./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark18_conjunctive.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_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/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_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark18_conjunctive.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/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_ce235447-72f8-4551-a908-1bacc79806de/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 f8588652636fd0551cf3f66b36ed7ad34574fc7b ........................................................................................................................................................................................................................................................................................................................................................ 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_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/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_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark18_conjunctive.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/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_ce235447-72f8-4551-a908-1bacc79806de/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 f8588652636fd0551cf3f66b36ed7ad34574fc7b ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 01:59:42,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 01:59:42,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 01:59:42,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 01:59:42,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 01:59:42,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 01:59:42,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 01:59:42,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 01:59:42,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 01:59:42,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 01:59:42,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 01:59:42,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 01:59:42,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 01:59:42,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 01:59:42,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 01:59:42,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 01:59:42,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 01:59:42,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 01:59:42,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 01:59:42,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 01:59:42,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 01:59:42,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 01:59:42,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 01:59:42,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 01:59:42,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 01:59:42,534 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 01:59:42,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 01:59:42,536 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 01:59:42,536 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 01:59:42,538 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 01:59:42,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 01:59:42,539 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 01:59:42,540 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 01:59:42,541 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 01:59:42,542 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 01:59:42,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 01:59:42,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 01:59:42,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 01:59:42,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 01:59:42,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 01:59:42,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 01:59:42,550 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 01:59:42,597 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 01:59:42,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 01:59:42,598 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 01:59:42,598 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 01:59:42,599 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 01:59:42,599 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 01:59:42,599 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 01:59:42,599 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 01:59:42,599 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 01:59:42,600 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 01:59:42,600 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 01:59:42,600 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 01:59:42,600 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 01:59:42,600 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 01:59:42,601 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 01:59:42,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 01:59:42,602 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 01:59:42,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 01:59:42,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 01:59:42,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 01:59:42,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 01:59:42,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 01:59:42,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 01:59:42,603 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 01:59:42,603 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 01:59:42,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 01:59:42,603 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 01:59:42,604 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 01:59:42,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 01:59:42,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 01:59:42,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 01:59:42,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 01:59:42,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 01:59:42,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 01:59:42,610 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 01:59:42,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 01:59:42,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 01:59:42,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 01:59:42,612 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 01:59:42,612 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_ce235447-72f8-4551-a908-1bacc79806de/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8588652636fd0551cf3f66b36ed7ad34574fc7b [2021-10-16 01:59:42,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 01:59:42,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 01:59:42,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 01:59:42,948 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 01:59:42,949 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 01:59:42,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-zilu/benchmark18_conjunctive.i [2021-10-16 01:59:43,014 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/data/128cf3659/d6af8e7b6e9b4a3f9979dc52d443228e/FLAGcb985ccf1 [2021-10-16 01:59:43,489 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 01:59:43,490 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/sv-benchmarks/c/loop-zilu/benchmark18_conjunctive.i [2021-10-16 01:59:43,501 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/data/128cf3659/d6af8e7b6e9b4a3f9979dc52d443228e/FLAGcb985ccf1 [2021-10-16 01:59:43,857 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/data/128cf3659/d6af8e7b6e9b4a3f9979dc52d443228e [2021-10-16 01:59:43,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 01:59:43,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 01:59:43,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 01:59:43,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 01:59:43,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 01:59:43,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:59:43" (1/1) ... [2021-10-16 01:59:43,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c602e78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:43, skipping insertion in model container [2021-10-16 01:59:43,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:59:43" (1/1) ... [2021-10-16 01:59:43,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 01:59:43,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 01:59:44,078 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_ce235447-72f8-4551-a908-1bacc79806de/sv-benchmarks/c/loop-zilu/benchmark18_conjunctive.i[873,886] [2021-10-16 01:59:44,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 01:59:44,112 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 01:59:44,124 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_ce235447-72f8-4551-a908-1bacc79806de/sv-benchmarks/c/loop-zilu/benchmark18_conjunctive.i[873,886] [2021-10-16 01:59:44,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 01:59:44,140 INFO L208 MainTranslator]: Completed translation [2021-10-16 01:59:44,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:44 WrapperNode [2021-10-16 01:59:44,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 01:59:44,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 01:59:44,143 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 01:59:44,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 