./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/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_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum05.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/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_2d328ae3-fc81-45be-81fc-0bf39b542ebd/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 0bbcd29b379466a58e055ac550736cd77ce56d9c ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/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_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum05.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/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_2d328ae3-fc81-45be-81fc-0bf39b542ebd/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 0bbcd29b379466a58e055ac550736cd77ce56d9c .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:29:34,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:29:34,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:29:34,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:29:34,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:29:34,105 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:29:34,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:29:34,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:29:34,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:29:34,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:29:34,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:29:34,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:29:34,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:29:34,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:29:34,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:29:34,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:29:34,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:29:34,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:29:34,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:29:34,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:29:34,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:29:34,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:29:34,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:29:34,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:29:34,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:29:34,160 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:29:34,161 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:29:34,161 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:29:34,162 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:29:34,163 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:29:34,163 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:29:34,164 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:29:34,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:29:34,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:29:34,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:29:34,167 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:29:34,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:29:34,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:29:34,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:29:34,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:29:34,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:29:34,171 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:29:34,200 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:29:34,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:29:34,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:29:34,201 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:29:34,201 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:29:34,201 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:29:34,202 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:29:34,202 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:29:34,202 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:29:34,202 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:29:34,202 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:29:34,203 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:29:34,203 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:29:34,203 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:29:34,203 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:29:34,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:29:34,204 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:29:34,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:29:34,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:29:34,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:29:34,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:29:34,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:29:34,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:29:34,205 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:29:34,206 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:29:34,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:29:34,206 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:29:34,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:29:34,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:29:34,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:29:34,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:29:34,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:29:34,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:29:34,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:29:34,208 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:29:34,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:29:34,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:29:34,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:29:34,209 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:29:34,209 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_2d328ae3-fc81-45be-81fc-0bf39b542ebd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bbcd29b379466a58e055ac550736cd77ce56d9c [2021-10-13 07:29:34,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:29:34,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:29:34,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:29:34,495 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:29:34,496 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:29:34,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-10-13 07:29:34,569 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/data/08afc30e1/fb6a9005b62b407784a05864dcaf9783/FLAGd5e3ab83d [2021-10-13 07:29:35,024 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:29:35,025 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-10-13 07:29:35,037 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/data/08afc30e1/fb6a9005b62b407784a05864dcaf9783/FLAGd5e3ab83d [2021-10-13 07:29:35,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/data/08afc30e1/fb6a9005b62b407784a05864dcaf9783 [2021-10-13 07:29:35,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:29:35,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:29:35,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:29:35,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:29:35,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:29:35,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:29:35" (1/1) ... [2021-10-13 07:29:35,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ffa1a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:35, skipping insertion in model container [2021-10-13 07:29:35,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:29:35" (1/1) ... [2021-10-13 07:29:35,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:29:35,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:29:35,630 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_2d328ae3-fc81-45be-81fc-0bf39b542ebd/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2021-10-13 07:29:35,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:29:35,639 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:29:35,680 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_2d328ae3-fc81-45be-81fc-0bf39b542ebd/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2021-10-13 07:29:35,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:29:35,696 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:29:35,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:35 WrapperNode [2021-10-13 07:29:35,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:29:35,699 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:29:35,699 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:29:35,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:29:35,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:35" (1/1) ... [2021-10-13 07:29:35,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:35" (1/1) ... [2021-10-13 07:29:35,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:29:35,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:29:35,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:29:35,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:29:35,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:35" (1/1) ... [2021-10-13 07:29:35,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:35" (1/1) ... [2021-10-13 07:29:35,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:35" (1/1) ... [2021-10-13 07:29:35,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:35" (1/1) ... [2021-10-13 07:29:35,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:35" (1/1) ... [2021-10-13 07:29:35,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:35" (1/1) ... [2021-10-13 07:29:35,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:35" (1/1) ... [2021-10-13 07:29:35,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:29:35,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:29:35,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:29:35,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:29:35,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:35" (1/1) ... [2021-10-13 07:29:35,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:29:35,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:29:35,851 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:29:35,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:29:35,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:29:35,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:29:35,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:29:35,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:29:35,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:29:35,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:29:35,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:29:36,497 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:29:36,498 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-13 07:29:36,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:29:36 BoogieIcfgContainer [2021-10-13 07:29:36,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:29:36,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:29:36,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:29:36,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:29:36,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:29:35" (1/3) ... [2021-10-13 07:29:36,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f10b06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:29:36, skipping insertion in model container [2021-10-13 07:29:36,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:35" (2/3) ... [2021-10-13 07:29:36,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f10b06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:29:36, skipping insertion in model container [2021-10-13 07:29:36,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:29:36" (3/3) ... [2021-10-13 07:29:36,514 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2021-10-13 07:29:36,521 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:29:36,521 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:29:36,587 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:29:36,594 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 07:29:36,594 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:29:36,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 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 07:29:36,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:29:36,632 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:29:36,632 