./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 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-lit/gr2006.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs --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_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-lit/gr2006.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs --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-5709675 [2021-10-16 02:26:11,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:26:11,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:26:11,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:26:11,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:26:11,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:26:11,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:26:11,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:26:11,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:26:11,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:26:11,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:26:11,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:26:11,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:26:11,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:26:11,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:26:11,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:26:11,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:26:11,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:26:11,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:26:11,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:26:11,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:26:11,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:26:11,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:26:11,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:26:11,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:26:11,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:26:11,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:26:11,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:26:11,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:26:11,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:26:11,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:26:11,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:26:11,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:26:11,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:26:11,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:26:11,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:26:11,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:26:11,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:26:11,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:26:11,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:26:11,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:26:11,736 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:26:11,779 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:26:11,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:26:11,781 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:26:11,781 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:26:11,781 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:26:11,781 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:26:11,781 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:26:11,782 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:26:11,788 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:26:11,788 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:26:11,789 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:26:11,789 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:26:11,789 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:26:11,790 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:26:11,790 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:26:11,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:26:11,791 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:26:11,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:26:11,791 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:26:11,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:26:11,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:26:11,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:26:11,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:26:11,792 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:26:11,792 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:26:11,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:26:11,793 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:26:11,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:26:11,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:26:11,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:26:11,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:26:11,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:26:11,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:26:11,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:26:11,796 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:26:11,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:26:11,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:26:11,796 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:26:11,796 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:26:11,797 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_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5710d6b4e91b9251f64aef4f8b0515c8f0428d2 [2021-10-16 02:26:12,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:26:12,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:26:12,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:26:12,068 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:26:12,068 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:26:12,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-lit/gr2006.i [2021-10-16 02:26:12,137 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/data/37338fc59/d791d115e99147008eacba5428769f8d/FLAG0b272419d [2021-10-16 02:26:12,557 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:26:12,558 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/sv-benchmarks/c/loop-lit/gr2006.i [2021-10-16 02:26:12,562 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/data/37338fc59/d791d115e99147008eacba5428769f8d/FLAG0b272419d [2021-10-16 02:26:12,954 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/data/37338fc59/d791d115e99147008eacba5428769f8d [2021-10-16 02:26:12,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:26:12,958 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:26:12,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:26:12,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:26:12,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:26:12,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:26:12" (1/1) ... [2021-10-16 02:26:12,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f1576ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:12, skipping insertion in model container [2021-10-16 02:26:12,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:26:12" (1/1) ... [2021-10-16 02:26:12,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:26:12,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:26:13,172 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_39325c12-e6c3-4db2-82c3-7efbddfdda26/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2021-10-16 02:26:13,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:26:13,189 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:26:13,202 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_39325c12-e6c3-4db2-82c3-7efbddfdda26/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2021-10-16 02:26:13,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:26:13,218 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:26:13,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:13 WrapperNode [2021-10-16 02:26:13,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:26:13,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:26:13,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:26:13,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:26:13,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:13" (1/1) ... [2021-10-16 02:26:13,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:13" (1/1) ... [2021-10-16 02:26:13,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:26:13,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:26:13,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:26:13,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:26:13,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:13" (1/1) ... [2021-10-16 02:26:13,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:13" (1/1) ... [2021-10-16 02:26:13,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:13" (1/1) ... [2021-10-16 02:26:13,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:13" (1/1) ... [2021-10-16 02:26:13,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:13" (1/1) ... [2021-10-16 02:26:13,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:13" (1/1) ... [2021-10-16 02:26:13,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:13" (1/1) ... [2021-10-16 02:26:13,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:26:13,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:26:13,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:26:13,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:26:13,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:13" (1/1) ... [2021-10-16 02:26:13,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:26:13,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:26:13,308 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:26:13,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:26:13,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:26:13,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:26:13,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:26:13,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:26:13,643 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:26:13,643 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:26:13,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:26:13 BoogieIcfgContainer [2021-10-16 02:26:13,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:26:13,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:26:13,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:26:13,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:26:13,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:26:12" (1/3) ... [2021-10-16 02:26:13,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c0c04a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:26:13, skipping insertion in model container [2021-10-16 02:26:13,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:13" (2/3) ... [2021-10-16 02:26:13,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c0c04a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:26:13, skipping insertion in model container [2021-10-16 02:26:13,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:26:13" (3/3) ... [2021-10-16 02:26:13,654 INFO L111 eAbstractionObserver]: Analyzing ICFG gr2006.i [2021-10-16 02:26:13,660 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:26:13,660 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:26:13,727 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:26:13,734 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 [2021-10-16 02:26:13,735 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:26:13,748 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) [2021-10-16 02:26:13,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:26:13,754 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:26:13,754 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:26:13,755 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:26:13,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:26:13,761 INFO L82 PathProgramCache]: Analyzing trace with hash 68813335, now seen corresponding path program 1 times [2021-10-16 02:26:13,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:26:13,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713854366] [2021-10-16 02:26:13,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:26:13,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:26:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:26:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:13,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:26:13,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713854366] [2021-10-16 02:26:13,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713854366] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:26:13,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:26:13,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:26:13,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915171971] [2021-10-16 02:26:13,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:26:13,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:26:13,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:26:13,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:26:13,930 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) [2021-10-16 02:26:13,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:26:13,945 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-10-16 02:26:13,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:26:13,947 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 [2021-10-16 02:26:13,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:26:13,955 INFO L225 Difference]: With dead ends: 15 [2021-10-16 02:26:13,955 INFO L226 Difference]: Without dead ends: 7 [2021-10-16 02:26:13,959 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 [2021-10-16 02:26:13,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-16 02:26:13,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-16 02:26:13,986 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) [2021-10-16 02:26:13,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-16 02:26:13,989 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-10-16 02:26:13,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:26:13,990 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-16 02:26:13,990 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) [2021-10-16 02:26:13,990 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-16 02:26:13,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:26:13,991 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:26:13,991 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:26:13,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:26:13,993 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:26:13,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:26:13,996 INFO L82 PathProgramCache]: Analyzing trace with hash 2132108204, now seen corresponding path program 1 times [2021-10-16 02:26:13,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:26:13,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492928022] [2021-10-16 02:26:13,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:26:14,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:26:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:26:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:14,112 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:26:14,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492928022] [2021-10-16 02:26:14,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492928022] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:26:14,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:26:14,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:26:14,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345754841] [2021-10-16 02:26:14,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:26:14,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:26:14,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:26:14,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:26:14,116 