01:59:44,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:44" (1/1) ... [2021-10-16 01:59:44,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:44" (1/1) ... [2021-10-16 01:59:44,175 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 01:59:44,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 01:59:44,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 01:59:44,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 01:59:44,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:44" (1/1) ... [2021-10-16 01:59:44,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:44" (1/1) ... [2021-10-16 01:59:44,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:44" (1/1) ... [2021-10-16 01:59:44,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:44" (1/1) ... [2021-10-16 01:59:44,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:44" (1/1) ... [2021-10-16 01:59:44,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:44" (1/1) ... [2021-10-16 01:59:44,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:44" (1/1) ... [2021-10-16 01:59:44,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 01:59:44,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 01:59:44,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 01:59:44,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 01:59:44,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:44" (1/1) ... [2021-10-16 01:59:44,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 01:59:44,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:59:44,230 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 01:59:44,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 01:59:44,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 01:59:44,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 01:59:44,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 01:59:44,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 01:59:44,534 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 01:59:44,534 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 01:59:44,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:59:44 BoogieIcfgContainer [2021-10-16 01:59:44,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 01:59:44,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 01:59:44,538 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 01:59:44,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 01:59:44,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 01:59:43" (1/3) ... [2021-10-16 01:59:44,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0daf6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:59:44, skipping insertion in model container [2021-10-16 01:59:44,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:44" (2/3) ... [2021-10-16 01:59:44,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0daf6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:59:44, skipping insertion in model container [2021-10-16 01:59:44,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:59:44" (3/3) ... [2021-10-16 01:59:44,544 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark18_conjunctive.i [2021-10-16 01:59:44,549 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 01:59:44,550 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 01:59:44,594 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 01:59:44,600 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 01:59:44,601 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 01:59:44,614 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 01:59:44,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 01:59:44,619 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:59:44,619 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 01:59:44,620 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:59:44,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:59:44,625 INFO L82 PathProgramCache]: Analyzing trace with hash 59349214, now seen corresponding path program 1 times [2021-10-16 01:59:44,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:59:44,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377493750] [2021-10-16 01:59:44,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:59:44,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:59:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:59:44,792 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 01:59:44,793 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:59:44,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377493750] [2021-10-16 01:59:44,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377493750] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:59:44,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:59:44,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 01:59:44,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841456026] [2021-10-16 01:59:44,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 01:59:44,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:59:44,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 01:59:44,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:59:44,816 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 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:44,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:59:44,842 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2021-10-16 01:59:44,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 01:59:44,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-16 01:59:44,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:59:44,851 INFO L225 Difference]: With dead ends: 16 [2021-10-16 01:59:44,852 INFO L226 Difference]: Without dead ends: 7 [2021-10-16 01:59:44,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:59:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-16 01:59:44,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-16 01:59:44,881 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 01:59:44,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-16 01:59:44,883 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-10-16 01:59:44,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:59:44,883 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-16 01:59:44,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:44,884 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-16 01:59:44,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 01:59:44,885 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:59:44,885 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 01:59:44,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 01:59:44,885 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:59:44,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:59:44,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1839242300, now seen corresponding path program 1 times [2021-10-16 01:59:44,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:59:44,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930706710] [2021-10-16 01:59:44,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:59:44,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:59:44,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:59:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:45,084 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:59:45,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930706710] [2021-10-16 01:59:45,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930706710] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 01:59:45,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438030310] [2021-10-16 01:59:45,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:59:45,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:59:45,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:59:45,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:59:45,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 01:59:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:59:45,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 01:59:45,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:59:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:45,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:59:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:45,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438030310] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:59:45,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1685368869] [2021-10-16 01:59:45,478 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-16 01:59:45,478 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 01:59:45,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 01:59:45,490 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 01:59:45,491 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 01:59:45,526 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:59:45,532 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 01:59:45,533 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:59:45,534 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-16 01:59:45,538 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 01:59:45,539 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:59:45,540 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-16 01:59:45,547 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 113 [2021-10-16 01:59:45,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 01:59:45,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 01:59:45,614 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-16 01:59:45,616 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 01:59:45,622 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:59:45,628 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 01:59:45,632 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:59:45,633 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 01:59:45,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 01:59:45,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 01:59:45,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:59:45,707 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:59:45,709 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-10-16 01:59:45,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 01:59:45,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:110, output treesize:98 [2021-10-16 01:59:45,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 01:59:45,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:59:45,912 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 01:59:45,916 INFO L168 Benchmark]: Toolchain (without parser) took 2054.00 ms. Allocated memory is still 104.9 MB. Free memory was 67.8 MB in the beginning and 52.3 MB in the end (delta: 15.5 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. [2021-10-16 01:59:45,916 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 104.9 MB. Free memory was 83.8 MB in the beginning and 83.8 MB in the end (delta: 74.