./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.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_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/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_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/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_5da12cd4-f969-430b-9352-47f2f2003450/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 e0b85db7f19d029ed27be7f6b92a191abc3110f8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/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_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/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_5da12cd4-f969-430b-9352-47f2f2003450/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 e0b85db7f19d029ed27be7f6b92a191abc3110f8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:25:26,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:25:26,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:25:26,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:25:26,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:25:26,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:25:26,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:25:26,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:25:26,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:25:26,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:25:26,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:25:26,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:25:26,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:25:26,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:25:26,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:25:26,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:25:26,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:25:26,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:25:26,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:25:26,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:25:26,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:25:26,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:25:26,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:25:26,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:25:26,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:25:26,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:25:26,575 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:25:26,576 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:25:26,577 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:25:26,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:25:26,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:25:26,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:25:26,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:25:26,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:25:26,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:25:26,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:25:26,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:25:26,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:25:26,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:25:26,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:25:26,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:25:26,591 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:25:26,622 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:25:26,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:25:26,623 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:25:26,624 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:25:26,624 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:25:26,624 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:25:26,625 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:25:26,625 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:25:26,625 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:25:26,626 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:25:26,626 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:25:26,626 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:25:26,626 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:25:26,627 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:25:26,627 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:25:26,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:25:26,628 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:25:26,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:25:26,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:25:26,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:25:26,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:25:26,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:25:26,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:25:26,630 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:25:26,630 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:25:26,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:25:26,631 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:25:26,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:25:26,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:25:26,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:25:26,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:25:26,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:25:26,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:25:26,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:25:26,633 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:25:26,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:25:26,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:25:26,634 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:25:26,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:25:26,635 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_5da12cd4-f969-430b-9352-47f2f2003450/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0b85db7f19d029ed27be7f6b92a191abc3110f8 [2021-10-13 07:25:26,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:25:26,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:25:26,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:25:26,991 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:25:26,992 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:25:26,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i [2021-10-13 07:25:27,103 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/data/5f0b63809/cbd14c5c03404a7985e1afe72cbf9ebe/FLAGdda1021ce [2021-10-13 07:25:27,780 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:25:27,781 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i [2021-10-13 07:25:27,801 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/data/5f0b63809/cbd14c5c03404a7985e1afe72cbf9ebe/FLAGdda1021ce [2021-10-13 07:25:28,073 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/data/5f0b63809/cbd14c5c03404a7985e1afe72cbf9ebe [2021-10-13 07:25:28,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:25:28,078 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:25:28,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:25:28,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:25:28,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:25:28,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:25:28" (1/1) ... [2021-10-13 07:25:28,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@409a8eed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:28, skipping insertion in model container [2021-10-13 07:25:28,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:25:28" (1/1) ... [2021-10-13 07:25:28,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:25:28,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:25:28,662 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_5da12cd4-f969-430b-9352-47f2f2003450/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i[24291,24304] [2021-10-13 07:25:28,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:25:28,688 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:25:28,766 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_5da12cd4-f969-430b-9352-47f2f2003450/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i[24291,24304] [2021-10-13 07:25:28,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:25:28,820 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:25:28,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:28 WrapperNode [2021-10-13 07:25:28,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:25:28,822 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:25:28,823 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:25:28,823 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:25:28,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:28" (1/1) ... [2021-10-13 07:25:28,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:28" (1/1) ... [2021-10-13 07:25:28,893 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:25:28,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:25:28,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:25:28,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:25:28,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:28" (1/1) ... [2021-10-13 07:25:28,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:28" (1/1) ... [2021-10-13 07:25:28,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:28" (1/1) ... [2021-10-13 07:25:28,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:28" (1/1) ... [2021-10-13 07:25:28,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:28" (1/1) ... [2021-10-13 07:25:28,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:28" (1/1) ... [2021-10-13 07:25:28,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:28" (1/1) ... [2021-10-13 07:25:28,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:25:28,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:25:28,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:25:28,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:25:28,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:28" (1/1) ... [2021-10-13 07:25:28,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:25:29,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:25:29,032 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:25:29,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:25:29,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:25:29,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:25:29,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:25:29,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:25:29,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:25:29,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:25:29,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:25:29,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:25:29,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:25:29,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:25:30,577 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:25:30,577 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-13 07:25:30,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:25:30 BoogieIcfgContainer [2021-10-13 07:25:30,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:25:30,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:25:30,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:25:30,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:25:30,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:25:28" (1/3) ... [2021-10-13 07:25:30,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41740a1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:25:30, skipping insertion in model container [2021-10-13 07:25:30,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:28" (2/3) ... [2021-10-13 07:25:30,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41740a1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:25:30, skipping insertion in model container [2021-10-13 07:25:30,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:25:30" (3/3) ... [2021-10-13 07:25:30,595 INFO L111 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2021-10-13 07:25:30,600 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:25:30,600 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:25:30,664 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:25:30,682 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 07:25:30,682 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:25:30,701 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:30,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:25:30,709 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:30,710 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:30,712 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:30,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:30,729 INFO L82 PathProgramCache]: Analyzing trace with hash 806321172, now seen corresponding path program 1 times [2021-10-13 07:25:30,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:25:30,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146646309] [2021-10-13 07:25:30,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:30,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:25:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:30,956 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 07:25:30,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:25:30,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146646309] [2021-10-13 07:25:30,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146646309] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:30,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:30,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:25:30,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960192025] [2021-10-13 07:25:30,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:25:30,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:25:30,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:25:30,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:25:30,999 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:31,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:31,050 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2021-10-13 07:25:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:25:31,053 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 07:25:31,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:31,063 INFO L225 Difference]: With dead ends: 63 [2021-10-13 07:25:31,063 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 07:25:31,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:25:31,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 07:25:31,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-13 07:25:31,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 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 07:25:31,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-10-13 07:25:31,114 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 13 [2021-10-13 07:25:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:31,115 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-10-13 07:25:31,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:31,116 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-10-13 07:25:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:25:31,117 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:31,117 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:31,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:25:31,118 