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:29:36,633 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:29:36,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:29:36,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1624531970, now seen corresponding path program 1 times [2021-10-13 07:29:36,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:29:36,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836915417] [2021-10-13 07:29:36,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:36,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:29:36,756 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:29:36,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903209883] [2021-10-13 07:29:36,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:36,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:29:36,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:29:36,764 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:29:36,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:29:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:36,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:29:36,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:29:36,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:29:36,942 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:29:36,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836915417] [2021-10-13 07:29:36,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:29:36,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903209883] [2021-10-13 07:29:36,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903209883] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:29:36,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:29:36,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 07:29:36,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521799013] [2021-10-13 07:29:36,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:29:36,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:29:36,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:29:36,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:29:36,967 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 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 2.5) internal successors, (10), 3 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 07:29:36,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:29:36,991 INFO L93 Difference]: Finished difference Result 22 states and 33 transitions. [2021-10-13 07:29:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:29:36,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) Word has length 8 [2021-10-13 07:29:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:29:37,000 INFO L225 Difference]: With dead ends: 22 [2021-10-13 07:29:37,001 INFO L226 Difference]: Without dead ends: 11 [2021-10-13 07:29:37,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:29:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-13 07:29:37,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-13 07:29:37,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:37,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2021-10-13 07:29:37,034 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 8 [2021-10-13 07:29:37,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:29:37,035 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2021-10-13 07:29:37,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 07:29:37,035 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2021-10-13 07:29:37,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:29:37,036 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:29:37,036 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:29:37,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:37,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:29:37,253 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:29:37,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:29:37,253 INFO L82 PathProgramCache]: Analyzing trace with hash -132988094, now seen corresponding path program 1 times [2021-10-13 07:29:37,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:29:37,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106448574] [2021-10-13 07:29:37,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:37,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:29:37,320 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:29:37,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [363129145] [2021-10-13 07:29:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:37,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:29:37,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:29:37,331 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:29:37,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 07:29:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:37,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:29:37,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:29:37,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:29:37,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:29:37,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106448574] [2021-10-13 07:29:37,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:29:37,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363129145] [2021-10-13 07:29:37,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363129145] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:29:37,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:29:37,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:29:37,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894336997] [2021-10-13 07:29:37,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:29:37,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:29:37,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:29:37,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:29:37,505 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:37,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:29:37,541 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2021-10-13 07:29:37,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:29:37,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 07:29:37,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:29:37,543 INFO L225 Difference]: With dead ends: 23 [2021-10-13 07:29:37,543 INFO L226 Difference]: Without dead ends: 17 [2021-10-13 07:29:37,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:29:37,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-13 07:29:37,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-13 07:29:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-10-13 07:29:37,548 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2021-10-13 07:29:37,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:29:37,548 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-10-13 07:29:37,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:37,549 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-10-13 07:29:37,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:29:37,550 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:29:37,550 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:29:37,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:37,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-13 07:29:37,776 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:29:37,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:29:37,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1151414046, now seen corresponding path program 1 times [2021-10-13 07:29:37,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:29:37,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047348132] [2021-10-13 07:29:37,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:37,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:29:37,836 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:29:37,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241803481] [2021-10-13 07:29:37,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:37,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:29:37,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:29:37,838 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:29:37,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 07:29:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:37,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:29:37,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 07:29:37,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 07:29:38,030 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:29:38,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047348132] [2021-10-13 07:29:38,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:29:38,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241803481] [2021-10-13 07:29:38,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241803481] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:29:38,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:29:38,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:29:38,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252935825] [2021-10-13 07:29:38,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:29:38,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:29:38,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:29:38,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:29:38,037 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 07:29:38,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:29:38,058 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-10-13 07:29:38,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:29:38,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 16 [2021-10-13 07:29:38,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:29:38,059 INFO L225 Difference]: With dead ends: 25 [2021-10-13 07:29:38,060 INFO L226 Difference]: Without dead ends: 19 [2021-10-13 07:29:38,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:29:38,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-13 07:29:38,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-13 07:29:38,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:38,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-13 07:29:38,075 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 16 [2021-10-13 07:29:38,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:29:38,075 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-13 07:29:38,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 07:29:38,078 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-13 07:29:38,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:29:38,079 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:29:38,079 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:29:38,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:38,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:29:38,289 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:29:38,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:29:38,290 INFO L82 PathProgramCache]: Analyzing trace with hash 2095232066, now seen corresponding path program 1 times [2021-10-13 07:29:38,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:29:38,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989111311] [2021-10-13 07:29:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:38,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:29:38,323 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:29:38,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091268855] [2021-10-13 07:29:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:38,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:29:38,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:29:38,329 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:29:38,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 07:29:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:38,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:29:38,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 07:29:38,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 07:29:38,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:29:38,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989111311] [2021-10-13 07:29:38,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:29:38,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091268855] [2021-10-13 