./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/nested_1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/nested_1-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3307686edde000bd6f2709f8ce62af668302d3bc ................................................................................................................................................................................................................................................................................................................................................................................................. 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_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/nested_1-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3307686edde000bd6f2709f8ce62af668302d3bc ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:08:41,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:08:41,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:08:41,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:08:41,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:08:41,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:08:41,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:08:41,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:08:41,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:08:41,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:08:41,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:08:41,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:08:41,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:08:41,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:08:41,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:08:41,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:08:41,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:08:41,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:08:41,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:08:41,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:08:41,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:08:41,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:08:41,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:08:41,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:08:41,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:08:41,528 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:08:41,529 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:08:41,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:08:41,531 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:08:41,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:08:41,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:08:41,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:08:41,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:08:41,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:08:41,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:08:41,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:08:41,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:08:41,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:08:41,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:08:41,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:08:41,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:08:41,545 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 08:08:41,575 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:08:41,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:08:41,577 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:08:41,577 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:08:41,577 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:08:41,578 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:08:41,578 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:08:41,578 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:08:41,578 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:08:41,579 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:08:41,579 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:08:41,579 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:08:41,580 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:08:41,580 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:08:41,580 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:08:41,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:08:41,581 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:08:41,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:08:41,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:08:41,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:08:41,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:08:41,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:08:41,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:08:41,583 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:08:41,583 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:08:41,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:08:41,584 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:08:41,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:08:41,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:08:41,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:08:41,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:08:41,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:08:41,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:08:41,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:08:41,586 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:08:41,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:08:41,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:08:41,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:08:41,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:08:41,587 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_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3307686edde000bd6f2709f8ce62af668302d3bc [2021-10-13 08:08:41,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:08:41,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:08:41,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:08:41,871 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:08:41,872 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:08:41,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-acceleration/nested_1-1.c [2021-10-13 08:08:41,940 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/data/f3264e53c/78c8ca0216dd45b79e1373689064bccb/FLAGb0b3f1b8d [2021-10-13 08:08:42,459 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:08:42,460 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/sv-benchmarks/c/loop-acceleration/nested_1-1.c [2021-10-13 08:08:42,468 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/data/f3264e53c/78c8ca0216dd45b79e1373689064bccb/FLAGb0b3f1b8d [2021-10-13 08:08:42,819 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/data/f3264e53c/78c8ca0216dd45b79e1373689064bccb [2021-10-13 08:08:42,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:08:42,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:08:42,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:08:42,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:08:42,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:08:42,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:42" (1/1) ... [2021-10-13 08:08:42,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d20445c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:42, skipping insertion in model container [2021-10-13 08:08:42,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:42" (1/1) ... [2021-10-13 08:08:42,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:08:42,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:08:43,048 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_7626510b-01c5-44d0-a89d-9b5e251ac6ba/sv-benchmarks/c/loop-acceleration/nested_1-1.c[322,335] [2021-10-13 08:08:43,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:08:43,081 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:08:43,093 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_7626510b-01c5-44d0-a89d-9b5e251ac6ba/sv-benchmarks/c/loop-acceleration/nested_1-1.c[322,335] [2021-10-13 08:08:43,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:08:43,113 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:08:43,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:43 WrapperNode [2021-10-13 08:08:43,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:08:43,115 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:08:43,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:08:43,115 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:08:43,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:43" (1/1) ... [2021-10-13 08:08:43,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:43" (1/1) ... [2021-10-13 08:08:43,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:08:43,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:08:43,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:08:43,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:08:43,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:43" (1/1) ... [2021-10-13 08:08:43,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:43" (1/1) ... [2021-10-13 08:08:43,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:43" (1/1) ... [2021-10-13 08:08:43,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:43" (1/1) ... [2021-10-13 08:08:43,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:43" (1/1) ... [2021-10-13 08:08:43,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:43" (1/1) ... [2021-10-13 08:08:43,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:43" (1/1) ... [2021-10-13 