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:31,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:31,124 INFO L82 PathProgramCache]: Analyzing trace with hash -2142167200, now seen corresponding path program 1 times [2021-10-13 07:25:31,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:25:31,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103260695] [2021-10-13 07:25:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:31,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:25:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:31,230 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 07:25:31,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:25:31,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103260695] [2021-10-13 07:25:31,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103260695] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:31,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:31,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:25:31,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088695204] [2021-10-13 07:25:31,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:25:31,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:25:31,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:25:31,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:25:31,235 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 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 07:25:31,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:31,268 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-10-13 07:25:31,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:25:31,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-10-13 07:25:31,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:31,271 INFO L225 Difference]: With dead ends: 47 [2021-10-13 07:25:31,272 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 07:25:31,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:25:31,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 07:25:31,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-10-13 07:25:31,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 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 07:25:31,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-10-13 07:25:31,283 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2021-10-13 07:25:31,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:31,284 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-10-13 07:25:31,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 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 07:25:31,284 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-10-13 07:25:31,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 07:25:31,288 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:31,291 INFO L512 BasicCegarLoop]: trace histogram [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 07:25:31,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:25:31,292 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:31,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:31,293 INFO L82 PathProgramCache]: Analyzing trace with hash -952198860, now seen corresponding path program 1 times [2021-10-13 07:25:31,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:25:31,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679042962] [2021-10-13 07:25:31,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:31,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:25:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:31,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:25:31,529 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:25:31,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679042962] [2021-10-13 07:25:31,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679042962] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:31,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:31,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:25:31,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851348316] [2021-10-13 07:25:31,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:25:31,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:25:31,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:25:31,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:25:31,536 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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 07:25:31,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:31,896 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-10-13 07:25:31,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:25:31,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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 22 [2021-10-13 07:25:31,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:31,902 INFO L225 Difference]: With dead ends: 51 [2021-10-13 07:25:31,902 INFO L226 Difference]: Without dead ends: 47 [2021-10-13 07:25:31,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:25:31,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-13 07:25:31,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-10-13 07:25:31,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 states have internal predecessors, (47), 0 states have call successors, (0), 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 07:25:31,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-10-13 07:25:31,920 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 22 [2021-10-13 07:25:31,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:31,921 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-10-13 07:25:31,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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 07:25:31,921 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-10-13 07:25:31,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 07:25:31,924 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:31,924 INFO L512 BasicCegarLoop]: trace histogram [2, 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 07:25:31,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:25:31,925 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:31,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:31,927 INFO L82 PathProgramCache]: Analyzing trace with hash -186390417, now seen corresponding path program 1 times [2021-10-13 07:25:31,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:25:31,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239461281] [2021-10-13 07:25:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:31,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:25:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:25:32,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:25:32,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239461281] [2021-10-13 07:25:32,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239461281] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:32,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:32,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:25:32,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537585692] [2021-10-13 07:25:32,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:25:32,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:25:32,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:25:32,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:25:32,094 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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 07:25:32,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:32,364 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2021-10-13 07:25:32,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:25:32,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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 07:25:32,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:32,366 INFO L225 Difference]: With dead ends: 53 [2021-10-13 07:25:32,366 INFO L226 Difference]: Without dead ends: 45 [2021-10-13 07:25:32,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:25:32,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-13 07:25:32,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2021-10-13 07:25:32,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 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 07:25:32,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-10-13 07:25:32,373 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 24 [2021-10-13 07:25:32,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:32,373 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-10-13 07:25:32,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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 07:25:32,374 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-10-13 07:25:32,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 07:25:32,375 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:32,375 INFO L512 BasicCegarLoop]: trace histogram [2, 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 07:25:32,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 07:25:32,376 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:32,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:32,376 INFO L82 PathProgramCache]: Analyzing trace with hash 838312559, now seen corresponding path program 1 times [2021-10-13 07:25:32,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:25:32,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846883799] [2021-10-13 07:25:32,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:32,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:25:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:32,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:25:32,504 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:25:32,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846883799] [2021-10-13 07:25:32,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846883799] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:32,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:32,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:25:32,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887640716] [2021-10-13 07:25:32,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:25:32,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:25:32,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:25:32,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:25:32,508 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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 07:25:32,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:32,731 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2021-10-13 07:25:32,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:25:32,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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 07:25:32,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:32,732 INFO L225 Difference]: With dead ends: 53 [2021-10-13 07:25:32,732 INFO L226 Difference]: Without dead ends: 42 [2021-10-13 07:25:32,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:25:32,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-13 07:25:32,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2021-10-13 07:25:32,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-10-13 07:25:32,738 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 24 [2021-10-13 07:25:32,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:32,739 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-10-13 07:25:32,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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 07:25:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-10-13 07:25:32,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 07:25:32,740 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:32,741 INFO L512 BasicCegarLoop]: trace histogram [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 07:25:32,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 07:25:32,741 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:32,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:32,742 INFO L82 PathProgramCache]: Analyzing trace with hash -2073124692, now seen corresponding path program 1 times [2021-10-13 07:25:32,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:25:32,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343736505] [2021-10-13 07:25:32,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:32,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:25:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:25:32,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:25:32,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343736505] [2021-10-13 07:25:32,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343736505] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:25:32,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079451447] [2021-10-13 07:25:32,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:32,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:25:32,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:25:32,890 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:25:32,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:25:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:33,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 07:25:33,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:33,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:25:33,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:25:33,421 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:25:33,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 07:25:33,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:25:33,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:25:33,623 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:25:33,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 07:25:33,755 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:25:33,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-13 07:25:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:25:33,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:34,549 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.offset Int)) (= 2 (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset 3)) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) is different from false [2021-10-13 07:25:34,589 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:25:34,591 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:25:42,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 212 [2021-10-13 07:25:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2021-10-13 07:25:43,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079451447] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:25:43,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2022464443] [2021-10-13 07:25:43,452 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-10-13 07:25:43,452 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:25:43,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:25:43,466 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:25:43,466 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:25:43,550 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:25:43,551 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:25:43,552 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:25:43,553 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:25:43,554 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:25:43,555 