,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 0 proven. 15304 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-10-13 08:12:54,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1332202901] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:54,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923636231] [2021-10-13 08:12:54,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:12:54,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:12:54,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:12:54,769 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:12:54,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-13 08:12:58,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 102 check-sat command(s) [2021-10-13 08:12:58,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:12:58,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 105 conjunts are in the unsatisfiable core [2021-10-13 08:12:58,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 303 proven. 15001 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-10-13 08:12:59,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:13:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 0 proven. 15304 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-10-13 08:13:02,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923636231] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:13:02,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:13:02,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 56, 54, 56, 54, 56] total 108 [2021-10-13 08:13:02,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023930573] [2021-10-13 08:13:02,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-10-13 08:13:02,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:13:02,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-10-13 08:13:02,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2968, Invalid=8588, Unknown=0, NotChecked=0, Total=11556 [2021-10-13 08:13:02,873 INFO L87 Difference]: Start difference. First operand 3328 states and 3673 transitions. Second operand has 108 states, 108 states have (on average 3.888888888888889) internal successors, (420), 108 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:05,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:13:05,338 INFO L93 Difference]: Finished difference Result 3328 states and 3673 transitions. [2021-10-13 08:13:05,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-13 08:13:05,339 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 3.888888888888889) internal successors, (420), 108 states have internal predecessors, (420), 0 states have call successors, (0), 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 311 [2021-10-13 08:13:05,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:13:05,340 INFO L225 Difference]: With dead ends: 3328 [2021-10-13 08:13:05,340 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 08:13:05,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1860 GetRequests, 1754 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 9404.4ms TimeCoverageRelationStatistics Valid=2968, Invalid=8588, Unknown=0, NotChecked=0, Total=11556 [2021-10-13 08:13:05,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 08:13:05,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 08:13:05,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:05,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 08:13:05,346 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 311 [2021-10-13 08:13:05,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:13:05,347 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 08:13:05,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 3.888888888888889) internal successors, (420), 108 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:05,347 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 