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 01:59:45,917 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.98 ms. Allocated memory is still 104.9 MB. Free memory was 67.6 MB in the beginning and 82.0 MB in the end (delta: -14.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 01:59:45,918 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.73 ms. Allocated memory is still 104.9 MB. Free memory was 82.0 MB in the beginning and 80.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 01:59:45,918 INFO L168 Benchmark]: Boogie Preprocessor took 19.98 ms. Allocated memory is still 104.9 MB. Free memory was 80.4 MB in the beginning and 79.6 MB in the end (delta: 771.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 01:59:45,919 INFO L168 Benchmark]: RCFGBuilder took 340.03 ms. Allocated memory is still 104.9 MB. Free memory was 79.6 MB in the beginning and 69.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 01:59:45,919 INFO L168 Benchmark]: TraceAbstraction took 1376.45 ms. Allocated memory is still 104.9 MB. Free memory was 68.8 MB in the beginning and 52.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 19.1 MB. Max. memory is 16.1 GB. [2021-10-16 01:59:45,923 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 104.9 MB. Free memory was 83.8 MB in the beginning and 83.8 MB in the end (delta: 74.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 278.98 ms. Allocated memory is still 104.9 MB. Free memory was 67.6 MB in the beginning and 82.0 MB in the end (delta: -14.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.73 ms. Allocated memory is still 104.9 MB. Free memory was 82.0 MB in the beginning and 80.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.98 ms. Allocated memory is still 104.9 MB. Free memory was 80.4 MB in the beginning and 79.6 MB in the end (delta: 771.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 340.03 ms. Allocated memory is still 104.9 MB. Free memory was 79.6 MB in the beginning and 69.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1376.45 ms. Allocated memory is still 104.9 MB. Free memory was 68.8 MB in the beginning and 52.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 19.1 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 01:59:45,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 01:59:48,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 01:59:48,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 01:59:48,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 01:59:48,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 01:59:48,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 01:59:48,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 01:59:48,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 01:59:48,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 01:59:48,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 01:59:48,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 01:59:48,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 01:59:48,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 01:59:48,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 01:59:48,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 01:59:48,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 01:59:48,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 01:59:48,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 01:59:48,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 01:59:48,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 01:59:48,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 01:59:48,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 01:59:48,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 01:59:48,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 01:59:48,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 01:59:48,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 01:59:48,593 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 01:59:48,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 01:59:48,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 01:59:48,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 01:59:48,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 01:59:48,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 01:59:48,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 01:59:48,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 01:59:48,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 01:59:48,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 01:59:48,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 01:59:48,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 01:59:48,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 01:59:48,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 01:59:48,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 01:59:48,607 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 01:59:48,652 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 01:59:48,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 01:59:48,654 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 01:59:48,654 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 01:59:48,654 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 01:59:48,654 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 01:59:48,655 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 01:59:48,655 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 01:59:48,655 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 01:59:48,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 01:59:48,657 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 01:59:48,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 01:59:48,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 01:59:48,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 01:59:48,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 01:59:48,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 01:59:48,658 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 01:59:48,659 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 01:59:48,659 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 01:59:48,659 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 01:59:48,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 01:59:48,659 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 01:59:48,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 01:59:48,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 01:59:48,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 01:59:48,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 01:59:48,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 01:59:48,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 01:59:48,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 01:59:48,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 01:59:48,661 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 01:59:48,661 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 01:59:48,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 01:59:48,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 01:59:48,662 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 01:59:48,662 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_ce235447-72f8-4551-a908-1bacc79806de/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8588652636fd0551cf3f66b36ed7ad34574fc7b [2021-10-16 01:59:49,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 01:59:49,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 01:59:49,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 01:59:49,061 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 01:59:49,062 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 01:59:49,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-zilu/benchmark18_conjunctive.i [2021-10-16 01:59:49,136 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/data/b33b8a4a8/8dfa142e33734b739bd68434ab623dd9/FLAG1e994cba0 [2021-10-16 01:59:49,640 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 01:59:49,640 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/sv-benchmarks/c/loop-zilu/benchmark18_conjunctive.i [2021-10-16 01:59:49,649 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/data/b33b8a4a8/8dfa142e33734b739bd68434ab623dd9/FLAG1e994cba0 [2021-10-16 01:59:49,994 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/data/b33b8a4a8/8dfa142e33734b739bd68434ab623dd9 [2021-10-16 01:59:49,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 01:59:49,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 01:59:49,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 01:59:50,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 01:59:50,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 01:59:50,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:59:49" (1/1) ... [2021-10-16 01:59:50,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@695f62f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:50, skipping insertion in model container [2021-10-16 01:59:50,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:59:49" (1/1) ... [2021-10-16 01:59:50,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 01:59:50,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 01:59:50,180 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_ce235447-72f8-4551-a908-1bacc79806de/sv-benchmarks/c/loop-zilu/benchmark18_conjunctive.i[873,886] [2021-10-16 01:59:50,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 01:59:50,217 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 01:59:50,242 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_ce235447-72f8-4551-a908-1bacc79806de/sv-benchmarks/c/loop-zilu/benchmark18_conjunctive.i[873,886] [2021-10-16 01:59:50,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 01:59:50,266 INFO L208 MainTranslator]: Completed translation [2021-10-16 01:59:50,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:50 WrapperNode [2021-10-16 01:59:50,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 01:59:50,268 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 01:59:50,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 01:59:50,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 01:59:50,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:50" (1/1) ... [2021-10-16 01:59:50,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:50" (1/1) ... [2021-10-16 01:59:50,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 01:59:50,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 01:59:50,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 01:59:50,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 01:59:50,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:50" (1/1) ... [2021-10-16 01:59:50,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:50" (1/1) ... [2021-10-16 01:59:50,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:50" (1/1) ... [2021-10-16 01:59:50,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:50" (1/1) ... [2021-10-16 01:59:50,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:50" (1/1) ... [2021-10-16 01:59:50,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:50" (1/1) ... [2021-10-16 01:59:50,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:50" (1/1) ... [2021-10-16 01:59:50,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 01:59:50,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 01:59:50,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 01:59:50,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 01:59:50,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:50" (1/1) ... [2021-10-16 01:59:50,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 01:59:50,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:59:50,386 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 01:59:50,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 01:59:50,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 01:59:50,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 01:59:50,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 01:59:50,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 01:59:50,712 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 01:59:50,712 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 01:59:50,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:59:50 BoogieIcfgContainer [2021-10-16 01:59:50,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 01:59:50,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 01:59:50,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 01:59:50,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 01:59:50,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 01:59:49" (1/3) ... [2021-10-16 01:59:50,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c53bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:59:50, skipping insertion in model container [2021-10-16 01:59:50,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:59:50" (2/3) ... [2021-10-16 01:59:50,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c53bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:59:50, skipping insertion in model container [2021-10-16 01:59:50,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:59:50" (3/3) ... [2021-10-16 01:59:50,737 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark18_conjunctive.i [2021-10-16 01:59:50,743 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 01:59:50,743 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 01:59:50,826 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 01:59:50,853 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 01:59:50,853 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 01:59:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:50,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 01:59:50,900 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:59:50,901 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:59:50,902 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:59:50,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:59:50,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1807089479, now seen corresponding path program 1 times [2021-10-16 01:59:50,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:59:50,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448066571] [2021-10-16 01:59:50,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:59:50,935 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:59:50,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:59:50,941 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:59:50,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 01:59:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:59:51,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 01:59:51,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:59:51,105 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 01:59:51,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:59:51,132 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 01:59:51,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:59:51,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448066571] [2021-10-16 01:59:51,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448066571] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:59:51,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:59:51,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 01:59:51,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772656531] [2021-10-16 01:59:51,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 01:59:51,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:59:51,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 01:59:51,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 01:59:51,166 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:51,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:59:51,179 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-10-16 01:59:51,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 01:59:51,181 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-16 01:59:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:59:51,190 INFO L225 Difference]: With dead ends: 20 [2021-10-16 01:59:51,190 INFO L226 Difference]: Without dead ends: 8 [2021-10-16 01:59:51,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 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 01:59:51,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-16 01:59:51,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-16 01:59:51,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-16 01:59:51,224 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 7 [2021-10-16 01:59:51,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:59:51,225 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-16 01:59:51,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:51,226 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-16 01:59:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 01:59:51,227 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:59:51,227 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:59:51,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-16 01:59:51,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 01:59:51,433 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:59:51,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:59:51,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1806970315, now seen corresponding path program 1 times [2021-10-16 01:59:51,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:59:51,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745260729] [2021-10-16 01:59:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:59:51,435 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:59:51,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:59:51,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:59:51,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 