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) [2021-10-16 02:26:14,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:26:14,151 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-10-16 02:26:14,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:26:14,151 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 [2021-10-16 02:26:14,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:26:14,154 INFO L225 Difference]: With dead ends: 14 [2021-10-16 02:26:14,154 INFO L226 Difference]: Without dead ends: 10 [2021-10-16 02:26:14,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:26:14,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-16 02:26:14,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-10-16 02:26:14,161 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) [2021-10-16 02:26:14,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-16 02:26:14,161 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-10-16 02:26:14,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:26:14,162 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-16 02:26:14,162 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) [2021-10-16 02:26:14,163 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-16 02:26:14,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:26:14,163 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:26:14,163 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-10-16 02:26:14,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:26:14,164 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:26:14,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:26:14,165 INFO L82 PathProgramCache]: Analyzing trace with hash 331117059, now seen corresponding path program 1 times [2021-10-16 02:26:14,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:26:14,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768471621] [2021-10-16 02:26:14,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:26:14,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:26:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:26:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:14,226 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:26:14,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768471621] [2021-10-16 02:26:14,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768471621] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:26:14,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8706457] [2021-10-16 02:26:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:26:14,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:26:14,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:26:14,230 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:26:14,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:26:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:26:14,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:26:14,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:14,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:14,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8706457] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:14,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1042663997] [2021-10-16 02:26:14,611 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-16 02:26:14,612 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:26:14,616 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:26:14,621 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:26:14,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:26:14,653 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:26:14,655 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:26:14,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:26:14,657 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-16 02:26:14,659 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:26:14,660 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:26:14,661 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-16 02:26:14,666 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-10-16 02:26:14,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:26:14,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:26:14,726 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-16 02:26:14,727 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 [2021-10-16 02:26:14,729 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:26:14,732 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 02:26:14,733 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:26:14,735 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 02:26:14,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:26:14,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:26:14,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:26:14,760 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:26:14,771 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-10-16 02:26:14,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:26:14,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:92, output treesize:80 [2021-10-16 02:26:14,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-16 02:26:14,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:26:14,981 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) [2021-10-16 02:26:14,985 INFO L168 Benchmark]: Toolchain (without parser) took 2026.20 ms. Allocated memory was 111.1 MB in the beginning and 136.3 MB in the end (delta: 25.2 MB). Free memory was 74.5 MB in the beginning and 93.6 MB in the end (delta: -19.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:26:14,986 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 111.1 MB. Free memory was 82.5 MB in the beginning and 82.5 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:26:14,986 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.87 ms. Allocated memory is still 111.1 MB. Free memory was 74.2 MB in the beginning and 84.8 MB in the end (delta: -10.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:26:14,987 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.54 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 83.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:26:14,988 INFO L168 Benchmark]: Boogie Preprocessor took 18.94 ms. Allocated memory is still 111.1 MB. Free memory was 83.2 MB in the beginning and 82.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:26:14,988 INFO L168 Benchmark]: RCFGBuilder took 376.90 ms. Allocated memory is still 111.1 MB. Free memory was 82.2 MB in the beginning and 72.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:26:14,989 INFO L168 Benchmark]: TraceAbstraction took 1336.57 ms. Allocated memory was 111.1 MB in the beginning and 136.3 MB in the end (delta: 25.2 MB). Free memory was 71.7 MB in the beginning and 93.6 MB in the end (delta: -21.9 MB). Peak memory consumption was 3.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:26:14,993 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 111.1 MB. Free memory was 82.5 MB in the beginning and 82.5 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 253.87 ms. Allocated memory is still 111.1 MB. Free memory was 74.2 MB in the beginning and 84.8 MB in the end (delta: -10.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.54 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 83.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.94 ms. Allocated memory is still 111.1 MB. Free memory was 83.2 MB in the beginning and 82.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 376.90 ms. Allocated memory is still 111.1 MB. Free memory was 82.2 MB in the beginning and 72.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1336.57 ms. Allocated memory was 111.1 MB in the beginning and 136.3 MB in the end (delta: 25.2 MB). Free memory was 71.7 MB in the beginning and 93.6 MB in the end (delta: -21.9 MB). Peak memory consumption was 3.8 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. [2021-10-16 02:26:15,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:26:17,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:26:17,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:26:17,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:26:17,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:26:17,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:26:17,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:26:17,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:26:17,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:26:17,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:26:17,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:26:17,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:26:17,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:26:17,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:26:17,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:26:17,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:26:17,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:26:17,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:26:17,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:26:17,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:26:17,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:26:17,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:26:17,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:26:17,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:26:17,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:26:17,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:26:17,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:26:17,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:26:17,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:26:17,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:26:17,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:26:17,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:26:17,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:26:17,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:26:17,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:26:17,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:26:17,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:26:17,652 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:26:17,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:26:17,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:26:17,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:26:17,663 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:26:17,705 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:26:17,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:26:17,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:26:17,707 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:26:17,708 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:26:17,708 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:26:17,708 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:26:17,708 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:26:17,709 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:26:17,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:26:17,711 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:26:17,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:26:17,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:26:17,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:26:17,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:26:17,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:26:17,713 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:26:17,713 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:26:17,713 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:26:17,714 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:26:17,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:26:17,714 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:26:17,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:26:17,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:26:17,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:26:17,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:26:17,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:26:17,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:26:17,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:26:17,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:26:17,716 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:26:17,716 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:26:17,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:26:17,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:26:17,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:26:17,717 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_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5710d6b4e91b9251f64aef4f8b0515c8f0428d2 [2021-10-16 02:26:18,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:26:18,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:26:18,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:26:18,136 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:26:18,136 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:26:18,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-lit/gr2006.i [2021-10-16 02:26:18,197 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/data/50a559399/734dd4005ead45f79217e0a976ccf38f/FLAG4c72f896c [2021-10-16 02:26:18,658 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:26:18,659 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/sv-benchmarks/c/loop-lit/gr2006.i [2021-10-16 02:26:18,665 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/data/50a559399/734dd4005ead45f79217e0a976ccf38f/FLAG4c72f896c [2021-10-16 02:26:19,033 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/data/50a559399/734dd4005ead45f79217e0a976ccf38f [2021-10-16 02:26:19,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:26:19,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:26:19,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:26:19,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:26:19,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:26:19,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:26:19" (1/1) ... [2021-10-16 02:26:19,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a0e8b86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:19, skipping insertion in model container [2021-10-16 02:26:19,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:26:19" (1/1) ... [2021-10-16 02:26:19,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:26:19,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:26:19,248 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_39325c12-e6c3-4db2-82c3-7efbddfdda26/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2021-10-16 02:26:19,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:26:19,269 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:26:19,298 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_39325c12-e6c3-4db2-82c3-7efbddfdda26/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2021-10-16 02:26:19,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:26:19,338 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:26:19,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:19 WrapperNode [2021-10-16 02:26:19,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:26:19,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:26:19,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:26:19,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:26:19,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:19" (1/1) ... [2021-10-16 02:26:19,357 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:19" (1/1) ... [2021-10-16 02:26:19,401 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:26:19,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:26:19,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:26:19,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:26:19,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:19" (1/1) ... [2021-10-16 