07:29:38,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091268855] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:29:38,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [638250948] [2021-10-13 07:29:38,600 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-13 07:29:38,600 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:29:38,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:29:38,613 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:29:38,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:29:38,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:38,664 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:29:38,666 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:38,666 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:29:38,667 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:29:38,668 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:38,669 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:29:38,675 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-10-13 07:29:38,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:29:38,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:29:38,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:29:38,721 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 07:29:38,722 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:38,724 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:29:38,727 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:38,733 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:29:38,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:29:38,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:29:38,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:38,777 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:38,783 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-10-13 07:29:38,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:29:38,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:131, output treesize:134 [2021-10-13 07:29:38,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-13 07:29:39,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:29:39,005 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_23| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:29:39,009 INFO L168 Benchmark]: Toolchain (without parser) took 3608.40 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 77.1 MB in the beginning and 74.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 26.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:29:39,009 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 109.1 MB. Free memory is still 61.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:29:39,010 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.58 ms. Allocated memory is still 109.1 MB. Free memory was 76.8 MB in the beginning and 82.2 MB in the end (delta: -5.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:29:39,010 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.45 ms. Allocated memory is still 109.1 MB. Free memory was 82.2 MB in the beginning and 80.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:29:39,011 INFO L168 Benchmark]: Boogie Preprocessor took 43.38 ms. Allocated memory is still 109.1 MB. Free memory was 80.1 MB in the beginning and 78.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:29:39,011 INFO L168 Benchmark]: RCFGBuilder took 684.54 ms. Allocated memory is still 109.1 MB. Free memory was 78.9 MB in the beginning and 57.9 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:29:39,012 INFO L168 Benchmark]: TraceAbstraction took 2502.59 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 57.0 MB in the beginning and 74.3 MB in the end (delta: -17.2 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:29:39,015 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 109.1 MB. Free memory is still 61.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 295.58 ms. Allocated memory is still 109.1 MB. Free memory was 76.8 MB in the beginning and 82.2 MB in the end (delta: -5.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 61.45 ms. Allocated memory is still 109.1 MB. Free memory was 82.2 MB in the beginning and 80.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.38 ms. Allocated memory is still 109.1 MB. Free memory was 80.1 MB in the beginning and 78.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 684.54 ms. Allocated memory is still 109.1 MB. Free memory was 78.9 MB in the beginning and 57.9 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2502.59 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 57.0 MB in the beginning and 74.3 MB in the end (delta: -17.2 MB). Peak memory consumption was 8.3 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_23| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_23|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:29:39,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:29:41,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:29:41,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:29:41,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:29:41,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:29:41,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:29:41,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:29:41,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:29:41,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:29:41,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:29:41,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:29:41,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:29:41,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:29:41,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:29:41,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:29:41,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:29:41,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:29:41,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:29:41,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:29:41,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:29:41,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:29:41,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:29:41,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:29:41,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:29:41,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:29:41,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:29:41,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:29:41,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:29:41,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:29:41,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:29:41,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:29:41,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:29:41,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:29:41,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:29:41,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:29:41,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:29:41,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:29:41,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:29:41,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:29:41,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:29:41,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:29:41,518 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:29:41,557 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:29:41,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:29:41,559 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:29:41,559 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:29:41,560 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:29:41,560 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:29:41,560 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:29:41,560 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:29:41,561 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:29:41,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:29:41,564 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:29:41,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:29:41,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:29:41,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:29:41,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:29:41,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:29:41,565 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:29:41,565 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:29:41,566 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:29:41,566 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:29:41,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:29:41,566 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:29:41,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:29:41,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:29:41,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:29:41,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:29:41,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:29:41,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:29:41,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:29:41,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:29:41,569 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:29:41,569 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:29:41,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:29:41,569 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:29:41,570 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:29:41,570 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_2d328ae3-fc81-45be-81fc-0bf39b542ebd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bbcd29b379466a58e055ac550736cd77ce56d9c [2021-10-13 07:29:41,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:29:42,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:29:42,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:29:42,016 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:29:42,017 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:29:42,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-10-13 07:29:42,109 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/data/bc208361c/fba7a88c886c490894328ee4d69d11f0/FLAG22b3363d9 [2021-10-13 07:29:42,714 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:29:42,715 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-10-13 07:29:42,723 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/data/bc208361c/fba7a88c886c490894328ee4d69d11f0/FLAG22b3363d9 [2021-10-13 07:29:43,047 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/data/bc208361c/fba7a88c886c490894328ee4d69d11f0 [2021-10-13 07:29:43,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:29:43,067 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:29:43,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:29:43,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:29:43,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:29:43,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:29:43" (1/1) ... [2021-10-13 07:29:43,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cdfbbf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:43, skipping insertion in model container [2021-10-13 07:29:43,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:29:43" (1/1) ... [2021-10-13 07:29:43,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:29:43,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:29:43,320 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_2d328ae3-fc81-45be-81fc-0bf39b542ebd/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2021-10-13 07:29:43,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:29:43,346 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:29:43,415 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_2d328ae3-fc81-45be-81fc-0bf39b542ebd/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2021-10-13 07:29:43,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:29:43,442 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:29:43,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:43 WrapperNode [2021-10-13 07:29:43,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:29:43,444 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:29:43,444 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:29:43,444 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:29:43,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:43" (1/1) ... [2021-10-13 