08:08:43,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:08:43,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:08:43,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:08:43,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:08:43,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:43" (1/1) ... [2021-10-13 08:08:43,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:08:43,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:08:43,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:08:43,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:08:43,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:08:43,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:08:43,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:08:43,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:08:43,615 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:08:43,615 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 08:08:43,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:43 BoogieIcfgContainer [2021-10-13 08:08:43,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:08:43,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:08:43,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:08:43,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:08:43,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:08:42" (1/3) ... [2021-10-13 08:08:43,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4423b756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:43, skipping insertion in model container [2021-10-13 08:08:43,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:43" (2/3) ... [2021-10-13 08:08:43,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4423b756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:43, skipping insertion in model container [2021-10-13 08:08:43,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:43" (3/3) ... [2021-10-13 08:08:43,627 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2021-10-13 08:08:43,633 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:08:43,633 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:08:43,682 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:08:43,690 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 08:08:43,691 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:08:43,706 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:43,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 08:08:43,711 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:43,712 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 08:08:43,712 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:43,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:43,723 INFO L82 PathProgramCache]: Analyzing trace with hash 2220904, now seen corresponding path program 1 times [2021-10-13 08:08:43,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:43,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158614167] [2021-10-13 08:08:43,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:43,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:43,917 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:43,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158614167] [2021-10-13 08:08:43,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158614167] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:43,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:43,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:08:43,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49704710] [2021-10-13 08:08:43,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:08:43,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:43,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:08:43,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:43,943 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:43,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:43,970 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2021-10-13 08:08:43,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:08:43,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 08:08:43,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:43,982 INFO L225 Difference]: With dead ends: 15 [2021-10-13 08:08:43,983 INFO L226 Difference]: Without dead ends: 8 [2021-10-13 08:08:43,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-13 08:08:44,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2021-10-13 08:08:44,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2021-10-13 08:08:44,022 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 4 [2021-10-13 08:08:44,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:44,022 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-10-13 08:08:44,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:44,023 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2021-10-13 08:08:44,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 08:08:44,024 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:44,024 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 08:08:44,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:08:44,025 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:44,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:44,026 INFO L82 PathProgramCache]: Analyzing trace with hash 2101473510, now seen corresponding path program 1 times [2021-10-13 08:08:44,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:44,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685217949] [2021-10-13 08:08:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:44,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:44,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:44,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685217949] [2021-10-13 08:08:44,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685217949] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:44,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:44,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:08:44,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906466078] [2021-10-13 08:08:44,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:08:44,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:44,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:08:44,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:44,127 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:44,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:44,141 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2021-10-13 08:08:44,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:08:44,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 08:08:44,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:44,143 INFO L225 Difference]: With dead ends: 13 [2021-10-13 08:08:44,143 INFO L226 Difference]: Without dead ends: 8 [2021-10-13 08:08:44,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:44,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-13 08:08:44,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-13 08:08:44,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:44,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-10-13 08:08:44,147 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-10-13 08:08:44,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:44,148 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-13 08:08:44,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:44,149 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-10-13 08:08:44,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 08:08:44,149 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:44,150 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:44,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 08:08:44,150 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:44,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:44,151 INFO L82 PathProgramCache]: Analyzing trace with hash 698037110, now seen corresponding path program 1 times [2021-10-13 08:08:44,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:44,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784041317] [2021-10-13 08:08:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:44,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:44,272 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:44,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784041317] [2021-10-13 08:08:44,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784041317] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:08:44,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984272684] [2021-10-13 08:08:44,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:44,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:08:44,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:08:44,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:08:44,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:08:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:44,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:08:44,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:44,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:08:44,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984272684] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:08:44,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [176340182] [2021-10-13 08:08:44,543 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-13 08:08:44,543 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:08:44,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:08:44,555 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:08:44,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:08:44,592 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:44,603 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:08:44,604 