02:26:19,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:19" (1/1) ... [2021-10-16 02:26:19,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:19" (1/1) ... [2021-10-16 02:26:19,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:19" (1/1) ... [2021-10-16 02:26:19,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:19" (1/1) ... [2021-10-16 02:26:19,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:19" (1/1) ... [2021-10-16 02:26:19,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:19" (1/1) ... [2021-10-16 02:26:19,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:26:19,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:26:19,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:26:19,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:26:19,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:19" (1/1) ... [2021-10-16 02:26:19,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:26:19,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:26:19,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:26:19,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:26:19,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:26:19,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:26:19,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:26:19,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:26:19,792 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:26:19,792 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:26:19,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:26:19 BoogieIcfgContainer [2021-10-16 02:26:19,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:26:19,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:26:19,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:26:19,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:26:19,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:26:19" (1/3) ... [2021-10-16 02:26:19,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b586a00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:26:19, skipping insertion in model container [2021-10-16 02:26:19,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:26:19" (2/3) ... [2021-10-16 02:26:19,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b586a00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:26:19, skipping insertion in model container [2021-10-16 02:26:19,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:26:19" (3/3) ... [2021-10-16 02:26:19,802 INFO L111 eAbstractionObserver]: Analyzing ICFG gr2006.i [2021-10-16 02:26:19,807 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:26:19,808 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:26:19,864 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:26:19,871 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 [2021-10-16 02:26:19,871 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:26:19,884 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) [2021-10-16 02:26:19,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:26:19,889 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:26:19,889 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:26:19,890 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:26:19,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:26:19,895 INFO L82 PathProgramCache]: Analyzing trace with hash 890091623, now seen corresponding path program 1 times [2021-10-16 02:26:19,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:26:19,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357548231] [2021-10-16 02:26:19,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:26:19,919 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:26:19,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:26:19,953 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:26:20,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:26:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:26:20,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:26:20,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:20,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:20,093 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:26:20,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357548231] [2021-10-16 02:26:20,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357548231] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:26:20,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:26:20,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:26:20,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489099160] [2021-10-16 02:26:20,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:26:20,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:26:20,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:26:20,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:26:20,118 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) [2021-10-16 02:26:20,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:26:20,131 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2021-10-16 02:26:20,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:26:20,132 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 [2021-10-16 02:26:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:26:20,140 INFO L225 Difference]: With dead ends: 21 [2021-10-16 02:26:20,140 INFO L226 Difference]: Without dead ends: 9 [2021-10-16 02:26:20,143 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 [2021-10-16 02:26:20,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-16 02:26:20,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-16 02:26:20,168 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) [2021-10-16 02:26:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-16 02:26:20,170 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-10-16 02:26:20,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:26:20,170 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-16 02:26:20,171 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) [2021-10-16 02:26:20,171 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-16 02:26:20,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:26:20,172 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:26:20,172 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:26:20,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:20,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:26:20,383 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:26:20,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:26:20,385 INFO L82 PathProgramCache]: Analyzing trace with hash 297871632, now seen corresponding path program 1 times [2021-10-16 02:26:20,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:26:20,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701961172] [2021-10-16 02:26:20,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:26:20,386 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:26:20,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:26:20,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:26:20,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:26:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:26:20,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:26:20,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:20,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:20,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:26:20,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701961172] [2021-10-16 02:26:20,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701961172] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:26:20,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:26:20,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:26:20,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167052586] [2021-10-16 02:26:20,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:26:20,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:26:20,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:26:20,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:26:20,563 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) [2021-10-16 02:26:20,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:26:20,590 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-10-16 02:26:20,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:26:20,591 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 [2021-10-16 02:26:20,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:26:20,592 INFO L225 Difference]: With dead ends: 30 [2021-10-16 02:26:20,592 INFO L226 Difference]: Without dead ends: 23 [2021-10-16 02:26:20,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:26:20,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-16 02:26:20,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2021-10-16 02:26:20,597 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) [2021-10-16 02:26:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-16 02:26:20,598 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-10-16 02:26:20,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:26:20,598 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-16 02:26:20,598 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) [2021-10-16 02:26:20,599 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-16 02:26:20,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:26:20,599 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:26:20,599 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:26:20,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:20,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:26:20,810 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:26:20,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:26:20,814 INFO L82 PathProgramCache]: Analyzing trace with hash 296024590, now seen corresponding path program 1 times [2021-10-16 02:26:20,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:26:20,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095126125] [2021-10-16 02:26:20,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:26:20,815 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:26:20,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:26:20,818 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:26:20,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:26:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:26:20,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:26:20,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:20,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:20,974 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:26:20,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095126125] [2021-10-16 02:26:20,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095126125] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:26:20,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:26:20,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:26:20,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019633035] [2021-10-16 02:26:20,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:26:20,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:26:20,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:26:20,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:26:20,977 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) [2021-10-16 02:26:21,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:26:21,037 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-10-16 02:26:21,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:26:21,038 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 [2021-10-16 02:26:21,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:26:21,039 INFO L225 Difference]: With dead ends: 27 [2021-10-16 02:26:21,039 INFO L226 Difference]: Without dead ends: 23 [2021-10-16 02:26:21,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:26:21,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-16 02:26:21,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2021-10-16 02:26:21,044 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) [2021-10-16 02:26:21,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-10-16 02:26:21,045 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 8 [2021-10-16 02:26:21,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:26:21,046 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-10-16 02:26:21,046 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) [2021-10-16 02:26:21,046 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-10-16 02:26:21,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 02:26:21,047 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:26:21,047 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:26:21,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:21,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:26:21,263 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:26:21,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:26:21,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1527752176, now seen corresponding path program 1 times [2021-10-16 02:26:21,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:26:21,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248054908] [2021-10-16 02:26:21,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:26:21,265 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:26:21,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:26:21,266 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:26:21,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:26:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:26:21,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:26:21,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:21,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:21,534 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:26:21,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248054908] [2021-10-16 02:26:21,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248054908] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:21,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1677469683] [2021-10-16 02:26:21,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:26:21,537 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:26:21,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:26:21,544 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:26:21,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-16 02:26:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:26:21,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:26:21,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:21,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:21,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1677469683] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:21,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046614657] [2021-10-16 02:26:21,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:26:21,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:26:21,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:26:21,782 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:26:21,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-16 02:26:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:26:21,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:26:21,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:21,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:22,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046614657] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:22,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:26:22,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 10 [2021-10-16 02:26:22,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222940926] [2021-10-16 02:26:22,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:26:22,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:26:22,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:26:22,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:26:22,027 