07:29:43,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:43" (1/1) ... [2021-10-13 07:29:43,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:29:43,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:29:43,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:29:43,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:29:43,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:43" (1/1) ... [2021-10-13 07:29:43,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:43" (1/1) ... [2021-10-13 07:29:43,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:43" (1/1) ... [2021-10-13 07:29:43,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:43" (1/1) ... [2021-10-13 07:29:43,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:43" (1/1) ... [2021-10-13 07:29:43,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:43" (1/1) ... [2021-10-13 07:29:43,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:43" (1/1) ... [2021-10-13 07:29:43,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:29:43,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:29:43,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:29:43,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:29:43,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:43" (1/1) ... [2021-10-13 07:29:43,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:29:43,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:29:43,618 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:29:43,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:29:43,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:29:43,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:29:43,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:29:43,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:29:43,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:29:43,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:29:43,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:29:44,734 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:29:44,735 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-13 07:29:44,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:29:44 BoogieIcfgContainer [2021-10-13 07:29:44,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:29:44,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:29:44,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:29:44,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:29:44,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:29:43" (1/3) ... [2021-10-13 07:29:44,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43914e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:29:44, skipping insertion in model container [2021-10-13 07:29:44,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:29:43" (2/3) ... [2021-10-13 07:29:44,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43914e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:29:44, skipping insertion in model container [2021-10-13 07:29:44,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:29:44" (3/3) ... [2021-10-13 07:29:44,745 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2021-10-13 07:29:44,750 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:29:44,750 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:29:44,804 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:29:44,811 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 07:29:44,811 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:29:44,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:44,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 07:29:44,835 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:29:44,836 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:29:44,836 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:29:44,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:29:44,842 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2021-10-13 07:29:44,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:29:44,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421901814] [2021-10-13 07:29:44,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:44,856 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:29:44,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:29:44,859 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:29:44,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:29:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:45,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:29:45,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:29:45,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:29:45,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:29:45,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421901814] [2021-10-13 07:29:45,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421901814] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:29:45,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:29:45,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:29:45,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832162410] [2021-10-13 07:29:45,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:29:45,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:29:45,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:29:45,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:29:45,461 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:45,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:29:45,477 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2021-10-13 07:29:45,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:29:45,479 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 07:29:45,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:29:45,486 INFO L225 Difference]: With dead ends: 56 [2021-10-13 07:29:45,487 INFO L226 Difference]: Without dead ends: 26 [2021-10-13 07:29:45,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:29:45,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-13 07:29:45,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-13 07:29:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-10-13 07:29:45,520 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2021-10-13 07:29:45,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:29:45,521 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-10-13 07:29:45,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:45,521 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-10-13 07:29:45,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 07:29:45,522 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:29:45,522 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:29:45,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:45,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:29:45,741 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:29:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:29:45,741 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2021-10-13 07:29:45,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:29:45,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648288453] [2021-10-13 07:29:45,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:45,743 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:29:45,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:29:45,744 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:29:45,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:29:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:46,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:29:46,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:29:46,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:29:46,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:29:46,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648288453] [2021-10-13 07:29:46,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648288453] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:29:46,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:29:46,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:29:46,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714544834] [2021-10-13 07:29:46,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:29:46,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:29:46,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:29:46,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:29:46,228 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:46,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:29:46,270 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2021-10-13 07:29:46,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:29:46,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) Word has length 17 [2021-10-13 07:29:46,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:29:46,274 INFO L225 Difference]: With dead ends: 51 [2021-10-13 07:29:46,274 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 07:29:46,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:29:46,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 07:29:46,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-13 07:29:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-10-13 07:29:46,295 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 17 [2021-10-13 07:29:46,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:29:46,295 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-10-13 07:29:46,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-10-13 07:29:46,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 07:29:46,297 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:29:46,297 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:29:46,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:46,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:29:46,498 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:29:46,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:29:46,499 INFO L82 PathProgramCache]: Analyzing trace with hash -790773651, now seen corresponding path program 1 times [2021-10-13 07:29:46,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:29:46,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018780481] [2021-10-13 07:29:46,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:46,500 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:29:46,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:29:46,501 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:29:46,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:29:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:46,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:29:46,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:29:46,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:29:47,136 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:29:47,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018780481] [2021-10-13 07:29:47,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018780481] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:29:47,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [820975977] [2021-10-13 07:29:47,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:47,137 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:29:47,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:29:47,153 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:29:47,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 07:29:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:47,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:29:47,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:29:47,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:29:47,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [820975977] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:29:47,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-13 07:29:47,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-10-13 07:29:47,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362967973] [2021-10-13 07:29:47,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:29:47,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:29:47,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:29:47,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:29:47,460 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:47,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:29:47,854 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2021-10-13 