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:25:43,555 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:25:43,556 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:25:43,557 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:25:43,557 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-10-13 07:25:43,558 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:25:43,558 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:25:43,559 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:25:43,560 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:25:43,578 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 07:25:43,579 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 07:25:43,580 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:25:43,580 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:25:43,581 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-10-13 07:25:43,582 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:25:43,583 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:25:43,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:25:43,584 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:25:43,584 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:25:43,585 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:25:43,585 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:25:43,586 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:25:43,586 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:25:43,590 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-10-13 07:25:43,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:25:43,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-10-13 07:25:43,635 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:25:43,636 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-13 07:25:43,636 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:25:43,637 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-13 07:25:43,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:25:43,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:25:43,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:25:43,658 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:25:43,667 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 182 [2021-10-13 07:25:43,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:25:43,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:182, output treesize:182 [2021-10-13 07:25:43,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:43,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:25:43,885 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_46| 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 07:25:43,890 INFO L168 Benchmark]: Toolchain (without parser) took 15811.45 ms. Allocated memory was 132.1 MB in the beginning and 159.4 MB in the end (delta: 27.3 MB). Free memory was 94.1 MB in the beginning and 123.3 MB in the end (delta: -29.1 MB). Peak memory consumption was 75.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:25:43,891 INFO L168 Benchmark]: CDTParser took 1.13 ms. Allocated memory is still 132.1 MB. Free memory was 102.7 MB in the beginning and 102.7 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:25:43,892 INFO L168 Benchmark]: CACSL2BoogieTranslator took 741.12 ms. Allocated memory is still 132.1 MB. Free memory was 93.9 MB in the beginning and 99.9 MB in the end (delta: -6.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:25:43,893 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.01 ms. Allocated memory is still 132.1 MB. Free memory was 99.3 MB in the beginning and 97.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:25:43,894 INFO L168 Benchmark]: Boogie Preprocessor took 79.69 ms. Allocated memory is still 132.1 MB. Free memory was 97.2 MB in the beginning and 95.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:25:43,894 INFO L168 Benchmark]: RCFGBuilder took 1601.83 ms. Allocated memory is still 132.1 MB. Free memory was 95.1 MB in the beginning and 58.5 MB in the end (delta: 36.6 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:25:43,895 INFO L168 Benchmark]: TraceAbstraction took 13306.20 ms. Allocated memory was 132.1 MB in the beginning and 159.4 MB in the end (delta: 27.3 MB). Free memory was 58.0 MB in the beginning and 123.3 MB in the end (delta: -65.3 MB). Peak memory consumption was 40.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:25:43,900 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.13 ms. Allocated memory is still 132.1 MB. Free memory was 102.7 MB in the beginning and 102.7 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 741.12 ms. Allocated memory is still 132.1 MB. Free memory was 93.9 MB in the beginning and 99.9 MB in the end (delta: -6.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 75.01 ms. Allocated memory is still 132.1 MB. Free memory was 99.3 MB in the beginning and 97.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 79.69 ms. Allocated memory is still 132.1 MB. Free memory was 97.2 MB in the beginning and 95.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1601.83 ms. Allocated memory is still 132.1 MB. Free memory was 95.1 MB in the beginning and 58.5 MB in the end (delta: 36.6 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13306.20 ms. Allocated memory was 132.1 MB in the beginning and 159.4 MB in the end (delta: 27.3 MB). Free memory was 58.0 MB in the beginning and 123.3 MB in the end (delta: -65.3 MB). Peak memory consumption was 40.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_46| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_46|: 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 07:25:43,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/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 07:25:46,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:25:46,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:25:46,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:25:46,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:25:46,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:25:46,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:25:46,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:25:46,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:25:46,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:25:46,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:25:46,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:25:46,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:25:46,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:25:46,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:25:46,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:25:46,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:25:46,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:25:46,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:25:46,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:25:46,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:25:46,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:25:46,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:25:46,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:25:46,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:25:46,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:25:46,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:25:46,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:25:46,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:25:46,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:25:46,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:25:46,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:25:46,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:25:46,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:25:46,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:25:46,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:25:46,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:25:46,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:25:46,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:25:46,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:25:46,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:25:46,670 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:25:46,711 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:25:46,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:25:46,712 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:25:46,712 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:25:46,713 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:25:46,713 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:25:46,713 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:25:46,713 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:25:46,713 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:25:46,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:25:46,716 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:25:46,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:25:46,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:25:46,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:25:46,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:25:46,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:25:46,717 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:25:46,717 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:25:46,717 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:25:46,717 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:25:46,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:25:46,718 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:25:46,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:25:46,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:25:46,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:25:46,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:25:46,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:25:46,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:25:46,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:25:46,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:25:46,720 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:25:46,720 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:25:46,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:25:46,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:25:46,721 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:25:46,721 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_5da12cd4-f969-430b-9352-47f2f2003450/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0b85db7f19d029ed27be7f6b92a191abc3110f8 [2021-10-13 07:25:47,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:25:47,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:25:47,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:25:47,150 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:25:47,150 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:25:47,151 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i [2021-10-13 07:25:47,219 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/data/c4b9a3fdd/d1a5415515704992bdde3fd71ecb8e82/FLAG3c1d9e70a [2021-10-13 07:25:47,920 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:25:47,921 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i [2021-10-13 07:25:47,937 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/data/c4b9a3fdd/d1a5415515704992bdde3fd71ecb8e82/FLAG3c1d9e70a [2021-10-13 07:25:48,130 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/data/c4b9a3fdd/d1a5415515704992bdde3fd71ecb8e82 [2021-10-13 07:25:48,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:25:48,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:25:48,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:25:48,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:25:48,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:25:48,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:25:48" (1/1) ... [2021-10-13 07:25:48,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@733f9bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:48, skipping insertion in model container [2021-10-13 07:25:48,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:25:48" (1/1) ... [2021-10-13 07:25:48,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:25:48,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:25:48,772 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_5da12cd4-f969-430b-9352-47f2f2003450/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i[24291,24304] [2021-10-13 07:25:48,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:25:48,809 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:25:48,894 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_5da12cd4-f969-430b-9352-47f2f2003450/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i[24291,24304] [2021-10-13 07:25:48,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:25:48,958 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:25:48,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:48 WrapperNode [2021-10-13 07:25:48,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:25:48,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:25:48,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:25:48,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:25:48,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:48" (1/1) ... [2021-10-13 07:25:49,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:48" (1/1) ... [2021-10-13 07:25:49,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:25:49,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:25:49,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:25:49,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:25:49,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:48" (1/1) ... [2021-10-13 07:25:49,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:48" (1/1) ... [2021-10-13 07:25:49,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:48" (1/1) ... [2021-10-13 07:25:49,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:48" (1/1) ... [2021-10-13 07:25:49,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:48" (1/1) ... [2021-10-13 07:25:49,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:48" (1/1) ... [2021-10-13 07:25:49,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:48" (1/1) ... [2021-10-13 07:25:49,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:25:49,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:25:49,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:25:49,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:25:49,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:48" (1/1) ... [2021-10-13 07:25:49,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:25:49,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:25:49,205 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:25:49,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:25:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:25:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:25:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:25:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:25:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:25:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:25:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:25:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:25:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:25:49,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:25:50,134 