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) [2021-10-16 02:26:22,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:26:22,524 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2021-10-16 02:26:22,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 02:26:22,526 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 [2021-10-16 02:26:22,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:26:22,527 INFO L225 Difference]: With dead ends: 54 [2021-10-16 02:26:22,527 INFO L226 Difference]: Without dead ends: 43 [2021-10-16 02:26:22,528 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 402.7ms TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-10-16 02:26:22,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-16 02:26:22,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2021-10-16 02:26:22,541 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) [2021-10-16 02:26:22,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-10-16 02:26:22,543 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 14 [2021-10-16 02:26:22,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:26:22,544 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-10-16 02:26:22,544 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) [2021-10-16 02:26:22,545 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-10-16 02:26:22,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 02:26:22,550 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:26:22,551 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-10-16 02:26:22,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:22,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:22,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:23,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:26:23,159 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:26:23,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:26:23,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1637401627, now seen corresponding path program 1 times [2021-10-16 02:26:23,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:26:23,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489461719] [2021-10-16 02:26:23,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:26:23,160 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:26:23,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:26:23,164 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:26:23,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:26:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:26:23,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:26:23,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:23,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:23,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:23,561 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:26:23,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489461719] [2021-10-16 02:26:23,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489461719] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:23,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1410498585] [2021-10-16 02:26:23,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:26:23,562 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:26:23,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:26:23,567 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:26:23,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-16 02:26:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:26:23,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:26:23,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:23,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:23,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1410498585] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:23,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420850825] [2021-10-16 02:26:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:26:23,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:26:23,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:26:23,855 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:26:23,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-16 02:26:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:26:23,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:26:23,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:24,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:24,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420850825] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:24,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:26:24,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 8] total 16 [2021-10-16 02:26:24,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379736511] [2021-10-16 02:26:24,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-16 02:26:24,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:26:24,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-16 02:26:24,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:26:24,295 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) [2021-10-16 02:26:24,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:26:24,786 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2021-10-16 02:26:24,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 02:26:24,787 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 [2021-10-16 02:26:24,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:26:24,788 INFO L225 Difference]: With dead ends: 63 [2021-10-16 02:26:24,788 INFO L226 Difference]: Without dead ends: 59 [2021-10-16 02:26:24,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 547.3ms TimeCoverageRelationStatistics Valid=204, Invalid=348, Unknown=0, NotChecked=0, Total=552 [2021-10-16 02:26:24,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-16 02:26:24,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-10-16 02:26:24,804 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) [2021-10-16 02:26:24,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2021-10-16 02:26:24,807 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 17 [2021-10-16 02:26:24,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:26:24,807 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2021-10-16 02:26:24,807 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) [2021-10-16 02:26:24,808 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2021-10-16 02:26:24,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-16 02:26:24,809 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:26:24,809 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 6, 2, 1, 1, 1, 1, 1, 1] [2021-10-16 02:26:24,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:25,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:25,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:25,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:26:25,424 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:26:25,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:26:25,425 INFO L82 PathProgramCache]: Analyzing trace with hash 184775451, now seen corresponding path program 2 times [2021-10-16 02:26:25,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:26:25,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310002391] [2021-10-16 02:26:25,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:26:25,426 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:26:25,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:26:25,427 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:26:25,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 02:26:25,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:26:25,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:26:25,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:26:25,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:26:25,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:26:25,960 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:26:25,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310002391] [2021-10-16 02:26:25,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310002391] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:25,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1557170198] [2021-10-16 02:26:25,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:26:25,961 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:26:25,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:26:25,963 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:26:25,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-16 02:26:26,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:26:26,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:26:26,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:26:26,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:26:26,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:26:26,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1557170198] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:26,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81529347] [2021-10-16 02:26:26,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:26:26,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:26:26,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:26:26,407 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:26:26,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-16 02:26:26,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:26:26,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:26:26,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:26:26,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:26:26,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:26:27,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81529347] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:27,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:26:27,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 11] total 23 [2021-10-16 02:26:27,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334232942] [2021-10-16 02:26:27,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-16 02:26:27,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:26:27,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-16 02:26:27,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2021-10-16 02:26:27,289 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) [2021-10-16 02:26:28,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:26:28,597 INFO L93 Difference]: Finished difference Result 277 states and 377 transitions. [2021-10-16 02:26:28,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-16 02:26:28,598 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 [2021-10-16 02:26:28,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:26:28,602 INFO L225 Difference]: With dead ends: 277 [2021-10-16 02:26:28,603 INFO L226 Difference]: Without dead ends: 273 [2021-10-16 02:26:28,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1431.1ms TimeCoverageRelationStatistics Valid=512, Invalid=970, Unknown=0, NotChecked=0, Total=1482 [2021-10-16 02:26:28,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-10-16 02:26:28,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 84. [2021-10-16 02:26:28,622 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) [2021-10-16 02:26:28,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2021-10-16 02:26:28,623 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 29 [2021-10-16 02:26:28,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:26:28,623 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2021-10-16 02:26:28,624 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) [2021-10-16 02:26:28,624 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2021-10-16 02:26:28,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-16 02:26:28,625 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:26:28,625 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 7, 3, 1, 1, 1, 1, 1, 1] [2021-10-16 02:26:28,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:28,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:29,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:29,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:26:29,244 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:26:29,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:26:29,244 INFO L82 PathProgramCache]: Analyzing trace with hash -475584579, now seen corresponding path program 3 times [2021-10-16 02:26:29,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:26:29,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370508635] [2021-10-16 02:26:29,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:26:29,245 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:26:29,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:26:29,246 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:26:29,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-16 02:26:29,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-16 02:26:29,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:26:29,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:26:29,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 76 proven. 37 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 02:26:29,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 76 proven. 37 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 02:26:29,920 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:26:29,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370508635] [2021-10-16 02:26:29,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370508635] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:29,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1897151021] [2021-10-16 02:26:29,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:26:29,920 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:26:29,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:26:29,921 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:26:29,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-16 02:26:30,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-16 02:26:30,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:26:30,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:26:30,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 76 proven. 37 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 02:26:30,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 76 proven. 37 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 02:26:30,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1897151021] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:30,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428803575] [2021-10-16 02:26:30,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:26:30,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:26:30,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:26:30,527 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:26:30,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-16 02:26:30,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-16 02:26:30,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:26:30,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:26:30,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 79 proven. 33 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-16 02:26:31,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 76 proven. 