08:13:05,348 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 08:13:05,350 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:13:05,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-13 08:13:05,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-10-13 08:13:05,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-10-13 08:13:05,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:13:05,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 08:13:05,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:13:06,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:13:06,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:13:22,246 WARN L207 SmtUtils]: Spent 12.14 s on a formula simplification. DAG size of input: 969 DAG size of output: 357 [2021-10-13 08:13:22,252 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 08:13:22,252 INFO L857 garLoopResultBuilder]: For program point L29(lines 29 33) no Hoare annotation was computed. [2021-10-13 08:13:22,252 INFO L857 garLoopResultBuilder]: For program point L29-2(lines 28 36) no Hoare annotation was computed. [2021-10-13 08:13:22,252 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-13 08:13:22,253 INFO L860 garLoopResultBuilder]: At program point L38(lines 24 39) the Hoare annotation is: true [2021-10-13 08:13:22,253 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 08:13:22,253 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 08:13:22,253 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 08:13:22,254 INFO L853 garLoopResultBuilder]: At program point L28-2(lines 28 36) the Hoare annotation is: (let ((.cse9 (= (_ bv8 32) ULTIMATE.start_main_~y~0)) (.cse13 (= ULTIMATE.start_main_~y~0 (_ bv37 32))) (.cse8 (= (_ bv34 32) ULTIMATE.start_main_~y~0)) (.cse17 (= (_ bv39 32) ULTIMATE.start_main_~y~0)) (.cse23 (= (_ bv41 32) ULTIMATE.start_main_~y~0)) (.cse7 (= (_ bv33 32) ULTIMATE.start_main_~y~0)) (.cse2 (= ULTIMATE.start_main_~y~0 (_ bv21 32))) (.cse21 (= (_ bv48 32) ULTIMATE.start_main_~y~0)) (.cse30 (= (_ bv22 32) ULTIMATE.start_main_~y~0)) (.cse15 (= (_ bv29 32) ULTIMATE.start_main_~y~0)) (.cse26 (= (_ bv49 32) ULTIMATE.start_main_~y~0)) (.cse19 (= ULTIMATE.start_main_~y~0 (_ bv1 32))) (.cse25 (= ULTIMATE.start_main_~y~0 (_ bv32 32))) (.cse40 (= (_ bv36 32) ULTIMATE.start_main_~y~0)) (.cse32 (= ULTIMATE.start_main_~y~0 (_ bv30 32))) (.cse20 (= (_ bv35 32) ULTIMATE.start_main_~y~0)) (.cse4 (= (_ bv11 32) ULTIMATE.start_main_~y~0)) (.cse37 (= ULTIMATE.start_main_~y~0 (_ bv10 32))) (.cse27 (= (_ bv3 32) ULTIMATE.start_main_~y~0)) (.cse36 (= ULTIMATE.start_main_~y~0 (_ bv15 32))) (.cse14 (= (_ bv16 32) ULTIMATE.start_main_~y~0)) (.cse5 (= ULTIMATE.start_main_~y~0 (_ bv19 32))) (.cse18 (= (_ bv4 32) ULTIMATE.start_main_~y~0)) (.cse24 (= (_ bv17 32) ULTIMATE.start_main_~y~0)) (.cse1 (= (_ bv26 32) ULTIMATE.start_main_~y~0)) (.cse10 (= ULTIMATE.start_main_~y~0 (_ bv7 32))) (.cse42 (= ULTIMATE.start_main_~y~0 (_ bv5 32))) (.cse0 (= (_ bv18 32) ULTIMATE.start_main_~y~0)) (.cse41 (= (_ bv6 32) ULTIMATE.start_main_~y~0)) (.cse38 (= (_ bv25 32) ULTIMATE.start_main_~y~0)) (.cse34 (= ULTIMATE.start_main_~y~0 (_ bv46 32))) (.cse46 (= ULTIMATE.start_main_~y~0 (_ bv13 32))) (.cse45 (= ULTIMATE.start_main_~y~0 (_ bv45 32))) (.cse6 (= (_ bv27 32) ULTIMATE.start_main_~y~0)) (.cse43 (= ULTIMATE.start_main_~y~0 (_ bv42 32))) (.cse47 (= ULTIMATE.start_main_~y~0 (_ bv20 32))) (.cse31 (= (_ bv14 32) ULTIMATE.start_main_~y~0)) (.cse48 (= ULTIMATE.start_main_~y~0 (_ bv12 32))) (.cse11 (= ULTIMATE.start_main_~y~0 (_ bv43 32))) (.cse22 (= (_ bv28 32) ULTIMATE.start_main_~y~0)) (.cse28 (= ULTIMATE.start_main_~y~0 (_ bv40 32))) (.cse35 (= ULTIMATE.start_main_~y~0 (_ bv44 32))) (.cse44 (= ULTIMATE.start_main_~y~0 (_ bv0 32))) (.cse16 (= ULTIMATE.start_main_~y~0 (_ bv47 32))) (.cse39 (= (_ bv31 