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:44,605 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 08:08:44,607 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:08:44,607 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:44,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 08:08:44,612 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-10-13 08:08:44,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:44,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:44,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:44,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 08:08:44,663 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:44,664 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 08:08:44,665 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:44,666 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 08:08:44,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 08:08:44,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:08:44,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:44,703 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:44,706 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-10-13 08:08:44,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 08:08:44,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:122, output treesize:125 [2021-10-13 08:08:44,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:44,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:08:44,928 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_10| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 08:08:44,932 INFO L168 Benchmark]: Toolchain (without parser) took 2107.00 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 85.0 MB in the beginning and 89.5 MB in the end (delta: -4.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:44,933 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 115.3 MB. Free memory is still 68.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:08:44,934 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.41 ms. Allocated memory is still 115.3 MB. Free memory was 85.0 MB in the beginning and 90.3 MB in the end (delta: -5.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:44,936 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.61 ms. Allocated memory is still 115.3 MB. Free memory was 90.3 MB in the beginning and 88.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:44,936 INFO L168 Benchmark]: Boogie Preprocessor took 22.80 ms. Allocated memory is still 115.3 MB. Free memory was 88.9 MB in the beginning and 87.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:08:44,937 INFO L168 Benchmark]: RCFGBuilder took 439.88 ms. Allocated memory is still 115.3 MB. Free memory was 87.6 MB in the beginning and 77.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:44,938 INFO L168 Benchmark]: TraceAbstraction took 1310.84 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 77.1 MB in the beginning and 89.5 MB in the end (delta: -12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:44,941 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 115.3 MB. Free memory is still 68.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 288.41 ms. Allocated memory is still 115.3 MB. Free memory was 85.0 MB in the beginning and 90.3 MB in the end (delta: -5.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.61 ms. Allocated memory is still 115.3 MB. Free memory was 90.3 MB in the beginning and 88.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.80 ms. Allocated memory is still 115.3 MB. Free memory was 88.9 MB in the beginning and 87.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 439.88 ms. Allocated memory is still 115.3 MB. Free memory was 87.6 MB in the beginning and 77.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1310.84 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 77.1 MB in the beginning and 89.5 MB in the end (delta: -12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_10| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_10|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 08:08:44,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:08:47,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:08:47,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:08:47,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:08:47,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:08:47,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:08:47,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:08:47,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:08:47,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:08:47,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:08:47,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:08:47,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:08:47,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:08:47,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:08:47,721 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:08:47,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:08:47,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:08:47,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:08:47,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:08:47,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:08:47,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:08:47,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:08:47,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:08:47,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:08:47,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:08:47,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:08:47,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:08:47,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:08:47,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:08:47,749 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:08:47,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:08:47,751 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:08:47,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:08:47,753 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:08:47,755 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:08:47,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:08:47,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:08:47,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:08:47,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:08:47,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:08:47,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:08:47,767 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 08:08:47,822 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:08:47,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:08:47,824 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:08:47,824 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:08:47,824 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:08:47,825 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:08:47,825 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:08:47,825 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:08:47,826 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:08:47,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:08:47,829 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:08:47,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:08:47,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:08:47,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:08:47,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:08:47,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:08:47,830 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:08:47,831 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:08:47,831 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:08:47,831 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:08:47,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:08:47,832 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:08:47,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:08:47,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:08:47,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:08:47,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:08:47,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:08:47,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:08:47,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:08:47,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:08:47,834 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:08:47,835 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:08:47,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:08:47,835 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:08:47,836 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:08:47,836 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_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3307686edde000bd6f2709f8ce62af668302d3bc [2021-10-13 08:08:48,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:08:48,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:08:48,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:08:48,282 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:08:48,283 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:08:48,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-acceleration/nested_1-1.c [2021-10-13 08:08:48,358 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/data/d1b251de0/e85872b971cc40f5968543576427443b/FLAGf0ad537ed [2021-10-13 08:08:48,971 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:08:48,972 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/sv-benchmarks/c/loop-acceleration/nested_1-1.c [2021-10-13 08:08:48,979 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/data/d1b251de0/e85872b971cc40f5968543576427443b/FLAGf0ad537ed [2021-10-13 08:08:49,307 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/data/d1b251de0/e85872b971cc40f5968543576427443b [2021-10-13 08:08:49,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:08:49,315 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:08:49,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:08:49,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:08:49,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:08:49,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:49" (1/1) ... [2021-10-13 08:08:49,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@330f265a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:49, skipping insertion in model container [2021-10-13 08:08:49,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:49" (1/1) ... [2021-10-13 08:08:49,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:08:49,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:08:49,557 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_7626510b-01c5-44d0-a89d-9b5e251ac6ba/sv-benchmarks/c/loop-acceleration/nested_1-1.c[322,335] [2021-10-13 08:08:49,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:08:49,597 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:08:49,617 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_7626510b-01c5-44d0-a89d-9b5e251ac6ba/sv-benchmarks/c/loop-acceleration/nested_1-1.c[322,335] [2021-10-13 08:08:49,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:08:49,642 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:08:49,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:49 WrapperNode [2021-10-13 08:08:49,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:08:49,645 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:08:49,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:08:49,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:08:49,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:49" (1/1) ... [2021-10-13 08:08:49,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:49" (1/1) ... [2021-10-13 08:08:49,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:08:49,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:08:49,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:08:49,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:08:49,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:49" (1/1) ... [2021-10-13 08:08:49,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:49" (1/1) ... [2021-10-13 08:08:49,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:49" (1/1) ... [2021-10-13 08:08:49,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:49" (1/1) ... [2021-10-13 08:08:49,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:49" (1/1) ... [2021-10-13 08:08:49,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:49" (1/1) ... [2021-10-13 08:08:49,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:49" (1/1) ... [2021-10-13 08:08:49,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:08:49,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:08:49,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:08:49,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:08:49,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:49" (1/1) ... [2021-10-13 08:08:49,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:08:49,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:08:49,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:08:49,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:08:49,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:08:49,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:08:49,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 08:08:49,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:08:50,176 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:08:50,176 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 08:08:50,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:50 BoogieIcfgContainer [2021-10-13 08:08:50,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:08:50,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:08:50,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:08:50,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:08:50,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:08:49" (1/3) ... [2021-10-13 08:08:50,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@769445e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:50, skipping insertion in model container [2021-10-13 08:08:50,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:49" (2/3) ... [2021-10-13 08:08:50,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@769445e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:50, skipping insertion in model container [2021-10-13 08:08:50,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:50" (3/3) ... [2021-10-13 08:08:50,187 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2021-10-13 08:08:50,193 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:08:50,193 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:08:50,305 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:08:50,312 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 08:08:50,312 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:08:50,326 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:50,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 08:08:50,331 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:50,331 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 08:08:50,332 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:50,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:50,338 INFO L82 PathProgramCache]: Analyzing trace with hash 889646744, now seen corresponding path program 1 times [2021-10-13 08:08:50,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:50,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154553615] [2021-10-13 08:08:50,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:50,355 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:50,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:50,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:50,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:08:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:50,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:08:50,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:50,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:50,623 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:50,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154553615] [2021-10-13 08:08:50,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154553615] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:50,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:50,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 08:08:50,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457169738] [2021-10-13 08:08:50,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:08:50,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:50,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:08:50,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:50,657 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:50,707 INFO L93 Difference]: Finished difference Result 26 states and 40 transitions. [2021-10-13 08:08:50,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:08:50,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 08:08:50,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:50,722 INFO L225 Difference]: With dead ends: 26 [2021-10-13 08:08:50,722 INFO L226 Difference]: Without dead ends: 13 [2021-10-13 08:08:50,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:50,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-13 08:08:50,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-13 08:08:50,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-10-13 08:08:50,760 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 6 [2021-10-13 08:08:50,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:50,761 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-10-13 08:08:50,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:50,762 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-10-13 08:08:50,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 08:08:50,763 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:50,763 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:50,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:50,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:50,996 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:50,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:50,997 INFO L82 PathProgramCache]: Analyzing trace with hash 659737272, now seen corresponding path program 1 times [2021-10-13 08:08:50,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:50,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70974287] [2021-10-13 08:08:50,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:50,998 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:50,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:51,001 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:51,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:08:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:51,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:08:51,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:08:51,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:08:51,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:51,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70974287] [2021-10-13 