37 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 02:26:31,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428803575] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:31,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:26:31,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2021-10-16 02:26:31,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66787304] [2021-10-16 02:26:31,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 02:26:31,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:26:31,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 02:26:31,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:26:31,232 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) [2021-10-16 02:26:31,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:26:31,643 INFO L93 Difference]: Finished difference Result 219 states and 276 transitions. [2021-10-16 02:26:31,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 02:26:31,644 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 [2021-10-16 02:26:31,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:26:31,646 INFO L225 Difference]: With dead ends: 219 [2021-10-16 02:26:31,646 INFO L226 Difference]: Without dead ends: 215 [2021-10-16 02:26:31,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 523.1ms TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2021-10-16 02:26:31,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-10-16 02:26:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 97. [2021-10-16 02:26:31,660 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) [2021-10-16 02:26:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 123 transitions. [2021-10-16 02:26:31,662 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 123 transitions. Word has length 35 [2021-10-16 02:26:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:26:31,662 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 123 transitions. [2021-10-16 02:26:31,662 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) [2021-10-16 02:26:31,663 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 123 transitions. [2021-10-16 02:26:31,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 02:26:31,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:26:31,664 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 7, 4, 1, 1, 1, 1, 1, 1] [2021-10-16 02:26:31,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:31,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-16 02:26:32,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:32,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:26:32,276 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:26:32,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:26:32,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2004788242, now seen corresponding path program 4 times [2021-10-16 02:26:32,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:26:32,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079507154] [2021-10-16 02:26:32,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:26:32,277 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:26:32,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:26:32,278 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:26:32,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-16 02:26:32,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:26:32,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:26:32,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:26:32,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 76 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 02:26:32,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 76 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 02:26:32,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:26:32,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079507154] [2021-10-16 02:26:32,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079507154] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:32,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1816410372] [2021-10-16 02:26:32,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:26:32,936 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:26:32,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:26:32,943 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:26:32,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-16 02:26:33,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:26:33,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:26:33,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:26:33,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 76 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 02:26:33,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 76 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 02:26:33,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1816410372] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:33,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150331038] [2021-10-16 02:26:33,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:26:33,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:26:33,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:26:33,539 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:26:33,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-16 02:26:33,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:26:33,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:26:33,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:26:33,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 76 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 02:26:33,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 76 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 02:26:34,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150331038] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:34,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:26:34,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 11] total 25 [2021-10-16 02:26:34,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933634396] [2021-10-16 02:26:34,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-16 02:26:34,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:26:34,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-16 02:26:34,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-10-16 02:26:34,601 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) [2021-10-16 02:26:35,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:26:35,508 INFO L93 Difference]: Finished difference Result 194 states and 242 transitions. [2021-10-16 02:26:35,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 02:26:35,509 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 [2021-10-16 02:26:35,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:26:35,510 INFO L225 Difference]: With dead ends: 194 [2021-10-16 02:26:35,510 INFO L226 Difference]: Without dead ends: 116 [2021-10-16 02:26:35,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1234.1ms TimeCoverageRelationStatistics Valid=389, Invalid=733, Unknown=0, NotChecked=0, Total=1122 [2021-10-16 02:26:35,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-16 02:26:35,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 89. [2021-10-16 02:26:35,519 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) [2021-10-16 02:26:35,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2021-10-16 02:26:35,521 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 38 [2021-10-16 02:26:35,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:26:35,521 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2021-10-16 02:26:35,521 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) [2021-10-16 02:26:35,522 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2021-10-16 02:26:35,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-16 02:26:35,523 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:26:35,523 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1] [2021-10-16 02:26:35,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:35,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-16 02:26:35,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:36,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:26:36,126 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:26:36,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:26:36,127 INFO L82 PathProgramCache]: Analyzing trace with hash 912896155, now seen corresponding path program 2 times [2021-10-16 02:26:36,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:26:36,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134819035] [2021-10-16 02:26:36,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:26:36,128 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:26:36,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:26:36,129 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:26:36,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-16 02:26:36,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:26:36,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:26:36,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:26:36,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:36,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:37,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:26:37,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134819035] [2021-10-16 02:26:37,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134819035] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:37,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [953767523] [2021-10-16 02:26:37,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:26:37,064 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:26:37,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:26:37,067 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:26:37,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-10-16 02:26:37,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:26:37,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:26:37,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:26:37,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:37,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:37,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [953767523] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:37,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618236504] [2021-10-16 02:26:37,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:26:37,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:26:37,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:26:37,755 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:26:37,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-16 02:26:38,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:26:38,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:26:38,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:26:38,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:38,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:26:39,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618236504] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:39,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:26:39,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15, 16] total 40 [2021-10-16 02:26:39,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383939369] [2021-10-16 02:26:39,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-16 02:26:39,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:26:39,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-16 02:26:39,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=1080, Unknown=0, NotChecked=0, Total=1560 [2021-10-16 02:26:39,303 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) [2021-10-16 02:26:42,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:26:42,317 INFO L93 Difference]: Finished difference Result 574 states and 691 transitions. [2021-10-16 02:26:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-16 02:26:42,318 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 [2021-10-16 02:26:42,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:26:42,322 INFO L225 Difference]: With dead ends: 574 [2021-10-16 02:26:42,322 INFO L226 Difference]: Without dead ends: 570 [2021-10-16 02:26:42,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 3486.1ms TimeCoverageRelationStatistics Valid=1364, Invalid=2668, Unknown=0, NotChecked=0, Total=4032 [2021-10-16 02:26:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-10-16 02:26:42,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 359. [2021-10-16 02:26:42,369 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) [2021-10-16 02:26:42,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 413 transitions. [2021-10-16 02:26:42,373 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 413 transitions. Word has length 41 [2021-10-16 02:26:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:26:42,374 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 413 transitions. [2021-10-16 02:26:42,374 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) [2021-10-16 02:26:42,374 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 413 transitions. [2021-10-16 02:26:42,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-16 02:26:42,377 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:26:42,377 INFO L512 BasicCegarLoop]: trace histogram [20, 19, 16, 4, 1, 1, 1, 1, 1, 1] [2021-10-16 02:26:42,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:42,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:42,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:42,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:26:42,981 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:26:42,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:26:42,981 INFO L82 PathProgramCache]: Analyzing trace with hash -138371429, now seen corresponding path program 5 times [2021-10-16 02:26:42,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:26:42,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525664444] [2021-10-16 02:26:42,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:26:42,982 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:26:42,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:26:42,983 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:26:42,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-16 02:26:43,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-10-16 02:26:43,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:26:43,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:26:43,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 166 proven. 392 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 02:26:43,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 166 proven. 392 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 02:26:45,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:26:45,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525664444] [2021-10-16 02:26:45,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525664444] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:45,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1063141610] [2021-10-16 02:26:45,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:26:45,065 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:26:45,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:26:45,066 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:26:45,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-10-16 02:26:45,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-10-16 02:26:45,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:26:45,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-16 02:26:45,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 166 proven. 392 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 02:26:45,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 166 proven. 392 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 02:26:48,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1063141610] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:48,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839077238] [2021-10-16 02:26:48,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:26:48,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:26:48,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:26:48,003 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:26:48,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-16 02:26:48,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-10-16 02:26:48,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:26:48,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-16 02:26:48,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-16 02:26:49,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 40 proven. 