32) ULTIMATE.start_main_~y~0)) (.cse29 (= ULTIMATE.start_main_~y~0 (_ bv24 32))) (.cse33 (= (_ bv2 32) ULTIMATE.start_main_~y~0)) (.cse49 (= ULTIMATE.start_main_~y~0 (_ bv9 32))) (.cse12 (= (_ bv23 32) ULTIMATE.start_main_~y~0)) (.cse3 (= ULTIMATE.start_main_~y~0 (_ bv38 32)))) (or (and .cse0 (= (_ bv82 32) ULTIMATE.start_main_~x~0)) (and (= (_ bv74 32) ULTIMATE.start_main_~x~0) .cse1) (and (= ULTIMATE.start_main_~x~0 (_ bv21 32)) .cse2) (and (= ULTIMATE.start_main_~x~0 (_ bv38 32)) .cse3) (and .cse4 (= (_ bv11 32) ULTIMATE.start_main_~x~0)) (and .cse5 (= ULTIMATE.start_main_~x~0 (_ bv81 32))) (and (= (_ bv27 32) ULTIMATE.start_main_~x~0) .cse6) (and (= (_ bv67 32) ULTIMATE.start_main_~x~0) .cse7) (and (= (_ bv66 32) ULTIMATE.start_main_~x~0) .cse8) (and (= ULTIMATE.start_main_~x~0 (_ bv92 32)) .cse9) (and (= ULTIMATE.start_main_~x~0 (_ bv93 32)) .cse10) (and (= ULTIMATE.start_main_~x~0 (_ bv57 32)) .cse11) (and (= (_ bv23 32) ULTIMATE.start_main_~x~0) .cse12) (and .cse9 (= (_ bv8 32) ULTIMATE.start_main_~x~0)) (and (= ULTIMATE.start_main_~x~0 (_ bv37 32)) .cse13) (and (= (_ bv16 32) ULTIMATE.start_main_~x~0) .cse14) (and (= (_ bv29 32) ULTIMATE.start_main_~x~0) .cse15) (and (= ULTIMATE.start_main_~x~0 (_ bv47 32)) .cse16) (and .cse13 (= ULTIMATE.start_main_~x~0 (_ bv63 32))) (and .cse17 (= ULTIMATE.start_main_~x~0 (_ bv61 32))) (and (= (_ bv4 32) ULTIMATE.start_main_~x~0) .cse18) (and (= ULTIMATE.start_main_~x~0 (_ bv1 32)) .cse19) (and .cse20 (= ULTIMATE.start_main_~x~0 (_ bv65 32))) (and (= (_ bv48 32) ULTIMATE.start_main_~x~0) .cse21) (and .cse22 (= (_ bv28 32) ULTIMATE.start_main_~x~0)) (and .cse8 (= (_ bv34 32) ULTIMATE.start_main_~x~0)) (and .cse23 (= (_ bv59 32) ULTIMATE.start_main_~x~0)) (and (= (_ bv39 32) ULTIMATE.start_main_~x~0) .cse17) (and (= (_ bv41 32) ULTIMATE.start_main_~x~0) .cse23) (and .cse24 (= (_ bv17 32) ULTIMATE.start_main_~x~0)) (and .cse25 (= ULTIMATE.start_main_~x~0 (_ bv32 32))) (and .cse7 (= (_ bv33 32) ULTIMATE.start_main_~x~0)) (and (= (_ bv49 32) ULTIMATE.start_main_~x~0) .cse26) (and .cse27 (= (_ bv3 32) ULTIMATE.start_main_~x~0)) (and .cse28 (= ULTIMATE.start_main_~x~0 (_ bv40 32))) (and .cse2 (= (_ bv79 32) ULTIMATE.start_main_~x~0)) (and (= ULTIMATE.start_main_~x~0 (_ bv24 32)) .cse29) (and (= (_ bv78 32) ULTIMATE.start_main_~x~0) .cse30) (and .cse31 (= (_ bv86 32) ULTIMATE.start_main_~x~0)) (and .cse32 (= (_ bv70 32) ULTIMATE.start_main_~x~0)) (and .cse21 (= ULTIMATE.start_main_~x~0 (_ bv52 32))) (and .cse33 (= (_ bv98 32) ULTIMATE.start_main_~x~0)) (and (= ULTIMATE.start_main_~x~0 (_ bv54 32)) .cse34) (and (= (_ bv22 32) ULTIMATE.start_main_~x~0) .cse30) (and .cse35 (= ULTIMATE.start_main_~x~0 (_ bv44 32))) (and (= ULTIMATE.start_main_~x~0 (_ bv71 32)) .cse15) (and (= (_ bv85 32) ULTIMATE.start_main_~x~0) .cse36) (and (= ULTIMATE.start_main_~x~0 (_ bv51 32)) .cse26) (and (= ULTIMATE.start_main_~x~0 (_ bv10 32)) .cse37) (and (= (_ bv99 32) ULTIMATE.start_main_~x~0) .cse19) (and .cse38 (= (_ bv75 32) ULTIMATE.start_main_~x~0)) (and (= ULTIMATE.start_main_~x~0 (_ bv69 32)) .cse39) (and (= (_ bv36 32) ULTIMATE.start_main_~x~0) .cse40) (and (= ULTIMATE.start_main_~x~0 (_ bv68 32)) .cse25) (and (= ULTIMATE.start_main_~x~0 (_ bv64 32)) .cse40) (and .cse32 (= ULTIMATE.start_main_~x~0 (_ bv30 32))) (and .cse20 (= (_ bv35 32) ULTIMATE.start_main_~x~0)) (and (= (_ bv89 32) ULTIMATE.start_main_~x~0) .cse4) (and (= (_ bv90 32) ULTIMATE.start_main_~x~0) .cse37) (and .cse27 (= (_ bv97 32) ULTIMATE.start_main_~x~0)) (and (= (_ bv94 32) ULTIMATE.start_main_~x~0) .cse41) (and (= ULTIMATE.start_main_~x~0 (_ bv15 32)) .cse36) (and .cse42 (= ULTIMATE.start_main_~x~0 (_ bv5 32))) (and .cse43 (= ULTIMATE.start_main_~x~0 (_ bv42 32))) (and (= (_ bv84 32) ULTIMATE.start_main_~x~0) .cse14) (and .cse5 (= ULTIMATE.start_main_~x~0 (_ bv19 32))) (and .cse44 (= ULTIMATE.start_main_~x~0 (_ bv0 32))) (and (= (_ bv96 32) ULTIMATE.start_main_~x~0) .cse18) (and .cse24 (= (_ bv83 32) ULTIMATE.start_main_~x~0)) (and (= (_ bv26 32) ULTIMATE.start_main_~x~0) .cse1) (and .cse10 (= ULTIMATE.start_main_~x~0 (_ bv7 32))) (and (= ULTIMATE.start_main_~x~0 (_ bv45 32)) .cse45) (and (= (_ bv95 32) ULTIMATE.start_main_~x~0) .cse42) (and (= (_ bv18 32) ULTIMATE.start_main_~x~0) .cse0) (and (= ULTIMATE.start_main_~x~0 (_ bv13 32)) .cse46) (and (= (_ bv6 32) ULTIMATE.start_main_~x~0) .cse41) (and (= ULTIMATE.start_main_~x~0 (_ bv20 32)) .cse47) (and (= (_ bv25 32) ULTIMATE.start_main_~x~0) .cse38) (and (= ULTIMATE.start_main_~x~0 (_ bv46 32)) .cse34) (and (= ULTIMATE.start_main_~x~0 (_ bv87 32)) .cse46) (and (= (_ bv55 32) ULTIMATE.start_main_~x~0) .cse45) (and (= (_ bv88 32) ULTIMATE.start_main_~x~0) .cse48) (and .cse6 (= ULTIMATE.start_main_~x~0 (_ bv73 32))) (and (= (_ bv58 32) ULTIMATE.start_main_~x~0) .cse43) (and (= (_ bv80 32) ULTIMATE.start_main_~x~0) .cse47) (and .cse31 (= (_ bv14 32) ULTIMATE.start_main_~x~0)) (and (= ULTIMATE.start_main_~x~0 (_ bv12 32)) .cse48) (and .cse11 (= ULTIMATE.start_main_~x~0 (_ bv43 32))) (and (= (_ bv72 32) ULTIMATE.start_main_~x~0) .cse22) (and (= (_ bv60 32) ULTIMATE.start_main_~x~0) .cse28) (and .cse35 (= (_ bv56 32) ULTIMATE.start_main_~x~0)) (and .cse44 (= (_ bv100 32) ULTIMATE.start_main_~x~0)) (and (= (_ bv53 32) ULTIMATE.start_main_~x~0) .cse16) (and .cse49 (= (_ bv91 32) ULTIMATE.start_main_~x~0)) (and (= (_ bv31 32) ULTIMATE.start_main_~x~0) .cse39) (and .cse29 (= (_ bv76 32) ULTIMATE.start_main_~x~0)) (and (= ULTIMATE.start_main_~x~0 (_ bv50 32)) (= ULTIMATE.start_main_~y~0 (_ bv50 32))) (and .cse33 (= (_ bv2 32) ULTIMATE.start_main_~x~0)) (and (= ULTIMATE.start_main_~x~0 (_ bv9 32)) .cse49) (and (= ULTIMATE.start_main_~x~0 (_ bv77 32)) .cse12) (and (= (_ bv62 32) ULTIMATE.start_main_~x~0) .cse3))) [2021-10-13 08:13:22,255 INFO L857 garLoopResultBuilder]: For program point L28-3(lines 28 36) no Hoare annotation was computed. [2021-10-13 08:13:22,255 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-13 08:13:22,255 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-10-13 08:13:22,255 INFO L860 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-10-13 08:13:22,260 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:13:22,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:13:22 BoogieIcfgContainer [2021-10-13 08:13:22,316 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:13:22,316 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:13:22,316 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:13:22,317 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:13:22,317 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:01:16" (3/4) ... [2021-10-13 08:13:22,325 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 08:13:22,344 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-13 08:13:22,345 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 08:13:22,346 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 08:13:22,346 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 08:13:22,393 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 08:13:22,393 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:13:22,395 INFO L168 Benchmark]: Toolchain (without parser) took 726657.28 ms. Allocated memory was 48.2 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 23.6 MB in the beginning and 901.8 MB in the end (delta: -878.2 MB). Peak memory consumption was 661.9 MB. Max. memory is 16.1 GB. [2021-10-13 08:13:22,395 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 48.2 MB. Free memory was 29.1 MB in the beginning and 29.1 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:13:22,396 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.15 ms. Allocated memory is still 48.2 MB. Free memory was 23.4 MB in the beginning and 24.8 MB in the end (delta: -1.5 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:13:22,397 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.89 ms. Allocated memory is still 48.2 MB. Free memory was 24.8 MB in the beginning and 23.