07:29:47,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:29:47,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) Word has length 21 [2021-10-13 07:29:47,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:29:47,857 INFO L225 Difference]: With dead ends: 67 [2021-10-13 07:29:47,857 INFO L226 Difference]: Without dead ends: 50 [2021-10-13 07:29:47,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:29:47,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-13 07:29:47,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-10-13 07:29:47,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:47,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 57 transitions. [2021-10-13 07:29:47,866 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 57 transitions. Word has length 21 [2021-10-13 07:29:47,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:29:47,867 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 57 transitions. [2021-10-13 07:29:47,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:47,867 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 57 transitions. [2021-10-13 07:29:47,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 07:29:47,868 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:29:47,868 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:29:47,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:48,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:48,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:29:48,271 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:29:48,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:29:48,271 INFO L82 PathProgramCache]: Analyzing trace with hash -532548631, now seen corresponding path program 1 times [2021-10-13 07:29:48,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:29:48,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352392026] [2021-10-13 07:29:48,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:48,273 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:29:48,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:29:48,274 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:29:48,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:29:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:48,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:29:48,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:29:48,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:29:48,665 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:29:48,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352392026] [2021-10-13 07:29:48,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352392026] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:29:48,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [263533807] [2021-10-13 07:29:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:48,666 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:29:48,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:29:48,667 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:29:48,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 07:29:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:48,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:29:48,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:29:48,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:29:49,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [263533807] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:29:49,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428633502] [2021-10-13 07:29:49,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:49,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:29:49,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:29:49,018 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:29:49,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 07:29:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:49,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:29:49,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:29:49,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:29:49,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428633502] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:29:49,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:29:49,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5, 5, 5] total 16 [2021-10-13 07:29:49,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272245055] [2021-10-13 07:29:49,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:29:49,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:29:49,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:29:49,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:29:49,764 INFO L87 Difference]: Start difference. First operand 41 states and 57 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:50,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:29:50,343 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2021-10-13 07:29:50,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:29:50,345 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 07:29:50,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:29:50,346 INFO L225 Difference]: With dead ends: 98 [2021-10-13 07:29:50,347 INFO L226 Difference]: Without dead ends: 93 [2021-10-13 07:29:50,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 373.7ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-10-13 07:29:50,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-13 07:29:50,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2021-10-13 07:29:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 60 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:50,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 86 transitions. [2021-10-13 07:29:50,358 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 86 transitions. Word has length 21 [2021-10-13 07:29:50,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:29:50,358 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 86 transitions. [2021-10-13 07:29:50,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:50,359 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 86 transitions. [2021-10-13 07:29:50,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 07:29:50,360 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:29:50,360 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:29:50,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:50,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:50,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:50,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:29:50,969 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:29:50,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:29:50,970 INFO L82 PathProgramCache]: Analyzing trace with hash -781348630, now seen corresponding path program 1 times [2021-10-13 07:29:50,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:29:50,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236965397] [2021-10-13 07:29:50,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:50,971 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:29:50,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:29:50,977 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:29:50,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:29:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:51,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:29:51,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:51,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:29:51,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:29:51,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:29:51,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236965397] [2021-10-13 07:29:51,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236965397] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:29:51,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [254066168] [2021-10-13 07:29:51,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:51,486 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:29:51,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:29:51,489 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:29:51,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-13 07:29:52,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:52,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:29:52,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:29:52,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:29:52,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [254066168] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:29:52,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110051458] [2021-10-13 07:29:52,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:52,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:29:52,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:29:52,199 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:29:52,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 07:29:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:52,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:29:52,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 07:29:52,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 07:29:52,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110051458] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:29:52,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:29:52,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5, 5, 5] total 10 [2021-10-13 07:29:52,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240544469] [2021-10-13 07:29:52,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:29:52,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:29:52,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:29:52,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:29:52,748 INFO L87 Difference]: Start difference. First operand 61 states and 86 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:52,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:29:52,860 INFO L93 Difference]: Finished difference Result 131 states and 191 transitions. [2021-10-13 07:29:52,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:29:52,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-10-13 07:29:52,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:29:52,867 INFO L225 Difference]: With dead ends: 131 [2021-10-13 07:29:52,867 INFO L226 Difference]: Without dead ends: 81 [2021-10-13 07:29:52,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:29:52,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-13 07:29:52,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-10-13 07:29:52,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 78 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:52,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2021-10-13 07:29:52,879 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 24 [2021-10-13 07:29:52,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:29:52,879 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2021-10-13 07:29:52,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:52,880 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2021-10-13 07:29:52,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-13 07:29:52,881 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:29:52,882 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:29:52,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:53,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:53,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:53,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:29:53,505 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:29:53,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:29:53,505 INFO L82 PathProgramCache]: Analyzing trace with hash -358269621, now seen corresponding path program 1 times [2021-10-13 07:29:53,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:29:53,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144101105] [2021-10-13 07:29:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:53,506 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:29:53,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:29:53,508 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:29:53,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 07:29:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:53,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:29:53,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 