08:08:51,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70974287] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:51,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:51,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 08:08:51,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870468094] [2021-10-13 08:08:51,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:08:51,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:51,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:08:51,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:51,221 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:51,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:51,251 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2021-10-13 08:08:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:08:51,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 12 [2021-10-13 08:08:51,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:51,253 INFO L225 Difference]: With dead ends: 26 [2021-10-13 08:08:51,253 INFO L226 Difference]: Without dead ends: 17 [2021-10-13 08:08:51,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:51,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-13 08:08:51,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-13 08:08:51,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:51,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-13 08:08:51,260 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-10-13 08:08:51,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:51,261 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-13 08:08:51,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:51,261 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-13 08:08:51,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 08:08:51,262 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:51,262 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:51,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:51,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:51,474 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:51,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:51,475 INFO L82 PathProgramCache]: Analyzing trace with hash 311415160, now seen corresponding path program 1 times [2021-10-13 08:08:51,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:51,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316398329] [2021-10-13 08:08:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:51,476 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:51,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:51,477 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:51,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:08:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:51,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:08:51,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 08:08:51,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 08:08:51,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:51,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316398329] [2021-10-13 08:08:51,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316398329] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:08:51,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1829966084] [2021-10-13 08:08:51,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:51,705 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:08:51,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:08:51,718 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:08:51,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 08:08:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:51,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:08:51,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 08:08:51,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 08:08:52,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1829966084] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:08:52,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946230237] [2021-10-13 08:08:52,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:52,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:08:52,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:08:52,053 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:08:52,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 08:08:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:52,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:08:52,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 08:08:52,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 08:08:52,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946230237] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:08:52,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:08:52,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 15 [2021-10-13 08:08:52,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923492550] [2021-10-13 08:08:52,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 08:08:52,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:52,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 08:08:52,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-10-13 08:08:52,567 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:53,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:53,975 INFO L93 Difference]: Finished difference Result 72 states and 107 transitions. [2021-10-13 08:08:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-13 08:08:53,976 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 08:08:53,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:53,977 INFO L225 Difference]: With dead ends: 72 [2021-10-13 08:08:53,977 INFO L226 Difference]: Without dead ends: 61 [2021-10-13 08:08:53,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1254.8ms TimeCoverageRelationStatistics Valid=759, Invalid=2103, Unknown=0, NotChecked=0, Total=2862 [2021-10-13 08:08:53,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-13 08:08:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-10-13 08:08:53,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:53,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2021-10-13 08:08:53,994 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 16 [2021-10-13 08:08:53,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:53,994 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2021-10-13 08:08:53,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:53,995 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2021-10-13 08:08:53,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-13 08:08:53,997 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:53,997 INFO L512 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:54,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:54,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-13 08:08:54,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:54,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:08:54,604 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:54,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:54,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1100859320, now seen corresponding path program 2 times [2021-10-13 08:08:54,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:54,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428337758] [2021-10-13 08:08:54,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:08:54,606 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:54,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:54,617 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:54,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 08:08:54,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:08:54,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:08:54,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:08:54,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-10-13 08:08:54,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-10-13 08:08:55,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:55,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428337758] [2021-10-13 08:08:55,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428337758] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:08:55,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [932464878] [2021-10-13 08:08:55,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:08:55,282 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:08:55,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:08:55,283 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:08:55,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 08:08:55,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:08:55,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:08:55,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:08:55,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-10-13 08:08:55,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-10-13 08:08:55,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [932464878] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:08:55,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694242625] [2021-10-13 08:08:55,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:08:55,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:08:55,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:08:55,913 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:08:55,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 08:08:56,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:08:56,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:08:56,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 08:08:56,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 771 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-13 