01:59:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:59:51,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 01:59:51,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:59:51,547 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 01:59:51,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:59:51,582 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 01:59:51,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:59:51,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745260729] [2021-10-16 01:59:51,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745260729] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:59:51,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:59:51,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 01:59:51,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914625468] [2021-10-16 01:59:51,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 01:59:51,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:59:51,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 01:59:51,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:59:51,587 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 01:59:51,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:59:51,607 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-10-16 01:59:51,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 01:59:51,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-16 01:59:51,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:59:51,608 INFO L225 Difference]: With dead ends: 13 [2021-10-16 01:59:51,608 INFO L226 Difference]: Without dead ends: 9 [2021-10-16 01:59:51,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:59:51,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-16 01:59:51,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-16 01:59:51,612 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 01:59:51,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-16 01:59:51,613 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-10-16 01:59:51,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:59:51,613 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-16 01:59:51,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 01:59:51,614 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-16 01:59:51,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 01:59:51,614 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:59:51,614 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:59:51,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 01:59:51,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 01:59:51,833 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:59:51,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:59:51,834 INFO L82 PathProgramCache]: Analyzing trace with hash 183170323, now seen corresponding path program 1 times [2021-10-16 01:59:51,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:59:51,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069806840] [2021-10-16 01:59:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:59:51,835 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:59:51,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:59:51,845 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:59:51,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 01:59:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:59:51,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 01:59:51,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:59:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:52,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:59:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:52,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:59:52,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069806840] [2021-10-16 01:59:52,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069806840] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:59:52,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1218374492] [2021-10-16 01:59:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:59:52,429 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 01:59:52,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 01:59:52,432 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 01:59:52,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-16 01:59:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:59:52,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 01:59:52,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:59:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:52,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:59:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:52,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1218374492] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:59:52,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071463738] [2021-10-16 01:59:52,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:59:52,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:59:52,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:59:52,758 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:59:52,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-16 01:59:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:59:52,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 01:59:52,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:59:52,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:52,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:59:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:53,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071463738] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:59:53,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 01:59:53,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-10-16 01:59:53,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425521742] [2021-10-16 01:59:53,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 01:59:53,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:59:53,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 01:59:53,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-16 01:59:53,023 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:53,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:59:53,118 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-10-16 01:59:53,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 01:59:53,120 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 01:59:53,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:59:53,120 INFO L225 Difference]: With dead ends: 17 [2021-10-16 01:59:53,120 INFO L226 Difference]: Without dead ends: 11 [2021-10-16 01:59:53,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 180.4ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-16 01:59:53,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-16 01:59:53,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-16 01:59:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 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 01:59:53,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-16 01:59:53,124 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2021-10-16 01:59:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:59:53,126 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-16 01:59:53,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:59:53,127 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-16 01:59:53,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 01:59:53,129 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:59:53,129 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:59:53,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-16 01:59:53,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 01:59:53,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-10-16 01:59:53,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 01:59:53,753 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:59:53,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:59:53,754 INFO L82 PathProgramCache]: Analyzing trace with hash -13685741, now seen corresponding path program 2 times [2021-10-16 01:59:53,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:59:53,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055576322] [2021-10-16 01:59:53,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 01:59:53,757 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:59:53,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:59:53,759 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:59:53,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 01:59:53,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 01:59:53,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 01:59:53,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 01:59:53,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:59:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:54,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:59:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:54,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:59:54,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055576322] [2021-10-16 01:59:54,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055576322] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:59:54,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1733750266] [2021-10-16 01:59:54,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 01:59:54,566 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 01:59:54,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 