523 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-16 02:26:52,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839077238] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:52,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:26:52,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19, 20, 19, 21] total 89 [2021-10-16 02:26:52,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108629155] [2021-10-16 02:26:52,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-10-16 02:26:52,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:26:52,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-10-16 02:26:52,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=6700, Unknown=0, NotChecked=0, Total=7832 [2021-10-16 02:26:52,911 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) [2021-10-16 02:27:24,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:27:24,387 INFO L93 Difference]: Finished difference Result 731 states and 835 transitions. [2021-10-16 02:27:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-10-16 02:27:24,389 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 [2021-10-16 02:27:24,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:27:24,392 INFO L225 Difference]: With dead ends: 731 [2021-10-16 02:27:24,392 INFO L226 Difference]: Without dead ends: 433 [2021-10-16 02:27:24,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5506 ImplicationChecksByTransitivity, 36601.3ms TimeCoverageRelationStatistics Valid=7649, Invalid=24571, Unknown=0, NotChecked=0, Total=32220 [2021-10-16 02:27:24,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-10-16 02:27:24,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 355. [2021-10-16 02:27:24,440 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) [2021-10-16 02:27:24,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 390 transitions. [2021-10-16 02:27:24,442 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 390 transitions. Word has length 65 [2021-10-16 02:27:24,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:27:24,443 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 390 transitions. [2021-10-16 02:27:24,443 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) [2021-10-16 02:27:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 390 transitions. [2021-10-16 02:27:24,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-16 02:27:24,447 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:27:24,447 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1] [2021-10-16 02:27:24,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-10-16 02:27:24,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-16 02:27:24,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-10-16 02:27:25,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:27:25,051 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:27:25,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:27:25,051 INFO L82 PathProgramCache]: Analyzing trace with hash -708881797, now seen corresponding path program 3 times [2021-10-16 02:27:25,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:27:25,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636130560] [2021-10-16 02:27:25,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:27:25,052 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:27:25,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:27:25,053 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:27:25,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-16 02:27:25,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-10-16 02:27:25,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:27:25,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-16 02:27:25,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:27:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:27:26,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:27:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:27:28,851 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:27:28,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636130560] [2021-10-16 02:27:28,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636130560] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:27:28,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [95695448] [2021-10-16 02:27:28,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:27:28,851 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:27:28,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:27:28,852 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:27:28,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-10-16 02:27:29,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-10-16 02:27:29,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:27:29,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-16 02:27:29,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:27:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:27:29,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:27:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:27:30,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [95695448] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:27:30,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301645925] [2021-10-16 02:27:30,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:27:30,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:27:30,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:27:30,668 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:27:30,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-16 02:27:31,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-10-16 02:27:31,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:27:31,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-16 02:27:31,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:27:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:27:31,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:27:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:27:32,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301645925] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:27:32,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:27:32,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 29, 30, 29, 30] total 57 [2021-10-16 02:27:32,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557423014] [2021-10-16 02:27:32,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-10-16 02:27:32,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:27:32,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-10-16 02:27:32,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=868, Invalid=2324, Unknown=0, NotChecked=0, Total=3192 [2021-10-16 02:27:32,327 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) [2021-10-16 02:27:53,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:27:53,619 INFO L93 Difference]: Finished difference Result 5381 states and 6049 transitions. [2021-10-16 02:27:53,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-10-16 02:27:53,620 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 [2021-10-16 02:27:53,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:27:53,655 INFO L225 Difference]: With dead ends: 5381 [2021-10-16 02:27:53,655 INFO L226 Difference]: Without dead ends: 5377 [2021-10-16 02:27:53,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 21713.0ms TimeCoverageRelationStatistics Valid=4132, Invalid=7640, Unknown=0, NotChecked=0, Total=11772 [2021-10-16 02:27:53,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5377 states. [2021-10-16 02:27:53,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5377 to 1305. [2021-10-16 02:27:53,875 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) [2021-10-16 02:27:53,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 1444 transitions. [2021-10-16 02:27:53,879 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 1444 transitions. Word has length 83 [2021-10-16 02:27:53,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:27:53,880 INFO L470 AbstractCegarLoop]: Abstraction has 1305 states and 1444 transitions. [2021-10-16 02:27:53,880 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) [2021-10-16 02:27:53,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 1444 transitions. [2021-10-16 02:27:53,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-16 02:27:53,883 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:27:53,884 INFO L512 BasicCegarLoop]: trace histogram [39, 38, 34, 5, 1, 1, 1, 1, 1, 1] [2021-10-16 02:27:53,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-16 02:27:54,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-10-16 02:27:54,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-10-16 02:27:54,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:27:54,495 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:27:54,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:27:54,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1584413648, now seen corresponding path program 6 times [2021-10-16 02:27:54,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:27:54,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077601399] [2021-10-16 02:27:54,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-16 02:27:54,496 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:27:54,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:27:54,498 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:27:54,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-16 02:27:55,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-10-16 02:27:55,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:27:55,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:27:55,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:27:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 874 proven. 121 refuted. 0 times theorem prover too weak. 1228 trivial. 0 not checked. [2021-10-16 02:27:55,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:27:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 874 proven. 121 refuted. 0 times theorem prover too weak. 1228 trivial. 0 not checked. [2021-10-16 02:27:56,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:27:56,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077601399] [2021-10-16 02:27:56,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077601399] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:27:56,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1196598103] [2021-10-16 02:27:56,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-16 02:27:56,153 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:27:56,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:27:56,154 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:27:56,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-10-16 02:27:57,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-10-16 02:27:57,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:27:57,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:27:57,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:27:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 874 proven. 121 refuted. 0 times theorem prover too weak. 1228 trivial. 0 not checked. [2021-10-16 02:27:57,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:27:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 874 proven. 121 refuted. 0 times theorem prover too weak. 1228 trivial. 0 not checked. [2021-10-16 02:27:57,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1196598103] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:27:57,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015489649] [2021-10-16 02:27:57,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-16 02:27:57,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:27:57,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:27:57,950 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:27:57,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-16 02:27:58,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-10-16 02:27:58,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:27:58,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:27:58,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:27:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 877 proven. 117 refuted. 0 times theorem prover too weak. 1229 trivial. 0 not checked. [2021-10-16 02:27:59,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:27:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 874 proven. 121 refuted. 0 times theorem prover too weak. 1228 trivial. 0 not checked. [2021-10-16 02:27:59,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015489649] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:27:59,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:27:59,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 20 [2021-10-16 02:27:59,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146577488] [2021-10-16 02:27:59,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-16 02:27:59,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:27:59,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-16 02:27:59,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-10-16 02:27:59,932 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) [2021-10-16 02:28:01,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:28:01,101 INFO L93 Difference]: Finished difference Result 1997 states and 2191 transitions. [2021-10-16 02:28:01,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-16 02:28:01,101 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 [2021-10-16 02:28:01,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:28:01,111 INFO L225 Difference]: With dead ends: 1997 [2021-10-16 02:28:01,112 INFO L226 Difference]: Without dead ends: 1993 [2021-10-16 02:28:01,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1260.1ms TimeCoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2021-10-16 02:28:01,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-10-16 02:28:01,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1362. [2021-10-16 02:28:01,253 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) [2021-10-16 02:28:01,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1519 transitions. [2021-10-16 02:28:01,255 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1519 transitions. Word has length 122 [2021-10-16 02:28:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:28:01,256 INFO L470 AbstractCegarLoop]: Abstraction has 1362 states and 1519 transitions. [2021-10-16 02:28:01,256 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) [2021-10-16 02:28:01,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1519 transitions. [2021-10-16 02:28:01,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-10-16 02:28:01,257 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:28:01,258 INFO L512 BasicCegarLoop]: trace histogram [40, 39, 34, 6, 1, 1, 1, 1, 1, 1] [2021-10-16 02:28:01,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-10-16 02:28:01,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-16 02:28:01,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-16 02:28:01,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:28:01,859 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:28:01,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:28:01,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1756858011, now seen corresponding path program 7 times [2021-10-16 02:28:01,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:28:01,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523250980] [2021-10-16 02:28:01,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-16 02:28:01,860 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:28:01,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:28:01,862 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:28:01,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-16 02:28:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:28:02,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-16 02:28:02,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:28:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 554 proven. 