07:29:54,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:54,242 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 07:29:54,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:29:54,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144101105] [2021-10-13 07:29:54,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144101105] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:29:54,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1013783616] [2021-10-13 07:29:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:54,243 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:29:54,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:29:54,248 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:29:54,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 07:29:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:54,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:29:54,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:29:54,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:29:54,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1013783616] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:29:54,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991774414] [2021-10-13 07:29:54,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:54,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:29:54,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:29:54,834 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:29:54,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 07:29:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:55,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:29:55,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:29:55,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:29:55,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991774414] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:29:55,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:29:55,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4, 4, 4, 4] total 12 [2021-10-13 07:29:55,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241080174] [2021-10-13 07:29:55,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 07:29:55,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:29:55,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 07:29:55,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:29:55,742 INFO L87 Difference]: Start difference. First operand 79 states and 104 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:57,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:29:57,247 INFO L93 Difference]: Finished difference Result 243 states and 337 transitions. [2021-10-13 07:29:57,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:29:57,248 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 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 39 [2021-10-13 07:29:57,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:29:57,250 INFO L225 Difference]: With dead ends: 243 [2021-10-13 07:29:57,250 INFO L226 Difference]: Without dead ends: 171 [2021-10-13 07:29:57,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:29:57,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-13 07:29:57,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 123. [2021-10-13 07:29:57,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.4098360655737705) internal successors, (172), 122 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:57,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 172 transitions. [2021-10-13 07:29:57,265 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 172 transitions. Word has length 39 [2021-10-13 07:29:57,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:29:57,266 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 172 transitions. [2021-10-13 07:29:57,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:57,266 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 172 transitions. [2021-10-13 07:29:57,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-13 07:29:57,268 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:29:57,269 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:29:57,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:57,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:57,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-10-13 07:29:57,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:29:57,871 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:29:57,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:29:57,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1487247229, now seen corresponding path program 1 times [2021-10-13 07:29:57,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:29:57,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471109309] [2021-10-13 07:29:57,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:57,872 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:29:57,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:29:57,874 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:29:57,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 07:29:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:58,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:29:58,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-13 07:29:58,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-13 07:29:58,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:29:58,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471109309] [2021-10-13 07:29:58,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [471109309] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:29:58,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1370807166] [2021-10-13 07:29:58,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:58,678 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:29:58,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:29:58,678 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:29:58,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-13 07:29:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:59,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:29:59,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-13 07:30:00,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-13 07:30:00,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1370807166] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:30:00,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188879262] [2021-10-13 07:30:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:00,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:30:00,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:30:00,235 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:30:00,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 07:30:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:01,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:30:01,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-13 07:30:01,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-13 07:30:01,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188879262] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:30:01,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:30:01,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4, 4, 4, 4] total 8 [2021-10-13 07:30:01,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077298100] [2021-10-13 07:30:01,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:30:01,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:30:01,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:30:01,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:30:01,378 INFO L87 Difference]: Start difference. First operand 123 states and 172 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:01,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:01,407 INFO L93 Difference]: Finished difference Result 165 states and 231 transitions. [2021-10-13 07:30:01,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:30:01,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-10-13 07:30:01,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:01,411 INFO L225 Difference]: With dead ends: 165 [2021-10-13 07:30:01,411 INFO L226 Difference]: Without dead ends: 129 [2021-10-13 07:30:01,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:30:01,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-13 07:30:01,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-10-13 07:30:01,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.390625) internal successors, (178), 128 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:01,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 178 transitions. [2021-10-13 07:30:01,440 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 178 transitions. Word has length 45 [2021-10-13 07:30:01,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:01,442 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 178 transitions. [2021-10-13 07:30:01,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:01,442 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 178 transitions. [2021-10-13 07:30:01,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-13 07:30:01,447 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:01,447 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:30:01,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:01,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:01,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-10-13 07:30:02,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:30:02,058 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:02,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:02,059 INFO L82 PathProgramCache]: Analyzing trace with hash -34042881, now seen corresponding path program 1 times [2021-10-13 07:30:02,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:30:02,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167442799] [2021-10-13 07:30:02,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:02,060 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:30:02,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:30:02,062 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:30:02,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 07:30:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:02,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:30:02,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-13 07:30:02,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-13 07:30:02,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:30:02,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167442799] [2021-10-13 07:30:02,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167442799] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:30:02,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [132564512] [2021-10-13 07:30:02,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:02,918 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:30:02,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:30:02,919 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:30:02,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-13 07:30:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:04,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:30:04,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-13 07:30:04,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-13 07:30:04,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [132564512] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:30:04,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227933232] [2021-10-13 07:30:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:04,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:30:04,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:30:04,593 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:30:04,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 07:30:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:05,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:30:05,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-13 07:30:05,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-13 07:30:05,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227933232] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:30:05,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:30:05,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 5] total 