01:59:54,581 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 01:59:54,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-16 01:59:54,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 01:59:54,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 01:59:54,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 01:59:54,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:59:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:54,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:59:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:55,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1733750266] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:59:55,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638666258] [2021-10-16 01:59:55,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 01:59:55,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:59:55,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:59:55,050 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:59:55,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-16 01:59:55,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 01:59:55,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 01:59:55,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 01:59:55,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:59:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:55,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:59:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:55,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638666258] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:59:55,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 01:59:55,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2021-10-16 01:59:55,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454613700] [2021-10-16 01:59:55,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 01:59:55,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:59:55,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 01:59:55,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-10-16 01:59:55,513 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 01:59:56,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:59:56,397 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-10-16 01:59:56,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 01:59:56,398 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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) Word has length 10 [2021-10-16 01:59:56,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:59:56,399 INFO L225 Difference]: With dead ends: 22 [2021-10-16 01:59:56,399 INFO L226 Difference]: Without dead ends: 16 [2021-10-16 01:59:56,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1083.8ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-10-16 01:59:56,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-16 01:59:56,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-16 01:59:56,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 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 01:59:56,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-10-16 01:59:56,404 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 10 [2021-10-16 01:59:56,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:59:56,404 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-10-16 01:59:56,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 01:59:56,405 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-10-16 01:59:56,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 01:59:56,405 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:59:56,406 INFO L512 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:59:56,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-10-16 01:59:56,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 01:59:56,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-16 01:59:57,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:59:57,007 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:59:57,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:59:57,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1708282315, now seen corresponding path program 3 times [2021-10-16 01:59:57,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:59:57,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1143179759] [2021-10-16 01:59:57,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 01:59:57,008 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:59:57,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:59:57,010 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:59:57,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 01:59:57,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-16 01:59:57,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 01:59:57,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-16 01:59:57,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:59:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:57,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:59:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:58,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:59:58,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1143179759] [2021-10-16 01:59:58,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1143179759] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:59:58,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1455083294] [2021-10-16 01:59:58,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 01:59:58,387 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 01:59:58,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 01:59:58,401 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 01:59:58,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-16 01:59:58,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-16 01:59:58,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 01:59:58,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-16 01:59:58,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:59:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:58,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:59:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:59,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1455083294] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:59:59,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559392198] [2021-10-16 01:59:59,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 01:59:59,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:59:59,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:59:59,065 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:59:59,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-16 01:59:59,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-16 01:59:59,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 01:59:59,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-16 01:59:59,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:59:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:59,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:59:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:59,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559392198] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:59:59,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 01:59:59,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2021-10-16 01:59:59,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134116882] [2021-10-16 01:59:59,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-16 01:59:59,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:59:59,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-16 01:59:59,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-10-16 01:59:59,671 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 24 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:02,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:00:02,529 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-10-16 02:00:02,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-16 02:00:02,529 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-16 02:00:02,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:00:02,530 INFO L225 Difference]: With dead ends: 32 [2021-10-16 02:00:02,530 INFO L226 Difference]: Without dead ends: 26 [2021-10-16 02:00:02,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 3355.4ms TimeCoverageRelationStatistics Valid=436, Invalid=1124, Unknown=0, NotChecked=0, Total=1560 [2021-10-16 02:00:02,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-16 02:00:02,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-16 02:00:02,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-10-16 02:00:02,537 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 15 [2021-10-16 02:00:02,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:00:02,537 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-10-16 02:00:02,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:00:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-10-16 02:00:02,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-16 02:00:02,539 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:00:02,539 INFO L512 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:00:02,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:02,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:02,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:03,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:00:03,153 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:00:03,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:00:03,154 