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:25:50,134 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-13 07:25:50,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:25:50 BoogieIcfgContainer [2021-10-13 07:25:50,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:25:50,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:25:50,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:25:50,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:25:50,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:25:48" (1/3) ... [2021-10-13 07:25:50,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d5b6dd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:25:50, skipping insertion in model container [2021-10-13 07:25:50,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:25:48" (2/3) ... [2021-10-13 07:25:50,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d5b6dd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:25:50, skipping insertion in model container [2021-10-13 07:25:50,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:25:50" (3/3) ... [2021-10-13 07:25:50,148 INFO L111 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2021-10-13 07:25:50,158 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:25:50,158 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:25:50,229 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:25:50,237 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 07:25:50,237 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:25:50,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 43 states have (on average 1.6744186046511629) internal successors, (72), 44 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:50,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:25:50,262 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:50,262 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:50,263 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:50,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:50,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1882534868, now seen corresponding path program 1 times [2021-10-13 07:25:50,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:50,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201972512] [2021-10-13 07:25:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:50,290 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:50,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:50,302 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:50,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:25:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:50,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:25:50,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:50,579 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 07:25:50,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:50,702 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 07:25:50,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:50,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201972512] [2021-10-13 07:25:50,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201972512] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:50,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:50,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:25:50,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725611635] [2021-10-13 07:25:50,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:25:50,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:50,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:25:50,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:25:50,737 INFO L87 Difference]: Start difference. First operand has 45 states, 43 states have (on average 1.6744186046511629) internal successors, (72), 44 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 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 07:25:50,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:50,769 INFO L93 Difference]: Finished difference Result 88 states and 142 transitions. [2021-10-13 07:25:50,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:25:50,771 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 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) Word has length 16 [2021-10-13 07:25:50,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:50,778 INFO L225 Difference]: With dead ends: 88 [2021-10-13 07:25:50,778 INFO L226 Difference]: Without dead ends: 38 [2021-10-13 07:25:50,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 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 07:25:50,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-13 07:25:50,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-13 07:25:50,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 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 07:25:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 53 transitions. [2021-10-13 07:25:50,814 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 53 transitions. Word has length 16 [2021-10-13 07:25:50,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:50,815 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 53 transitions. [2021-10-13 07:25:50,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 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 07:25:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 53 transitions. [2021-10-13 07:25:50,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:25:50,817 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:50,817 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:50,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:51,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:51,023 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:51,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:51,024 INFO L82 PathProgramCache]: Analyzing trace with hash -509442169, now seen corresponding path program 1 times [2021-10-13 07:25:51,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:51,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795543104] [2021-10-13 07:25:51,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:51,027 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:51,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:51,029 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:51,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:25:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:51,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:25:51,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:51,265 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 07:25:51,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:51,350 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 07:25:51,350 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:51,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795543104] [2021-10-13 07:25:51,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795543104] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:51,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:51,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:25:51,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659053621] [2021-10-13 07:25:51,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:25:51,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:51,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:25:51,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:25:51,358 INFO L87 Difference]: Start difference. First operand 38 states and 53 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 07:25:51,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:51,394 INFO L93 Difference]: Finished difference Result 64 states and 88 transitions. [2021-10-13 07:25:51,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:25:51,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-10-13 07:25:51,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:51,398 INFO L225 Difference]: With dead ends: 64 [2021-10-13 07:25:51,399 INFO L226 Difference]: Without dead ends: 46 [2021-10-13 07:25:51,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:25:51,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-13 07:25:51,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-10-13 07:25:51,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 45 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 07:25:51,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 66 transitions. [2021-10-13 07:25:51,425 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 66 transitions. Word has length 18 [2021-10-13 07:25:51,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:51,426 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 66 transitions. [2021-10-13 07:25:51,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 07:25:51,427 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 66 transitions. [2021-10-13 07:25:51,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 07:25:51,435 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:51,435 INFO L512 BasicCegarLoop]: trace histogram [1, 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 07:25:51,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:51,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:51,646 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:51,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:51,647 INFO L82 PathProgramCache]: Analyzing trace with hash 610466292, now seen corresponding path program 1 times [2021-10-13 07:25:51,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:51,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713577652] [2021-10-13 07:25:51,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:51,649 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:51,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:51,651 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:51,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:25:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:51,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:25:51,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:51,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:51,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:51,960 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:51,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713577652] [2021-10-13 07:25:51,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713577652] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:51,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:51,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:25:51,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005092102] [2021-10-13 07:25:51,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:25:51,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:51,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:25:51,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:25:51,966 INFO L87 Difference]: Start difference. First operand 46 states and 66 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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 07:25:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:52,000 INFO L93 Difference]: Finished difference Result 82 states and 118 transitions. [2021-10-13 07:25:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:25:52,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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 07:25:52,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:52,002 INFO L225 Difference]: With dead ends: 82 [2021-10-13 07:25:52,002 INFO L226 Difference]: Without dead ends: 48 [2021-10-13 07:25:52,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:25:52,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-13 07:25:52,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-13 07:25:52,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.446808510638298) internal successors, (68), 47 states have internal predecessors, (68), 0 states have call successors, (0), 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 07:25:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2021-10-13 07:25:52,011 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 24 [2021-10-13 07:25:52,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:52,011 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2021-10-13 07:25:52,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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 07:25:52,012 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2021-10-13 07:25:52,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 07:25:52,013 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:52,014 INFO L512 BasicCegarLoop]: trace histogram [1, 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 07:25:52,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:52,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:52,230 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:52,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:52,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1383678414, now seen corresponding path program 1 times [2021-10-13 07:25:52,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:52,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99532112] [2021-10-13 07:25:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:52,233 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:52,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:52,239 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:52,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:25:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:52,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:25:52,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:52,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:25:52,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 07:25:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:25:52,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:52,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-13 07:25:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:25:52,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:52,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99532112] [2021-10-13 07:25:52,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99532112] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:52,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:52,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-13 07:25:52,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444950387] [2021-10-13 07:25:52,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:25:52,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:52,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:25:52,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:25:52,794 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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 07:25:53,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:53,160 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2021-10-13 07:25:53,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:25:53,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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 07:25:53,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:53,162 INFO L225 Difference]: With dead ends: 71 [2021-10-13 07:25:53,162 INFO L226 Difference]: Without