8 [2021-10-13 07:30:05,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857268962] [2021-10-13 07:30:05,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:30:05,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:30:05,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:30:05,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:30:05,930 INFO L87 Difference]: Start difference. First operand 129 states and 178 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:06,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:06,160 INFO L93 Difference]: Finished difference Result 276 states and 385 transitions. [2021-10-13 07:30:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:30:06,161 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 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 49 [2021-10-13 07:30:06,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:06,162 INFO L225 Difference]: With dead ends: 276 [2021-10-13 07:30:06,162 INFO L226 Difference]: Without dead ends: 168 [2021-10-13 07:30:06,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:30:06,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-10-13 07:30:06,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 151. [2021-10-13 07:30:06,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.3333333333333333) internal successors, (200), 150 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 200 transitions. [2021-10-13 07:30:06,178 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 200 transitions. Word has length 49 [2021-10-13 07:30:06,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:06,178 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 200 transitions. [2021-10-13 07:30:06,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:06,179 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 200 transitions. [2021-10-13 07:30:06,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-13 07:30:06,181 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:06,181 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:30:06,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:06,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:06,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:06,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:30:06,793 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:06,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:06,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1982630665, now seen corresponding path program 1 times [2021-10-13 07:30:06,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:30:06,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136617160] [2021-10-13 07:30:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:06,794 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:30:06,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:30:06,795 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:30:06,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 07:30:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:07,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:30:07,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-10-13 07:30:07,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-10-13 07:30:07,667 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:30:07,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136617160] [2021-10-13 07:30:07,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136617160] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:30:07,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1739682104] [2021-10-13 07:30:07,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:07,667 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:30:07,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:30:07,672 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:30:07,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-13 07:30:08,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:08,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:30:08,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-10-13 07:30:08,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:08,949 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-10-13 07:30:08,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1739682104] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:30:08,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599254246] [2021-10-13 07:30:08,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:08,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:30:08,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:30:08,956 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:30:08,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 07:30:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:09,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:30:09,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-10-13 07:30:09,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-13 07:30:09,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599254246] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:30:09,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 07:30:09,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6, 6, 6, 6] total 10 [2021-10-13 07:30:09,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374212287] [2021-10-13 07:30:09,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:30:09,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:30:09,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:30:09,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:30:09,993 INFO L87 Difference]: Start difference. First operand 151 states and 200 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:10,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:10,126 INFO L93 Difference]: Finished difference Result 295 states and 399 transitions. [2021-10-13 07:30:10,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:30:10,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-10-13 07:30:10,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:10,127 INFO L225 Difference]: With dead ends: 295 [2021-10-13 07:30:10,127 INFO L226 Difference]: Without dead ends: 181 [2021-10-13 07:30:10,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:30:10,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-10-13 07:30:10,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 166. [2021-10-13 07:30:10,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.2484848484848485) internal successors, (206), 165 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 206 transitions. [2021-10-13 07:30:10,141 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 206 transitions. Word has length 61 [2021-10-13 07:30:10,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:10,142 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 206 transitions. [2021-10-13 07:30:10,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:10,142 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 206 transitions. [2021-10-13 07:30:10,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-13 07:30:10,144 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:10,145 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:30:10,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:10,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-10-13 07:30:10,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-13 07:30:10,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:30:10,750 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:10,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:10,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1179928735, now seen corresponding path program 2 times [2021-10-13 07:30:10,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:30:10,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639245369] [2021-10-13 07:30:10,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:30:10,751 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:30:10,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:30:10,752 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:30:10,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-13 07:30:11,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:30:11,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:30:11,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:30:11,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-10-13 07:30:11,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-10-13 07:30:12,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:30:12,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639245369] [2021-10-13 07:30:12,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639245369] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:30:12,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [527954942] [2021-10-13 07:30:12,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:30:12,269 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:30:12,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:30:12,270 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:30:12,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-13 07:30:14,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:30:14,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:30:14,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:30:14,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:15,151 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-10-13 07:30:15,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-10-13 07:30:15,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [527954942] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:30:15,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908983611] [2021-10-13 07:30:15,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:30:15,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:30:15,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:30:15,381 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:30:15,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-13 07:30:17,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:30:17,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:30:17,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:30:17,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-10-13 07:30:17,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:18,143 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-10-13 07:30:18,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908983611] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:30:18,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:30:18,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 8] total 16 [2021-10-13 07:30:18,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643950386] [2021-10-13 07:30:18,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 07:30:18,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:30:18,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 07:30:18,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:30:18,145 INFO L87 Difference]: Start difference. First operand 166 states and 206 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:18,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:18,947 INFO L93 Difference]: Finished difference Result 383 states and 500 transitions. [2021-10-13 07:30:18,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 07:30:18,957 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-10-13 07:30:18,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:18,959 INFO L225 Difference]: With dead ends: 383 [2021-10-13 07:30:18,959 INFO L226 Difference]: Without dead ends: 239 [2021-10-13 07:30:18,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 597.2ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-10-13 07:30:18,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-10-13 07:30:18,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 191. [2021-10-13 07:30:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.1105263157894736) internal successors, (211), 190 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2021-10-13 07:30:18,975 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 67 [2021-10-13 07:30:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:18,978 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2021-10-13 07:30:18,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2021-10-13 