INFO L82 PathProgramCache]: Analyzing trace with hash -747413813, now seen corresponding path program 4 times [2021-10-16 02:00:03,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:00:03,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982117039] [2021-10-16 02:00:03,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:00:03,154 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:00:03,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:00:03,157 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:00:03,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 02:00:03,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:00:03,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:00:03,376 WARN L261 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-16 02:00:03,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:04,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:07,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:00:07,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982117039] [2021-10-16 02:00:07,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982117039] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:00:07,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1204489335] [2021-10-16 02:00:07,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:00:07,613 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:00:07,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:00:07,614 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:00:07,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-16 02:00:07,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:00:07,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:00:07,941 WARN L261 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-16 02:00:07,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:08,798 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:08,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:13,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1204489335] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:00:13,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576452405] [2021-10-16 02:00:13,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:00:13,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:00:13,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:00:13,856 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:00:13,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-16 02:00:14,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:00:14,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:00:14,139 WARN L261 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-16 02:00:14,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:14,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:15,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576452405] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:00:15,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:00:15,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23, 23, 23] total 74 [2021-10-16 02:00:15,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652780542] [2021-10-16 02:00:15,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-10-16 02:00:15,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:00:15,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-10-16 02:00:15,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=4024, Unknown=0, NotChecked=0, Total=5402 [2021-10-16 02:00:15,198 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 74 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 74 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 02:00:33,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:00:33,534 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-10-16 02:00:33,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-16 02:00:33,535 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 74 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-16 02:00:33,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:00:33,538 INFO L225 Difference]: With dead ends: 52 [2021-10-16 02:00:33,538 INFO L226 Difference]: Without dead ends: 46 [2021-10-16 02:00:33,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 25022.0ms TimeCoverageRelationStatistics Valid=2905, Invalid=8225, Unknown=0, NotChecked=0, Total=11130 [2021-10-16 02:00:33,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-16 02:00:33,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-10-16 02:00:33,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 02:00:33,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-10-16 02:00:33,551 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 25 [2021-10-16 02:00:33,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:00:33,551 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-10-16 02:00:33,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 74 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 02:00:33,552 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-10-16 02:00:33,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-16 02:00:33,553 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:00:33,553 INFO L512 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:00:33,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:33,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:33,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:00:34,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:00:34,154 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:00:34,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:00:34,155 INFO L82 PathProgramCache]: Analyzing trace with hash 545306827, now seen corresponding path program 5 times [2021-10-16 02:00:34,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:00:34,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247387372] [2021-10-16 02:00:34,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:00:34,155 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:00:34,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:00:34,157 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:00:34,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-16 02:00:34,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-10-16 02:00:34,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:00:34,667 WARN L261 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 86 conjunts are in the unsatisfiable core [2021-10-16 02:00:34,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:36,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:00:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:47,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:00:47,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247387372] [2021-10-16 02:00:47,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247387372] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:00:47,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1553341890] [2021-10-16 02:00:47,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:00:47,302 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:00:47,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:00:47,302 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:00:47,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-10-16 02:00:48,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-10-16 02:00:48,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:00:48,015 WARN L261 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 86 conjunts are in the unsatisfiable core [2021-10-16 02:00:48,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:00:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:00:48,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:01:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:01:07,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1553341890] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:01:07,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508278781] [2021-10-16 02:01:07,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:01:07,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:01:07,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:01:07,349 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:01:07,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-16 02:01:08,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-10-16 02:01:08,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:01:08,017 WARN L261 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 87 conjunts are in the unsatisfiable core [2021-10-16 02:01:08,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:01:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:01:08,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:01:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:01:10,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508278781] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:01:10,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:01:10,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43, 43, 43, 43] total 128 [2021-10-16 02:01:10,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299499878] [2021-10-16 02:01:10,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-10-16 02:01:10,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:01:10,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-10-16 02:01:10,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3908, Invalid=12348, Unknown=0, NotChecked=0, Total=16256 [2021-10-16 02:01:10,883 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 