dead ends: 67 [2021-10-13 07:25:53,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:25:53,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-13 07:25:53,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2021-10-13 07:25:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 54 states have internal predecessors, (78), 0 states have call successors, (0), 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 07:25:53,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 78 transitions. [2021-10-13 07:25:53,171 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 78 transitions. Word has length 24 [2021-10-13 07:25:53,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:53,172 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 78 transitions. [2021-10-13 07:25:53,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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 07:25:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 78 transitions. [2021-10-13 07:25:53,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 07:25:53,173 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:53,174 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 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 07:25:53,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:53,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:53,390 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:53,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:53,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1773585421, now seen corresponding path program 1 times [2021-10-13 07:25:53,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:53,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875436442] [2021-10-13 07:25:53,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:53,391 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:53,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:53,392 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:53,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:25:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:53,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:25:53,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:53,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:25:53,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 07:25:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:25:53,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:53,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 07:25:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:25:53,741 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:53,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875436442] [2021-10-13 07:25:53,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875436442] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:53,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:53,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-13 07:25:53,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981836774] [2021-10-13 07:25:53,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:25:53,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:53,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:25:53,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:25:53,750 INFO L87 Difference]: Start difference. First operand 55 states and 78 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 07:25:54,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:54,224 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2021-10-13 07:25:54,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:25:54,224 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 26 [2021-10-13 07:25:54,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:54,225 INFO L225 Difference]: With dead ends: 73 [2021-10-13 07:25:54,226 INFO L226 Difference]: Without dead ends: 65 [2021-10-13 07:25:54,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:25:54,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-13 07:25:54,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2021-10-13 07:25:54,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 52 states have internal predecessors, (75), 0 states have call successors, (0), 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 07:25:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 75 transitions. [2021-10-13 07:25:54,233 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 75 transitions. Word has length 26 [2021-10-13 07:25:54,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:54,233 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 75 transitions. [2021-10-13 07:25:54,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 07:25:54,233 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 75 transitions. [2021-10-13 07:25:54,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 07:25:54,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:54,235 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 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 07:25:54,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:54,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:54,448 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:54,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:54,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1496678899, now seen corresponding path program 1 times [2021-10-13 07:25:54,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:54,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653868884] [2021-10-13 07:25:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:54,450 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:54,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:54,451 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:54,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:25:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:54,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:25:54,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:54,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:25:54,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 07:25:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:25:54,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:54,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 07:25:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:25:54,837 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:54,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653868884] [2021-10-13 07:25:54,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653868884] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:54,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:54,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-13 07:25:54,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330989164] [2021-10-13 07:25:54,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:25:54,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:54,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:25:54,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:25:54,839 INFO L87 Difference]: Start difference. First operand 53 states and 75 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 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 07:25:55,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:55,253 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2021-10-13 07:25:55,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:25:55,254 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 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 26 [2021-10-13 07:25:55,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:55,255 INFO L225 Difference]: With dead ends: 73 [2021-10-13 07:25:55,255 INFO L226 Difference]: Without dead ends: 62 [2021-10-13 07:25:55,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:25:55,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-13 07:25:55,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2021-10-13 07:25:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 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 07:25:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 71 transitions. [2021-10-13 07:25:55,261 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 71 transitions. Word has length 26 [2021-10-13 07:25:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:55,261 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 71 transitions. [2021-10-13 07:25:55,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 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 07:25:55,262 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 71 transitions. [2021-10-13 07:25:55,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 07:25:55,263 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:55,263 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 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 07:25:55,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:55,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:55,474 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:55,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:55,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1846820767, now seen corresponding path program 1 times [2021-10-13 07:25:55,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:55,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687515731] [2021-10-13 07:25:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:55,475 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:55,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:55,476 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:55,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:25:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:55,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:25:55,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:55,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:25:55,793 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:25:55,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-10-13 07:25:55,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:25:55,885 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 07:25:55,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:25:55,963 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:25:55,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 07:25:56,053 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:25:56,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-13 07:25:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:25:56,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:57,935 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32))) (= (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv3 32))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv2 32))) is different from false [2021-10-13 07:25:57,970 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:25:57,972 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:25:59,988 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_40 (_ BitVec 32))) (= (_ bv2 32) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_1)))) (store .cse0 c_ULTIMATE.start_main_~t~0.base (store (select .cse0 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_40 (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) is different from false [2021-10-13 07:26:00,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 115 [2021-10-13 07:26:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2021-10-13 07:26:00,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:00,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687515731] [2021-10-13 07:26:00,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687515731] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:00,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [746946184] [2021-10-13 07:26:00,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:00,371 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:00,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:26:00,373 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:26:00,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-13 07:26:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:00,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 07:26:00,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:00,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:26:00,963 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:26:00,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-10-13 07:26:00,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:26:01,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:01,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:26:01,198 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:26:01,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 07:26:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:26:01,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:01,481 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:01,483 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:26:04,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 449 treesize of output 433 [2021-10-13 07:26:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2021-10-13 07:26:04,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [746946184] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:04,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157570184] [2021-10-13 07:26:04,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:04,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:04,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:04,663 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:26:04,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 07:26:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:04,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 07:26:04,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:05,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:26:05,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:26:05,142 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:26:05,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-10-13 07:26:05,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:05,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:26:05,275 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:26:05,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 07:26:05,359 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:26:05,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-13 07:26:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:26:05,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:05,435 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:05,436 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:26:07,451 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_3 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_52 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_3)))) (store .cse0 c_ULTIMATE.start_main_~t~0.base (store (select .cse0 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_52 (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv2 32))) is different from false [2021-10-13 07:26:07,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 213 [2021-10-13 07:26:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2021-10-13 07:26:07,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157570184] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:07,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:26:07,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-10-13 