08:08:56,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2021-10-13 08:08:56,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694242625] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 08:08:56,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 08:08:56,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 9, 9, 9, 9] total 27 [2021-10-13 08:08:56,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504302172] [2021-10-13 08:08:56,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:08:56,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:56,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:08:56,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-10-13 08:08:56,899 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:57,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:57,006 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-10-13 08:08:57,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:08:57,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 60 [2021-10-13 08:08:57,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:57,007 INFO L225 Difference]: With dead ends: 61 [2021-10-13 08:08:57,008 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 08:08:57,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 486.6ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-10-13 08:08:57,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 08:08:57,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 08:08:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:57,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 08:08:57,010 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 60 [2021-10-13 08:08:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:57,010 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 08:08:57,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 08:08:57,011 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 08:08:57,013 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:08:57,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:57,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-13 08:08:57,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:57,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:08:57,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 08:08:57,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:08:57,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:08:57,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:08:57,891 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 08:08:57,891 INFO L853 garLoopResultBuilder]: At program point L19-2(lines 19 21) the Hoare annotation is: (bvult ULTIMATE.start_main_~x~0 (_ bv268435455 32)) [2021-10-13 08:08:57,891 INFO L857 garLoopResultBuilder]: For program point L19-3(lines 19 21) no Hoare annotation was computed. [2021-10-13 08:08:57,892 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-10-13 08:08:57,893 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 08:08:57,893 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 08:08:57,893 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 08:08:57,893 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-10-13 08:08:57,894 INFO L853 garLoopResultBuilder]: At program point L16-2(lines 16 24) the Hoare annotation is: (or (not (= (bvurem ULTIMATE.start_main_~x~0 (_ bv2 32)) (_ bv0 32))) (bvult ULTIMATE.start_main_~x~0 (_ bv268435455 32))) [2021-10-13 08:08:57,894 INFO L857 garLoopResultBuilder]: For program point L16-3(lines 16 24) no Hoare annotation was computed. [2021-10-13 08:08:57,894 INFO L857 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-10-13 08:08:57,894 INFO L860 garLoopResultBuilder]: At program point L6-2(lines 1 27) the Hoare annotation is: true [2021-10-13 08:08:57,899 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:08:57,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:08:57 BoogieIcfgContainer [2021-10-13 08:08:57,914 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:08:57,915 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:08:57,915 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:08:57,916 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:08:57,916 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:50" (3/4) ... [2021-10-13 08:08:57,922 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 08:08:57,934 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-13 08:08:57,934 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 08:08:57,935 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 08:08:57,935 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 08:08:57,983 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 08:08:57,983 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:08:57,985 INFO L168 Benchmark]: Toolchain (without parser) took 8668.95 ms. Allocated memory was 62.9 MB in the beginning and 100.7 MB in the end (delta: 37.7 MB). Free memory was 43.1 MB in the beginning and 56.5 MB in the end (delta: -13.3 MB). Peak memory consumption was 27.0 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:57,985 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 62.9 MB. Free memory is still 43.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:08:57,986 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.16 ms. Allocated memory is still 62.9 MB. Free memory was 43.0 MB in the beginning and 33.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:57,986 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.45 ms. Allocated memory is still 62.9 MB. Free memory was 33.3 MB in the beginning and 32.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:08:57,987 INFO L168 Benchmark]: Boogie Preprocessor took 54.65 ms. Allocated memory is still 62.9 MB. Free memory was 31.8 MB in the beginning and 30.8 MB in the end (delta: 998.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:57,987 INFO L168 Benchmark]: RCFGBuilder took 436.63 ms. Allocated memory is still 62.9 MB. Free memory was 30.7 MB in the beginning and 42.8 MB in the end (delta: -12.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:57,988 INFO L168 Benchmark]: TraceAbstraction took 7734.05 ms. Allocated memory was 62.9 MB in the beginning and 100.7 MB in the end (delta: 37.7 MB). Free memory was 42.3 MB in the beginning and 59.3 MB in the end (delta: -17.1 MB). Peak memory consumption was 18.8 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:57,988 INFO L168 Benchmark]: Witness Printer took 68.09 ms. Allocated memory is still 100.7 MB. Free memory was 59.3 MB in the beginning and 56.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:57,991 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 62.9 MB. Free memory is still 43.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 325.16 ms. Allocated memory is still 62.9 MB. Free memory was 43.0 MB in the beginning and 33.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.45 ms. Allocated memory is still 62.9 MB. Free memory was 33.3 MB in the beginning and 32.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.65 ms. Allocated memory is still 62.9 MB. Free memory was 31.8 MB in the beginning and 30.8 MB in the end (delta: 998.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 436.63 ms. Allocated memory is still 62.9 MB. Free memory was 30.7 MB in the beginning and 42.8 MB in the end (delta: -12.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7734.05 ms. Allocated memory was 62.9 MB in the beginning and 100.7 MB in the end (delta: 37.7 MB). Free memory was 42.3 MB in the beginning and 59.3 MB in the end (delta: -17.1 MB). Peak memory consumption was 18.8 MB. Max. memory is 16.1 GB. * Witness Printer took 68.09 ms. Allocated memory is still 100.7 MB. Free memory was 59.3 MB in the beginning and 56.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: 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: 7595.6ms, OverallIterations: 4, TraceHistogramMax: 36, EmptinessCheckTime: 12.4ms, AutomataDifference: 1654.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 268.3ms, InitialAbstractionConstructionTime: 9.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 32 SDtfs, 52 SDslu, 58 SDs, 0 SdLazy, 150 SolverSat, 122 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 277.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 518 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1763.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=3, InterpolantAutomatonStates: 59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 39.2ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 53 NumberOfFragments, 14 HoareAnnotationTreeSize, 3 FomulaSimplifications, 1343 FormulaSimplificationTreeSizeReduction, 217.7ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 243 FormulaSimplificationTreeSizeReductionInter, 44.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 107.6ms SsaConstructionTime, 434.5ms SatisfiabilityAnalysisTime, 2627.8ms InterpolantComputationTime, 246 NumberOfCodeBlocks, 246 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 476 ConstructedInterpolants, 0 QuantifiedInterpolants, 931 SizeOfPredicates, 7 NumberOfNonLiveVariables, 568 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 16 InterpolantComputations, 5 PerfectInterpolantSequences, 4613/5506 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: 19]: Loop Invariant Derived loop invariant: NULL - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: !(~bvurem32(x, 2bv32) == 0bv32) || ~bvult32(x, 268435455bv32) RESULT: Ultimate proved your program to be correct! [2021-10-13 08:08:58,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7626510b-01c5-44d0-a89d-9b5e251ac6ba/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...