128 states, 128 states have (on average 1.0546875) internal successors, (135), 128 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:01:15,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:01:15,765 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-10-16 02:01:15,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-16 02:01:15,765 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.0546875) internal successors, (135), 128 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-10-16 02:01:15,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:01:15,766 INFO L225 Difference]: With dead ends: 49 [2021-10-16 02:01:15,766 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:01:15,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 133 SyntacticMatches, 5 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3237 ImplicationChecksByTransitivity, 32189.6ms TimeCoverageRelationStatistics Valid=6724, Invalid=19682, Unknown=0, NotChecked=0, Total=26406 [2021-10-16 02:01:15,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:01:15,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:01:15,775 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 02:01:15,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:01:15,775 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2021-10-16 02:01:15,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:01:15,775 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:01:15,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.0546875) internal successors, (135), 128 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:01:15,776 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:01:15,776 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:01:15,779 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:01:15,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-16 02:01:16,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:01:16,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-10-16 02:01:16,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:01:16,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:01:16,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:01:16,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:01:17,467 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:01:17,468 INFO L857 garLoopResultBuilder]: For program point L23(line 23) no Hoare annotation was computed. [2021-10-16 02:01:17,468 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-10-16 02:01:17,468 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-16 02:01:17,468 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:01:17,468 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-16 02:01:17,468 INFO L860 garLoopResultBuilder]: At program point L28(lines 19 29) the Hoare annotation is: true [2021-10-16 02:01:17,468 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-10-16 02:01:17,468 INFO L853 garLoopResultBuilder]: At program point L24-2(lines 24 26) the Hoare annotation is: (and (or (= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (bvslt ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0)) (= ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~k~0)) [2021-10-16 02:01:17,469 INFO L857 garLoopResultBuilder]: For program point L24-3(lines 24 26) no Hoare annotation was computed. [2021-10-16 02:01:17,469 INFO L857 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-10-16 02:01:17,469 INFO L857 garLoopResultBuilder]: For program point L14(lines 14 18) no Hoare annotation was computed. [2021-10-16 02:01:17,473 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:01:17,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:01:17 BoogieIcfgContainer [2021-10-16 02:01:17,484 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:01:17,484 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:01:17,484 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:01:17,485 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:01:17,485 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:59:50" (3/4) ... [2021-10-16 02:01:17,488 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:01:17,497 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-16 02:01:17,497 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-16 02:01:17,497 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:01:17,497 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:01:17,556 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:01:17,556 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:01:17,558 INFO L168 Benchmark]: Toolchain (without parser) took 87558.95 ms. Allocated memory was 69.2 MB in the beginning and 102.8 MB in the end (delta: 33.6 MB). Free memory was 50.5 MB in the beginning and 54.0 MB in the end (delta: -3.5 MB). Peak memory consumption was 30.9 MB. Max. memory is 16.1 GB. [2021-10-16 02:01:17,558 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 69.2 MB. Free memory was 49.8 MB in the beginning and 49.7 MB in the end (delta: 54.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:01:17,559 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.93 ms. Allocated memory is still 69.2 MB. Free memory was 50.2 MB in the beginning and 52.2 MB in the end (delta: -2.0 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:01:17,560 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.67 ms. Allocated memory is still 69.2 MB. Free memory was 52.0 MB in the beginning and 50.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:01:17,560 INFO L168 Benchmark]: Boogie Preprocessor took 22.13 ms. Allocated memory is still 69.2 MB. Free memory was 50.7 MB in the beginning and 49.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:01:17,560 INFO L168 Benchmark]: RCFGBuilder took 369.39 ms. Allocated memory is still 69.2 MB. Free memory was 49.5 MB in the beginning and 40.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:01:17,561 INFO L168 Benchmark]: TraceAbstraction took 86768.68 ms. Allocated memory was 69.2 MB in the beginning and 102.8 MB in the end (delta: 33.6 MB). Free memory was 40.0 MB in the beginning and 56.1 MB in the end (delta: -16.2 MB). Peak memory consumption was 55.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:01:17,561 INFO L168 Benchmark]: Witness Printer took 72.15 ms. Allocated memory is still 102.8 MB. Free memory was 56.1 MB in the beginning and 54.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:01:17,564 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 69.2 MB. Free memory was 49.8 MB in the beginning and 49.7 MB in the end (delta: 54.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 267.93 ms. Allocated memory is still 69.2 MB. Free memory was 50.2 MB in the beginning and 52.2 MB in the end (delta: -2.0 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.67 ms. Allocated memory is still 69.2 MB. Free memory was 52.0 MB in the beginning and 50.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.13 ms. Allocated memory is still 69.2 MB. Free memory was 50.7 MB in the beginning and 49.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 369.39 ms. Allocated memory is still 69.2 MB. Free memory was 49.5 MB in the beginning and 40.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 86768.68 ms. Allocated memory was 69.2 MB in the beginning and 102.8 MB in the end (delta: 33.6 MB). Free memory was 40.0 MB in the beginning and 56.1 MB in the end (delta: -16.2 MB). Peak memory consumption was 55.6 MB. Max. memory is 16.1 GB. * Witness Printer took 72.15 ms. Allocated memory is still 102.8 MB. Free memory was 56.1 MB in the beginning and 54.0 MB in the end (delta: 2.1 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: 16]: 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, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 86648.5ms, OverallIterations: 7, TraceHistogramMax: 38, EmptinessCheckTime: 44.1ms, AutomataDifference: 27157.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1069.3ms, InitialAbstractionConstructionTime: 9.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 43 SDtfs, 598 SDslu, 229 SDs, 0 SdLazy, 2854 SolverSat, 507 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2493.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 703 GetRequests, 361 SyntacticMatches, 9 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5585 ImplicationChecksByTransitivity, 61846.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=6, InterpolantAutomatonStates: 145, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 42.0ms AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 42 NumberOfFragments, 12 HoareAnnotationTreeSize, 2 FomulaSimplifications, 207 FormulaSimplificationTreeSizeReduction, 372.1ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 2648 FormulaSimplificationTreeSizeReductionInter, 691.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 177.1ms SsaConstructionTime, 1134.7ms SatisfiabilityAnalysisTime, 50611.0ms InterpolantComputationTime, 323 NumberOfCodeBlocks, 323 NumberOfCodeBlocksAsserted, 89 NumberOfCheckSat, 612 ConstructedInterpolants, 0 QuantifiedInterpolants, 6951 SizeOfPredicates, 114 NumberOfNonLiveVariables, 1088 ConjunctsInSsa, 549 ConjunctsInUnsatCore, 34 InterpolantComputations, 4 PerfectInterpolantSequences, 0/5730 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: 24]: Loop Invariant Derived loop invariant: (k == n || ~bvslt32(i, n)) && i == k - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-16 02:01:17,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce235447-72f8-4551-a908-1bacc79806de/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...