07:26:07,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434187447] [2021-10-13 07:26:07,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 07:26:07,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:07,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 07:26:07,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=222, Unknown=4, NotChecked=96, Total=380 [2021-10-13 07:26:07,890 INFO L87 Difference]: Start difference. First operand 50 states and 71 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 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 07:26:15,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:15,552 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2021-10-13 07:26:15,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:26:15,553 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 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 27 [2021-10-13 07:26:15,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:15,554 INFO L225 Difference]: With dead ends: 86 [2021-10-13 07:26:15,554 INFO L226 Difference]: Without dead ends: 80 [2021-10-13 07:26:15,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 126 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 11139.1ms TimeCoverageRelationStatistics Valid=80, Invalid=308, Unknown=4, NotChecked=114, Total=506 [2021-10-13 07:26:15,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-13 07:26:15,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2021-10-13 07:26:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 0 states have call successors, (0), 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 07:26:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2021-10-13 07:26:15,563 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 27 [2021-10-13 07:26:15,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:15,563 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2021-10-13 07:26:15,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 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 07:26:15,564 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2021-10-13 07:26:15,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 07:26:15,565 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:15,565 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 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 07:26:15,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:15,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:16,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-13 07:26:16,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:16,183 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:16,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:16,184 INFO L82 PathProgramCache]: Analyzing trace with hash 2070591548, now seen corresponding path program 1 times [2021-10-13 07:26:16,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:16,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757914053] [2021-10-13 07:26:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:16,186 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:16,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:16,187 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:16,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 07:26:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:16,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:26:16,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:16,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:26:16,617 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:26:16,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-13 07:26:16,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:26:16,738 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 07:26:16,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:26:16,829 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:26:16,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 07:26:16,973 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:26:16,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-13 07:26:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:26:17,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:24,850 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:24,851 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:26:26,866 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.offset_58 (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32))) (= (_ bv1 32) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_4)))) (store .cse0 c_ULTIMATE.start_main_~t~0.base (store (select .cse0 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_58 (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) is different from false [2021-10-13 07:26:26,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 113 [2021-10-13 07:26:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:26:27,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:27,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757914053] [2021-10-13 07:26:27,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757914053] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:27,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1100481172] [2021-10-13 07:26:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:27,194 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:27,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:26:27,198 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:26:27,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-13 07:26:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:27,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:26:27,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:27,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:26:27,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:26:27,821 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:26:27,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-10-13 07:26:27,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:27,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:26:28,065 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:26:28,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 07:26:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:26:28,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:28,437 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:28,438 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:26:36,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 113 [2021-10-13 07:26:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:26:38,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1100481172] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:38,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990262990] [2021-10-13 07:26:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:38,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:38,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:38,903 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:26:38,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 07:26:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:39,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 07:26:39,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:39,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:26:39,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:26:39,386 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:26:39,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-10-13 07:26:39,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:39,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:26:39,542 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:26:39,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 07:26:39,711 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:26:39,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-13 07:26:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:26:39,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:39,809 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:39,810 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:26:48,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 214 [2021-10-13 07:26:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:26:49,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990262990] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:49,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:26:49,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 19 [2021-10-13 07:26:49,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169944715] [2021-10-13 07:26:49,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 07:26:49,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:49,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 07:26:49,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=244, Unknown=8, NotChecked=32, Total=342 [2021-10-13 07:26:49,340 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 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 07:26:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:59,476 INFO L93 Difference]: Finished difference Result 93 states and 121 transitions. [2021-10-13 07:26:59,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:26:59,477 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 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 27 [2021-10-13 07:26:59,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:59,478 INFO L225 Difference]: With dead ends: 93 [2021-10-13 07:26:59,478 INFO L226 Difference]: Without dead ends: 89 [2021-10-13 07:26:59,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 127 SyntacticMatches, 13 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 33835.1ms TimeCoverageRelationStatistics Valid=75, Invalid=300, Unknown=9, NotChecked=36, Total=420 [2021-10-13 07:26:59,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-13 07:26:59,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2021-10-13 07:26:59,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.40625) internal successors, (90), 64 states have internal predecessors, (90), 0 states have call successors, (0), 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 07:26:59,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 90 transitions. [2021-10-13 07:26:59,489 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 90 transitions. Word has length 27 [2021-10-13 07:26:59,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:59,490 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 90 transitions. [2021-10-13 07:26:59,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 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 07:26:59,490 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 90 transitions. [2021-10-13 07:26:59,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 07:26:59,492 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:59,492 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 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 07:26:59,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:59,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:59,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:00,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:27:00,103 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:27:00,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:27:00,104 INFO L82 PathProgramCache]: Analyzing trace with hash 100118652, now seen corresponding path program 1 times [2021-10-13 07:27:00,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:27:00,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817744021] [2021-10-13 07:27:00,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:27:00,105 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:27:00,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:27:00,106 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:27:00,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 07:27:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:27:00,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 07:27:00,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:00,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:27:00,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:27:00,846 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 07:27:00,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 75 [2021-10-13 07:27:00,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2021-10-13 07:27:00,880 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 07:27:00,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 44 [2021-10-13 07:27:01,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-10-13 07:27:01,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-10-13 07:27:01,188 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:27:01,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-10-13 07:27:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:27:01,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:01,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:27:01,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 111 [2021-10-13 07:27:01,497 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:27:01,499 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-10-13 07:27:01,503 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:27:01,505 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-10-13 07:27:01,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 123 [2021-10-13 07:27:01,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 269 treesize of output 257 [2021-10-13 07:27:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:27:02,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:27:02,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817744021] [2021-10-13 07:27:02,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817744021] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:02,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [849832368] [2021-10-13 07:27:02,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:27:02,413 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:27:02,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:27:02,414 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:27:02,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-13 07:27:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:27:02,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 07:27:02,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:03,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:27:03,289 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:27:03,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-13 07:27:03,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-13 07:27:03,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:27:03,618 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 07:27:03,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 79 [2021-10-13 07:27:03,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 66 [2021-10-13 07:27:03,653 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 07:27:03,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 52 [2021-10-13 07:27:03,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-10-13 07:27:03,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-10-13 07:27:03,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 