1751 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-16 02:28:03,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:28:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 554 proven. 1751 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-16 02:28:06,573 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:28:06,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523250980] [2021-10-16 02:28:06,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523250980] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:28:06,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [52757431] [2021-10-16 02:28:06,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-16 02:28:06,574 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:28:06,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:28:06,575 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:28:06,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-10-16 02:28:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:28:07,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-16 02:28:07,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:28:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 554 proven. 1751 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-16 02:28:08,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:28:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 554 proven. 1751 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-16 02:28:08,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [52757431] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:28:08,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119464911] [2021-10-16 02:28:08,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-16 02:28:08,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:28:08,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:28:08,740 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:28:08,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-16 02:28:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:28:09,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-16 02:28:09,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:28:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 2324 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-16 02:28:12,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:28:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 88 proven. 2239 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-16 02:28:21,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119464911] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:28:21,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:28:21,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37, 37, 37, 39] total 144 [2021-10-16 02:28:21,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434328884] [2021-10-16 02:28:21,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2021-10-16 02:28:21,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:28:21,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-10-16 02:28:21,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2667, Invalid=17925, Unknown=0, NotChecked=0, Total=20592 [2021-10-16 02:28:21,247 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) [2021-10-16 02:28:55,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:28:55,649 INFO L93 Difference]: Finished difference Result 2982 states and 3277 transitions. [2021-10-16 02:28:55,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-10-16 02:28:55,653 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 [2021-10-16 02:28:55,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:28:55,661 INFO L225 Difference]: With dead ends: 2982 [2021-10-16 02:28:55,661 INFO L226 Difference]: Without dead ends: 1750 [2021-10-16 02:28:55,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 857 GetRequests, 602 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9894 ImplicationChecksByTransitivity, 45081.3ms TimeCoverageRelationStatistics Valid=12986, Invalid=52806, Unknown=0, NotChecked=0, Total=65792 [2021-10-16 02:28:55,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2021-10-16 02:28:55,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1251. [2021-10-16 02:28:55,847 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) [2021-10-16 02:28:55,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1372 transitions. [2021-10-16 02:28:55,851 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1372 transitions. Word has length 125 [2021-10-16 02:28:55,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:28:55,851 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 1372 transitions. [2021-10-16 02:28:55,852 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) [2021-10-16 02:28:55,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1372 transitions. [2021-10-16 02:28:55,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-10-16 02:28:55,854 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:28:55,854 INFO L512 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1, 1, 1, 1] [2021-10-16 02:28:55,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-10-16 02:28:56,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-10-16 02:28:56,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-16 02:28:56,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:28:56,460 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:28:56,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:28:56,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1431277115, now seen corresponding path program 4 times [2021-10-16 02:28:56,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:28:56,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275920524] [2021-10-16 02:28:56,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:28:56,461 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:28:56,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:28:56,462 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:28:56,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-16 02:28:57,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:28:57,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:28:57,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-16 02:28:57,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:28:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 506 proven. 3775 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 02:28:59,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:29:04,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 506 proven. 3775 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 02:29:04,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:29:04,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275920524] [2021-10-16 02:29:04,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275920524] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:29:04,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1066153726] [2021-10-16 02:29:04,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:29:04,813 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:29:04,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:29:04,813 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:29:04,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-10-16 02:29:06,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:29:06,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:29:06,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-16 02:29:06,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:29:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 506 proven. 3775 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 02:29:06,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:29:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 506 proven. 3775 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 02:29:07,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1066153726] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:29:07,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117042354] [2021-10-16 02:29:07,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:29:07,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:29:07,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:29:07,455 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:29:07,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-16 02:29:08,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:29:08,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:29:08,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-16 02:29:08,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:29:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 0 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:14,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:29:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 0 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:31,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117042354] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:29:31,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:29:31,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53, 53, 57, 58] total 215 [2021-10-16 02:29:31,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275746752] [2021-10-16 02:29:31,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 215 states [2021-10-16 02:29:31,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:29:31,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 215 interpolants. [2021-10-16 02:29:31,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4834, Invalid=41176, Unknown=0, NotChecked=0, Total=46010 [2021-10-16 02:29:31,205 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) [2021-10-16 02:35:48,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:48,956 INFO L93 Difference]: Finished difference Result 34553 states and 38306 transitions. [2021-10-16 02:35:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 315 states. [2021-10-16 02:35:48,960 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 [2021-10-16 02:35:48,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:49,097 INFO L225 Difference]: With dead ends: 34553 [2021-10-16 02:35:49,097 INFO L226 Difference]: Without dead ends: 33408 [2021-10-16 02:35:49,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1308 GetRequests, 783 SyntacticMatches, 0 SemanticMatches, 525 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65621 ImplicationChecksByTransitivity, 387610.0ms TimeCoverageRelationStatistics Valid=48485, Invalid=228717, Unknown=0, NotChecked=0, Total=277202 [2021-10-16 02:35:49,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33408 states. [2021-10-16 02:35:50,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33408 to 3328. [2021-10-16 02:35:50,416 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) [2021-10-16 02:35:50,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 3674 transitions. [2021-10-16 02:35:50,424 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 3674 transitions. Word has length 167 [2021-10-16 02:35:50,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:50,424 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 3674 transitions. [2021-10-16 02:35:50,425 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) [2021-10-16 02:35:50,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 3674 transitions. [2021-10-16 02:35:50,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-10-16 02:35:50,430 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:50,430 INFO L512 BasicCegarLoop]: trace histogram [101, 100, 51, 50, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:50,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:50,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-10-16 02:35:50,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:51,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:35:51,037 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:35:51,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:51,037 INFO L82 PathProgramCache]: Analyzing trace with hash -338193904, now seen corresponding path program 8 times [2021-10-16 02:35:51,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:35:51,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709534735] [2021-10-16 02:35:51,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:35:51,038 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:35:51,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:35:51,039 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:35:51,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-16 02:35:52,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:35:52,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:35:52,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 105 conjunts are in the unsatisfiable core [2021-10-16 02:35:52,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:57,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:36:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:36:20,640 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:36:20,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709534735] [2021-10-16 02:36:20,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709534735] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:36:20,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [359624764] [2021-10-16 02:36:20,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:36:20,641 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:36:20,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:36:20,647 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:36:20,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-10-16 02:36:22,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:36:22,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:36:22,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 104 conjunts are in the unsatisfiable core [2021-10-16 02:36:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:36:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:36:23,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:36:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:36:24,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [359624764] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:36:24,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667668344] [2021-10-16 02:36:24,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:36:24,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:36:24,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:36:24,707 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:36:24,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-16 02:36:26,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:36:26,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:36:26,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 106 conjunts are in the unsatisfiable core [2021-10-16 02:36:26,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:36:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:36:27,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:36:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:36:30,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667668344] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:36:30,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:36:30,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 105, 104, 104, 104, 105] total 206 [2021-10-16 