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:13:22,397 INFO L168 Benchmark]: Boogie Preprocessor took 23.86 ms. Allocated memory is still 48.2 MB. Free memory was 23.3 MB in the beginning and 22.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:13:22,398 INFO L168 Benchmark]: RCFGBuilder took 294.52 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 22.2 MB in the beginning and 35.3 MB in the end (delta: -13.1 MB). Peak memory consumption was 2.9 MB. Max. memory is 16.1 GB. [2021-10-13 08:13:22,398 INFO L168 Benchmark]: TraceAbstraction took 725943.17 ms. Allocated memory was 58.7 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 34.9 MB in the beginning and 905.0 MB in the end (delta: -870.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. [2021-10-13 08:13:22,399 INFO L168 Benchmark]: Witness Printer took 77.27 ms. Allocated memory is still 1.6 GB. Free memory was 905.0 MB in the beginning and 901.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:13:22,401 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 48.2 MB. Free memory was 29.1 MB in the beginning and 29.1 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 257.15 ms. Allocated memory is still 48.2 MB. Free memory was 23.4 MB in the beginning and 24.8 MB in the end (delta: -1.5 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.89 ms. Allocated memory is still 48.2 MB. Free memory was 24.8 MB in the beginning and 23.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.86 ms. Allocated memory is still 48.2 MB. Free memory was 23.3 MB in the beginning and 22.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 294.52 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 22.2 MB in the beginning and 35.3 MB in the end (delta: -13.1 MB). Peak memory consumption was 2.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 725943.17 ms. Allocated memory was 58.7 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 34.9 MB in the beginning and 905.0 MB in the end (delta: -870.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. * Witness Printer took 77.27 ms. Allocated memory is still 1.6 GB. Free memory was 905.0 MB in the beginning and 901.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 725811.4ms, OverallIterations: 16, TraceHistogramMax: 102, EmptinessCheckTime: 40.7ms, AutomataDifference: 529932.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 16274.3ms, InitialAbstractionConstructionTime: 9.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 490 SDtfs, 6244 SDslu, 30115 SDs, 0 SdLazy, 60398 SolverSat, 7751 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 30373.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8773 GetRequests, 7160 SyntacticMatches, 0 SemanticMatches, 1613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90014 ImplicationChecksByTransitivity, 575781.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3328occurred in iteration=14, InterpolantAutomatonStates: 938, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3098.6ms AutomataMinimizationTime, 16 MinimizatonAttempts, 35942 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 106 NumberOfFragments, 710 HoareAnnotationTreeSize, 3 FomulaSimplifications, 164920 FormulaSimplificationTreeSizeReduction, 4108.6ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 104250 FormulaSimplificationTreeSizeReductionInter, 12151.