07:27:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:27:03,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:04,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2021-10-13 07:27:04,066 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:27:04,068 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 07:27:04,071 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:27:04,072 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:27:04,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 77 [2021-10-13 07:27:04,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:27:04,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:27:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:27:07,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [849832368] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:07,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066124955] [2021-10-13 07:27:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:27:07,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:27:07,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:27:07,707 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:27:07,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 07:27:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:27:08,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 07:27:08,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:08,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:27:08,199 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:27:08,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-13 07:27:08,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:27:08,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-13 07:27:08,467 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 07:27:08,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 72 [2021-10-13 07:27:08,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2021-10-13 07:27:08,509 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 07:27:08,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 49 [2021-10-13 07:27:08,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-10-13 07:27:08,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-10-13 07:27:08,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 07:27:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:27:08,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:08,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2021-10-13 07:27:08,721 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:27:08,723 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 07:27:08,725 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:27:08,726 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:27:08,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 188 [2021-10-13 07:27:09,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:27:09,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:27:09,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:27:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:27:13,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066124955] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:13,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:27:13,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 9, 9] total 34 [2021-10-13 07:27:13,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125775580] [2021-10-13 07:27:13,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-13 07:27:13,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:27:13,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-13 07:27:13,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=947, Unknown=2, NotChecked=0, Total=1122 [2021-10-13 07:27:13,024 INFO L87 Difference]: Start difference. First operand 65 states and 90 transitions. Second operand has 34 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 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 07:27:16,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:27:16,454 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2021-10-13 07:27:16,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 07:27:16,454 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 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) Word has length 29 [2021-10-13 07:27:16,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:27:16,455 INFO L225 Difference]: With dead ends: 95 [2021-10-13 07:27:16,455 INFO L226 Difference]: Without dead ends: 87 [2021-10-13 07:27:16,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 9388.3ms TimeCoverageRelationStatistics Valid=436, Invalid=1914, Unknown=2, NotChecked=0, Total=2352 [2021-10-13 07:27:16,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-13 07:27:16,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2021-10-13 07:27:16,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.3970588235294117) internal successors, (95), 68 states have internal predecessors, (95), 0 states have call successors, (0), 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 07:27:16,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 95 transitions. [2021-10-13 07:27:16,463 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 95 transitions. Word has length 29 [2021-10-13 07:27:16,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:27:16,464 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 95 transitions. [2021-10-13 07:27:16,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 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 07:27:16,464 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 95 transitions. [2021-10-13 07:27:16,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 07:27:16,466 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:27:16,466 INFO L512 BasicCegarLoop]: trace histogram [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, 1] [2021-10-13 07:27:16,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:16,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:16,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-13 07:27:17,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:27:17,070 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:27:17,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:27:17,071 INFO L82 PathProgramCache]: Analyzing trace with hash 409263058, now seen corresponding path program 2 times [2021-10-13 07:27:17,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:27:17,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703265867] [2021-10-13 07:27:17,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:27:17,071 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:27:17,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:27:17,083 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:27:17,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 07:27:17,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:27:17,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:27:17,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:27:17,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:17,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:27:17,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:27:17,605 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:27:17,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-13 07:27:17,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:27:17,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:27:17,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 07:27:17,888 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 07:27:17,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2021-10-13 07:27:18,078 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-10-13 07:27:18,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2021-10-13 07:27:18,847 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:27:18,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-13 07:27:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:27:18,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:21,027 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.base (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_int| ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset (_ bv3 32))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv2 32)) (= .cse0 (_ bv3 32))))) is different from false [2021-10-13 07:27:21,058 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:27:21,059 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-13 07:27:23,091 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.base_92 (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_13)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_92 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_92) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= (_ bv2 32) .cse0)))) is different from false [2021-10-13 07:27:25,138 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_92 (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_13)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_92 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_92) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv3 32)) (= .cse0 (_ bv2 32))))) is different from false [2021-10-13 07:27:25,150 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:27:25,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-13 07:27:27,190 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.base_92 (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_99 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_14)))) (store .cse2 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse2 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_99 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_99 (_ bv4 32)) v_DerPreprocessor_13))))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_92 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_92) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= (_ bv2 32) .cse0)))) is different from false [2021-10-13 07:27:27,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29939 treesize of output 29683 [2021-10-13 07:27:28,896 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:27:28,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703265867] [2021-10-13 07:27:28,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:27:28,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1431386998] [2021-10-13 07:27:28,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:27:28,898 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:27:28,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:27:28,908 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:27:28,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-13 07:27:29,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:27:29,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:27:29,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 07:27:29,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:29,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:27:29,673 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:27:29,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-10-13 07:27:29,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:27:29,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:27:29,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:27:29,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 07:27:29,864 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 07:27:29,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2021-10-13 07:27:30,008 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-10-13 07:27:30,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2021-10-13 07:27:30,710 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:27:30,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-13 07:27:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:27:30,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:30,816 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:27:30,817 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-13 07:27:32,850 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_15 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_99 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_15)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_99 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_99) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= (_ bv2 32) .cse0)))) is different from false [2021-10-13 07:27:34,899 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_99 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_15)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_99 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_99) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv2 32) .cse0) (= (_ bv3 32) .cse0)))) is different from false [2021-10-13 07:27:34,921 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:27:34,922 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-13 07:27:36,951 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_15 (_ BitVec 32)) (v_DerPreprocessor_16 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_106 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_99 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_16)))) (store .cse2 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse2 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_106 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_106 (_ bv4 32)) v_DerPreprocessor_15))))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_99 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_99) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= (_ bv2 32) .cse0)))) is different from false [2021-10-13 07:27:37,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1072 treesize of output 1064 [2021-10-13 07:27:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2021-10-13 07:27:38,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1431386998] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:38,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613577340] [2021-10-13 07:27:38,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:27:38,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:27:38,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:27:38,858 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:27:38,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 07:27:39,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:27:39,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:27:39,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 07:27:39,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:39,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:27:39,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:27:39,588 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:27:39,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-10-13 07:27:39,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:27:39,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:27:39,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 07:27:39,744 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 07:27:39,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2021-10-13 07:27:39,903 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-10-13 07:27:39,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2021-10-13 07:27:40,529 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:27:40,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-13 