02:36:30,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712435605] [2021-10-16 02:36:30,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2021-10-16 02:36:30,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:36:30,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2021-10-16 02:36:30,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1786, Invalid=40444, Unknown=0, NotChecked=0, Total=42230 [2021-10-16 02:36:30,213 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) [2021-10-16 02:36:44,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:36:44,627 INFO L93 Difference]: Finished difference Result 3336 states and 3680 transitions. [2021-10-16 02:36:44,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-10-16 02:36:44,628 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 [2021-10-16 02:36:44,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:36:44,636 INFO L225 Difference]: With dead ends: 3336 [2021-10-16 02:36:44,636 INFO L226 Difference]: Without dead ends: 3332 [2021-10-16 02:36:44,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1843 GetRequests, 1638 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5151 ImplicationChecksByTransitivity, 24688.5ms TimeCoverageRelationStatistics Valid=1792, Invalid=40850, Unknown=0, NotChecked=0, Total=42642 [2021-10-16 02:36:44,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2021-10-16 02:36:45,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 3328. [2021-10-16 02:36:45,447 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) [2021-10-16 02:36:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 3673 transitions. [2021-10-16 02:36:45,455 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 3673 transitions. Word has length 308 [2021-10-16 02:36:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:36:45,455 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 3673 transitions. [2021-10-16 02:36:45,456 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) [2021-10-16 02:36:45,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 3673 transitions. [2021-10-16 02:36:45,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-10-16 02:36:45,461 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:36:45,462 INFO L512 BasicCegarLoop]: trace histogram [102, 101, 52, 50, 1, 1, 1, 1, 1, 1] [2021-10-16 02:36:45,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-16 02:36:45,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-16 02:36:45,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-10-16 02:36:46,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:36:46,075 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:36:46,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:36:46,076 INFO L82 PathProgramCache]: Analyzing trace with hash -2103022405, now seen corresponding path program 9 times [2021-10-16 02:36:46,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:36:46,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592450008] [2021-10-16 02:36:46,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:36:46,077 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:36:46,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:36:46,078 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:36:46,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-16 02:36:49,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 102 check-sat command(s) [2021-10-16 02:36:49,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:36:49,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 105 conjunts are in the unsatisfiable core [2021-10-16 02:36:49,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:36:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 303 proven. 15001 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-10-16 02:36:51,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:37:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 0 proven. 15304 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-10-16 02:37:02,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:37:02,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592450008] [2021-10-16 02:37:02,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592450008] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:37:02,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1915281009] [2021-10-16 02:37:02,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:37:02,095 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:37:02,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:37:02,096 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:37:02,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-10-16 02:37:05,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 102 check-sat command(s) [2021-10-16 02:37:05,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:37:05,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 105 conjunts are in the unsatisfiable core [2021-10-16 02:37:05,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:37:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 303 proven. 15001 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-10-16 02:37:06,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:37:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 0 proven. 15304 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-10-16 02:37:09,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1915281009] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:37:09,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755869576] [2021-10-16 02:37:09,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:37:09,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:37:09,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:37:09,500 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:37:09,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-16 02:37:13,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 102 check-sat command(s) [2021-10-16 02:37:13,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:37:13,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 105 conjunts are in the unsatisfiable core [2021-10-16 02:37:13,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:37:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 303 proven. 15001 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-10-16 02:37:14,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:37:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 0 proven. 15304 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-10-16 02:37:16,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755869576] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:37:16,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:37:16,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 56, 54, 56, 54, 56] total 108 [2021-10-16 02:37:16,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788922610] [2021-10-16 02:37:16,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-10-16 02:37:16,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:37:16,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-10-16 02:37:16,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2968, Invalid=8588, Unknown=0, NotChecked=0, Total=11556 [2021-10-16 02:37:16,778 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) [2021-10-16 02:37:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:37:19,219 INFO L93 Difference]: Finished difference Result 3328 states and 3673 transitions. [2021-10-16 02:37:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-16 02:37:19,220 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 [2021-10-16 02:37:19,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:37:19,220 INFO L225 Difference]: With dead ends: 3328 [2021-10-16 02:37:19,220 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:37:19,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1860 GetRequests, 1754 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 9065.0ms TimeCoverageRelationStatistics Valid=2968, Invalid=8588, Unknown=0, NotChecked=0, Total=11556 [2021-10-16 02:37:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:37:19,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:37:19,225 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) [2021-10-16 02:37:19,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:37:19,226 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 311 [2021-10-16 02:37:19,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:37:19,226 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:37:19,227 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) [2021-10-16 02:37:19,227 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:37:19,227 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:37:19,229 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:37:19,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-10-16 02:37:19,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-16 02:37:19,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2021-10-16 02:37:19,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:37:19,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:37:19,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:37:19,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:37:19,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:37:35,510 WARN L207 SmtUtils]: Spent 11.83 s on a formula simplification. DAG size of input: 969 DAG size of output: 357 [2021-10-16 02:37:35,515 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:37:35,515 INFO L857 garLoopResultBuilder]: For program point L29(lines 29 33) no Hoare annotation was computed. [2021-10-16 02:37:35,515 INFO L857 garLoopResultBuilder]: For program point L29-2(lines 28 36) no Hoare annotation was computed. [2021-10-16 02:37:35,516 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-16 02:37:35,516 INFO L860 garLoopResultBuilder]: At program point L38(lines 24 39) the Hoare annotation is: true [2021-10-16 02:37:35,516 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-16 02:37:35,516 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:37:35,516 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-16 02:37:35,517 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))) [2021-10-16 02:37:35,517 INFO L857 garLoopResultBuilder]: For program point L28-3(lines 28 36) no Hoare annotation was computed. [2021-10-16 02:37:35,518 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-16 02:37:35,518 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-10-16 02:37:35,518 INFO L860 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-10-16 02:37:35,522 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:37:35,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:37:35 BoogieIcfgContainer [2021-10-16 02:37:35,554 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:37:35,554 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:37:35,554 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:37:35,555 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:37:35,555 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:26:19" (3/4) ... [2021-10-16 02:37:35,558 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:37:35,567 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-16 02:37:35,567 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-16 02:37:35,568 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:37:35,568 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:37:35,601 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:37:35,601 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:37:35,602 INFO L168 Benchmark]: Toolchain (without parser) took 676562.30 ms. Allocated memory was 58.7 MB in the beginning and 1.6 GB in the end (delta: 1.6 GB). Free memory was 37.1 MB in the beginning and 1.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 302.9 MB. Max. memory is 16.1 GB. [2021-10-16 02:37:35,602 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 58.7 MB. Free memory was 39.0 MB in the beginning and 39.0 MB in the end (delta: 39.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:37:35,603 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.85 ms. Allocated memory is still 58.7 MB. Free memory was 36.9 MB in the beginning and 42.4 MB in the end (delta: -5.6 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:37:35,603 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.98 ms. Allocated memory is still 58.7 MB. Free memory was 42.4 MB in the beginning and 41.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:37:35,603 INFO L168 Benchmark]: Boogie Preprocessor took 50.58 ms. Allocated memory is still 58.7 MB. Free memory was 41.1 MB in the beginning and 39.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:37:35,604 INFO L168 Benchmark]: RCFGBuilder took 341.25 ms. Allocated memory is still 58.7 MB. Free memory was 39.9 MB in the beginning and 30.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:37:35,604 INFO L168 Benchmark]: TraceAbstraction took 675757.67 ms. Allocated memory was 58.7 MB in the beginning and 1.6 GB in the end (delta: 1.6 GB). Free memory was 30.3 MB in the beginning and 1.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.1 GB. Max. memory is 16.1 GB. [2021-10-16 02:37:35,605 INFO L168 Benchmark]: Witness Printer took 46.69 ms. Allocated memory is still 1.6 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:37:35,607 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 58.7 MB. Free memory was 39.0 MB in the beginning and 39.0 MB in the end (delta: 39.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 295.85 ms. Allocated memory is still 58.7 MB. Free memory was 36.9 MB in the beginning and 42.4 MB in the end (delta: -5.6 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.98 ms. Allocated memory is still 58.7 MB. Free memory was 42.4 MB in the beginning and 41.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 50.58 ms. Allocated memory is still 58.7 MB. Free memory was 41.1 MB in the beginning and 39.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 341.25 ms. Allocated memory is still 58.7 MB. Free memory was 39.9 MB in the beginning and 30.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 675757.67 ms. Allocated memory was 58.7 MB in the beginning and 1.6 GB in the end (delta: 1.6 GB). Free memory was 30.3 MB in the beginning and 1.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.1 GB. Max. memory is 16.1 GB. * Witness Printer took 46.69 ms. Allocated memory is still 1.6 GB. Free memory was 1.3 GB in the beginning and 1.3 GB 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: 675659.6ms, OverallIterations: 16, TraceHistogramMax: 102, EmptinessCheckTime: 42.8ms, AutomataDifference: 490004.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 15682.8ms, InitialAbstractionConstructionTime: 9.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 490 SDtfs, 6244 SDslu, 30115 SDs, 0 SdLazy, 60398 SolverSat, 7751 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 28793.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8773 GetRequests, 7160 SyntacticMatches, 0 SemanticMatches, 1613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90014 ImplicationChecksByTransitivity, 533686.6ms 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: 2771.1ms AutomataMinimizationTime, 16 MinimizatonAttempts, 35942 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 106 NumberOfFragments, 710 HoareAnnotationTreeSize, 3 FomulaSimplifications, 164920 FormulaSimplificationTreeSizeReduction, 3834.6ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 104250 FormulaSimplificationTreeSizeReductionInter, 11835.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 542.7ms SsaConstructionTime, 7273.3ms SatisfiabilityAnalysisTime, 123207.3ms 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! [2021-10-16 02:37:35,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39325c12-e6c3-4db2-82c3-7efbddfdda26/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...