07:30:18,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-13 07:30:18,981 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:18,981 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:30:19,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:19,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-10-13 07:30:19,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-13 07:30:19,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:30:19,605 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:19,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:19,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1416102914, now seen corresponding path program 3 times [2021-10-13 07:30:19,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:30:19,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20229454] [2021-10-13 07:30:19,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:30:19,606 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:30:19,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:30:19,607 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:30:19,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-13 07:30:20,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 07:30:20,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:30:20,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:30:20,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-13 07:30:21,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-13 07:30:21,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:30:21,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20229454] [2021-10-13 07:30:21,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20229454] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:30:21,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [351100862] [2021-10-13 07:30:21,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:30:21,291 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:30:21,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:30:21,297 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:30:21,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-10-13 07:30:25,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 07:30:25,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:30:25,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:30:25,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-13 07:30:25,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-13 07:30:25,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [351100862] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:30:25,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46040836] [2021-10-13 07:30:25,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:30:25,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:30:25,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:30:25,841 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:30:25,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-13 07:30:28,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 07:30:28,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:30:28,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:30:28,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-13 07:30:28,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-13 07:30:28,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46040836] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:30:28,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:30:28,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-10-13 07:30:28,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962841985] [2021-10-13 07:30:28,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:30:28,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:30:28,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:30:28,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:30:28,749 INFO L87 Difference]: Start difference. First operand 191 states and 211 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:28,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:28,823 INFO L93 Difference]: Finished difference Result 264 states and 293 transitions. [2021-10-13 07:30:28,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:30:28,824 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 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 76 [2021-10-13 07:30:28,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:28,826 INFO L225 Difference]: With dead ends: 264 [2021-10-13 07:30:28,826 INFO L226 Difference]: Without dead ends: 199 [2021-10-13 07:30:28,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:30:28,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-10-13 07:30:28,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-10-13 07:30:28,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.106060606060606) internal successors, (219), 198 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 219 transitions. [2021-10-13 07:30:28,852 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 219 transitions. Word has length 76 [2021-10-13 07:30:28,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:28,853 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 219 transitions. [2021-10-13 07:30:28,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:28,853 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 219 transitions. [2021-10-13 07:30:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-13 07:30:28,854 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:28,855 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:30:28,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-13 07:30:29,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:29,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:29,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:30:29,481 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:29,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:29,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1345801862, now seen corresponding path program 4 times [2021-10-13 07:30:29,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:30:29,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919368053] [2021-10-13 07:30:29,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 07:30:29,482 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:30:29,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:30:29,484 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:30:29,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-13 07:30:31,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 07:30:31,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-13 07:30:31,099 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:30:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:30:32,569 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:30:32,570 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:30:32,571 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:30:32,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:32,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:30:32,803 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:30:32,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:30:32 BoogieIcfgContainer [2021-10-13 07:30:32,900 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:30:32,901 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:30:32,901 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:30:32,901 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:30:32,902 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:29:44" (3/4) ... [2021-10-13 07:30:32,903 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:30:32,989 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:30:32,989 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:30:32,991 INFO L168 Benchmark]: Toolchain (without parser) took 49922.89 ms. Allocated memory was 83.9 MB in the beginning and 104.9 MB in the end (delta: 21.0 MB). Free memory was 48.8 MB in the beginning and 44.3 MB in the end (delta: 4.5 MB). Peak memory consumption was 27.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:32,991 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 83.9 MB. Free memory was 65.6 MB in the beginning and 65.5 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:30:32,991 INFO L168 Benchmark]: CACSL2BoogieTranslator took 374.28 ms. Allocated memory is still 83.9 MB. Free memory was 48.6 MB in the beginning and 66.5 MB in the end (delta: -17.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:32,992 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.86 ms. Allocated memory is still 83.9 MB. Free memory was 66.5 MB in the beginning and 64.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:32,992 INFO L168 Benchmark]: Boogie Preprocessor took 65.20 ms. Allocated memory is still 83.9 MB. Free memory was 64.7 MB in the beginning and 63.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:30:32,992 INFO L168 Benchmark]: RCFGBuilder took 1159.33 ms. Allocated memory is still 83.9 MB. Free memory was 63.0 MB in the beginning and 50.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:32,993 INFO L168 Benchmark]: TraceAbstraction took 48161.63 ms. Allocated memory was 83.9 MB in the beginning and 104.9 MB in the end (delta: 21.0 MB). Free memory was 49.7 MB in the beginning and 51.9 MB in the end (delta: -2.2 MB). Peak memory consumption was 53.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:32,993 INFO L168 Benchmark]: Witness Printer took 88.67 ms. Allocated memory is still 104.9 MB. Free memory was 51.9 MB in the beginning and 44.3 MB in the end (delta: 7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:32,995 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 83.9 MB. Free memory was 65.6 MB in the beginning and 65.5 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 374.28 ms. Allocated memory is still 83.9 MB. Free memory was 48.6 MB in the beginning and 66.5 MB in the end (delta: -17.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 66.86 ms. Allocated memory is still 83.9 MB. Free memory was 66.5 MB in the beginning and 64.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 65.20 ms. Allocated memory is still 83.9 MB. Free memory was 64.7 MB in the beginning and 63.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1159.33 ms. Allocated memory is still 83.9 MB. Free memory was 63.0 MB in the beginning and 50.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 48161.63 ms. Allocated memory was 83.9 MB in the beginning and 104.9 MB in the end (delta: 21.0 MB). Free memory was 49.7 MB in the beginning and 51.9 MB in the end (delta: -2.2 MB). Peak memory consumption was 53.1 MB. Max. memory is 16.1 GB. * Witness Printer took 88.67 ms. Allocated memory is still 104.9 MB. Free memory was 51.9 MB in the beginning and 44.3 MB in the end (delta: 7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[5]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 5) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<5 -1) [L57] x[5 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L61] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 47997.6ms, OverallIterations: 12, TraceHistogramMax: 5, EmptinessCheckTime: 34.5ms, AutomataDifference: 4005.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 350 SDtfs, 604 SDslu, 939 SDs, 0 SdLazy, 667 SolverSat, 265 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2728.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2401 GetRequests, 2309 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1735.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=199occurred in iteration=11, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 175.4ms AutomataMinimizationTime, 11 MinimizatonAttempts, 171 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 368.2ms SsaConstructionTime, 17771.4ms SatisfiabilityAnalysisTime, 10348.4ms InterpolantComputationTime, 1302 NumberOfCodeBlocks, 1203 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 2388 ConstructedInterpolants, 0 QuantifiedInterpolants, 3481 SizeOfPredicates, 28 NumberOfNonLiveVariables, 2821 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 56 InterpolantComputations, 13 PerfectInterpolantSequences, 2216/2512 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 07:30:33,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d328ae3-fc81-45be-81fc-0bf39b542ebd/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...