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 538.5ms SsaConstructionTime, 7901.3ms SatisfiabilityAnalysisTime, 130786.8ms InterpolantComputationTime, 4087 NumberOfCodeBlocks, 3988 NumberOfCodeBlocksAsserted, 594 NumberOfCheckSat, 8090 ConstructedInterpolants, 0 QuantifiedInterpolants, 44099 SizeOfPredicates, 35 NumberOfNonLiveVariables, 7221 ConjunctsInSsa, 1264 ConjunctsInUnsatCore, 84 InterpolantComputations, 6 PerfectInterpolantSequences, 20910/249678 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((18bv32 == y && 82bv32 == x) || (74bv32 == x && 26bv32 == y)) || (x == 21bv32 && y == 21bv32)) || (x == 38bv32 && y == 38bv32)) || (11bv32 == y && 11bv32 == x)) || (y == 19bv32 && x == 81bv32)) || (27bv32 == x && 27bv32 == y)) || (67bv32 == x && 33bv32 == y)) || (66bv32 == x && 34bv32 == y)) || (x == 92bv32 && 8bv32 == y)) || (x == 93bv32 && y == 7bv32)) || (x == 57bv32 && y == 43bv32)) || (23bv32 == x && 23bv32 == y)) || (8bv32 == y && 8bv32 == x)) || (x == 37bv32 && y == 37bv32)) || (16bv32 == x && 16bv32 == y)) || (29bv32 == x && 29bv32 == y)) || (x == 47bv32 && y == 47bv32)) || (y == 37bv32 && x == 63bv32)) || (39bv32 == y && x == 61bv32)) || (4bv32 == x && 4bv32 == y)) || (x == 1bv32 && y == 1bv32)) || (35bv32 == y && x == 65bv32)) || (48bv32 == x && 48bv32 == y)) || (28bv32 == y && 28bv32 == x)) || (34bv32 == y && 34bv32 == x)) || (41bv32 == y && 59bv32 == x)) || (39bv32 == x && 39bv32 == y)) || (41bv32 == x && 41bv32 == y)) || (17bv32 == y && 17bv32 == x)) || (y == 32bv32 && x == 32bv32)) || (33bv32 == y && 33bv32 == x)) || (49bv32 == x && 49bv32 == y)) || (3bv32 == y && 3bv32 == x)) || (y == 40bv32 && x == 40bv32)) || (y == 21bv32 && 79bv32 == x)) || (x == 24bv32 && y == 24bv32)) || (78bv32 == x && 22bv32 == y)) || (14bv32 == y && 86bv32 == x)) || (y == 30bv32 && 70bv32 == x)) || (48bv32 == y && x == 52bv32)) || (2bv32 == y && 98bv32 == x)) || (x == 54bv32 && y == 46bv32)) || (22bv32 == x && 22bv32 == y)) || (y == 44bv32 && x == 44bv32)) || (x == 71bv32 && 29bv32 == y)) || (85bv32 == x && y == 15bv32)) || (x == 51bv32 && 49bv32 == y)) || (x == 10bv32 && y == 10bv32)) || (99bv32 == x && y == 1bv32)) || (25bv32 == y && 75bv32 == x)) || (x == 69bv32 && 31bv32 == y)) || (36bv32 == x && 36bv32 == y)) || (x == 68bv32 && y == 32bv32)) || (x == 64bv32 && 36bv32 == y)) || (y == 30bv32 && x == 30bv32)) || (35bv32 == y && 35bv32 == x)) || (89bv32 == x && 11bv32 == y)) || (90bv32 == x && y == 10bv32)) || (3bv32 == y && 97bv32 == x)) || (94bv32 == x && 6bv32 == y)) || (x == 15bv32 && y == 15bv32)) || (y == 5bv32 && x == 5bv32)) || (y == 42bv32 && x == 42bv32)) || (84bv32 == x && 16bv32 == y)) || (y == 19bv32 && x == 19bv32)) || (y == 0bv32 && x == 0bv32)) || (96bv32 == x && 4bv32 == y)) || (17bv32 == y && 83bv32 == x)) || (26bv32 == x && 26bv32 == y)) || (y == 7bv32 && x == 7bv32)) || (x == 45bv32 && y == 45bv32)) || (95bv32 == x && y == 5bv32)) || (18bv32 == x && 18bv32 == y)) || (x == 13bv32 && y == 13bv32)) || (6bv32 == x && 6bv32 == y)) || (x == 20bv32 && y == 20bv32)) || (25bv32 == x && 25bv32 == y)) || (x == 46bv32 && y == 46bv32)) || (x == 87bv32 && y == 13bv32)) || (55bv32 == x && y == 45bv32)) || (88bv32 == x && y == 12bv32)) || (27bv32 == y && x == 73bv32)) || (58bv32 == x && y == 42bv32)) || (80bv32 == x && y == 20bv32)) || (14bv32 == y && 14bv32 == x)) || (x == 12bv32 && y == 12bv32)) || (y == 43bv32 && x == 43bv32)) || (72bv32 == x && 28bv32 == y)) || (60bv32 == x && y == 40bv32)) || (y == 44bv32 && 56bv32 == x)) || (y == 0bv32 && 100bv32 == x)) || (53bv32 == x && y == 47bv32)) || (y == 9bv32 && 91bv32 == x)) || (31bv32 == x && 31bv32 == y)) || (y == 24bv32 && 76bv32 == x)) || (x == 50bv32 && y == 50bv32)) || (2bv32 == y && 2bv32 == x)) || (x == 9bv32 && y == 9bv32)) || (x == 77bv32 && 23bv32 == y)) || (62bv32 == x && y == 38bv32) RESULT: Ultimate proved your program to be correct! [2021-10-13 08:13:22,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaec5daf-b1fe-4dde-98cb-61f26b7e673c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...