07:27:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:27:40,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:40,609 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:27:40,610 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-13 07:27:42,640 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.base_107 (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_17)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_107 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_107) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv2 32)) (= .cse0 (_ bv3 32))))) is different from false [2021-10-13 07:27:44,690 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_107 (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_17)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_107 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_107) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv2 32) .cse0) (= (_ bv3 32) .cse0)))) is different from false [2021-10-13 07:27:44,702 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:27:44,702 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-13 07:27:46,732 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.offset_114 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_107 (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32)) (v_DerPreprocessor_18 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_18)))) (store .cse2 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse2 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_114 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_114 (_ bv4 32)) v_DerPreprocessor_17))))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_107 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_107) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= (_ bv2 32) .cse0)))) is different from false [2021-10-13 07:27:46,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1904 treesize of output 1888 [2021-10-13 07:28:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2021-10-13 07:28:37,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613577340] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:28:37,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:28:37,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12] total 24 [2021-10-13 07:28:37,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440895393] [2021-10-13 07:28:37,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 07:28:37,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:28:37,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 07:28:37,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=233, Unknown=10, NotChecked=390, Total=702 [2021-10-13 07:28:37,286 INFO L87 Difference]: Start difference. First operand 69 states and 95 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 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 07:28:40,179 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ULTIMATE.start_main_~p~0.offset_114 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_107 (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32)) (v_DerPreprocessor_18 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_18)))) (store .cse2 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse2 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_114 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_114 (_ bv4 32)) v_DerPreprocessor_17))))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_107 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_107) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= (_ bv2 32) .cse0)))) (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~a~0.base)))))) (_ bv1 1))) (forall ((v_DerPreprocessor_15 (_ BitVec 32)) (v_DerPreprocessor_16 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_106 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_99 (_ BitVec 32))) (let ((.cse3 (select (select (let ((.cse4 (let ((.cse5 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_16)))) (store .cse5 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse5 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_106 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_106 (_ bv4 32)) v_DerPreprocessor_15))))) (store .cse4 v_ULTIMATE.start_main_~p~0.base_99 (store (select .cse4 v_ULTIMATE.start_main_~p~0.base_99) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse3) (= (_ bv2 32) .cse3)))) (not (= c_ULTIMATE.start_main_~t~0.base c_ULTIMATE.start_main_~a~0.base)) (= c_ULTIMATE.start_main_~p~0.offset c_ULTIMATE.start_main_~a~0.offset) (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base) (= (_ bv2 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset))) is different from false [2021-10-13 07:28:42,192 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ULTIMATE.start_main_~p~0.offset_114 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_107 (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32)) (v_DerPreprocessor_18 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_18)))) (store .cse2 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse2 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_114 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_114 (_ bv4 32)) v_DerPreprocessor_17))))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_107 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_107) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= (_ bv2 32) .cse0)))) (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (forall ((v_DerPreprocessor_15 (_ BitVec 32)) (v_DerPreprocessor_16 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_106 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_99 (_ BitVec 32))) (let ((.cse3 (select (select (let ((.cse4 (let ((.cse5 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_16)))) (store .cse5 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse5 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_106 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_106 (_ bv4 32)) v_DerPreprocessor_15))))) (store .cse4 v_ULTIMATE.start_main_~p~0.base_99 (store (select .cse4 v_ULTIMATE.start_main_~p~0.base_99) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse3) (= (_ bv2 32) .cse3)))) (not (= c_ULTIMATE.start_main_~t~0.base c_ULTIMATE.start_main_~a~0.base)) (= c_ULTIMATE.start_main_~p~0.offset c_ULTIMATE.start_main_~a~0.offset) (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base) (= (_ bv2 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset))) is different from false [2021-10-13 07:28:44,249 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (= (_ bv2 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset)) (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_99 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_15)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_99 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_99) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv2 32) .cse0) (= (_ bv3 32) .cse0)))) (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_107 (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32))) (let ((.cse2 (select (select (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_17)))) (store .cse3 v_ULTIMATE.start_main_~p~0.base_107 (store (select .cse3 v_ULTIMATE.start_main_~p~0.base_107) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv2 32) .cse2) (= (_ bv3 32) .cse2)))) (not (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base))) is different from false [2021-10-13 07:28:46,267 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ULTIMATE.start_main_~p~0.base_107 (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_17)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_107 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_107) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv2 32)) (= .cse0 (_ bv3 32))))) (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (= (_ bv2 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (forall ((v_DerPreprocessor_15 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_99 (_ BitVec 32))) (let ((.cse2 (select (select (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_15)))) (store .cse3 v_ULTIMATE.start_main_~p~0.base_99 (store (select .cse3 v_ULTIMATE.start_main_~p~0.base_99) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse2) (= (_ bv2 32) .cse2)))) (= (_ bv2 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset)) (not (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base))) is different from false [2021-10-13 07:28:48,419 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (exists ((v_ULTIMATE.start_main_~p~0.offset_94 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_88 (_ BitVec 32))) (and (= (_ bv2 32) (select (select |c_#memory_int| v_ULTIMATE.start_main_~p~0.base_88) v_ULTIMATE.start_main_~p~0.offset_94)) (not (= c_ULTIMATE.start_main_~a~0.base v_ULTIMATE.start_main_~p~0.base_88)))) (= (_ bv2 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset)) (forall ((ULTIMATE.start_main_~p~0.base (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_int| ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset (_ bv3 32))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv2 32)) (= .cse0 (_ bv3 32))))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32))) is different from false [2021-10-13 07:28:48,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:28:48,694 INFO L93 Difference]: Finished difference Result 107 states and 139 transitions. [2021-10-13 07:28:48,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 07:28:48,695 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 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 30 [2021-10-13 07:28:48,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:28:48,696 INFO L225 Difference]: With dead ends: 107 [2021-10-13 07:28:48,696 INFO L226 Difference]: Without dead ends: 103 [2021-10-13 07:28:48,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 126 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 15 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 30894.2ms TimeCoverageRelationStatistics Valid=92, Invalid=295, Unknown=15, NotChecked=720, Total=1122 [2021-10-13 07:28:48,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-13 07:28:48,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 75. [2021-10-13 07:28:48,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.3918918918918919) internal successors, (103), 74 states have internal predecessors, (103), 0 states have call successors, (0), 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 07:28:48,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 103 transitions. [2021-10-13 07:28:48,704 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 103 transitions. Word has length 30 [2021-10-13 07:28:48,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:28:48,704 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 103 transitions. [2021-10-13 07:28:48,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 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 07:28:48,707 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 103 transitions. [2021-10-13 07:28:48,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 07:28:48,708 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:28:48,709 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 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 07:28:48,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:28:48,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 07:28:49,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 07:28:49,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:28:49,312 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:28:49,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:28:49,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1188172311, now seen corresponding path program 1 times [2021-10-13 07:28:49,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:28:49,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725235855] [2021-10-13 07:28:49,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:28:49,313 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:28:49,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:28:49,314 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:28:49,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 07:28:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:28:49,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 07:28:49,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:28:49,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:28:49,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:28:49,953 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:28:49,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-13 07:28:50,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:28:50,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:28:50,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 07:28:50,244 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 07:28:50,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2021-10-13 07:28:50,398 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-10-13 07:28:50,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2021-10-13 07:28:51,408 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:28:51,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-13 07:28:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:28:51,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:28:51,661 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:28:51,661 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-13 07:28:53,683 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_19)))) (store .cse1 ULTIMATE.start_main_~t~0.base (store (select .cse1 ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv1 32)) (= (_ bv3 32) .cse0)))) is different from false [2021-10-13 07:28:55,730 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_19)))) (store .cse1 ULTIMATE.start_main_~t~0.base (store (select .cse1 ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv1 32) .cse0) (= (_ bv3 32) .cse0)))) is different from false [2021-10-13 07:28:55,760 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:28:55,761 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-13 07:28:57,790 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_122 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_45 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_20)))) (store .cse2 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse2 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_122 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_122 (_ bv4 32)) v_DerPreprocessor_19))))) (store .cse1 v_ULTIMATE.start_main_~t~0.base_45 (store (select .cse1 v_ULTIMATE.start_main_~t~0.base_45) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= .cse0 (_ bv1 32))))) is different from false [2021-10-13 07:28:57,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14565 treesize of output 14437 [2021-10-13 07:28:58,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:28:58,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725235855] [2021-10-13 07:28:58,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:28:58,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1783282939] [2021-10-13 07:28:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:28:58,408 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:28:58,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:28:58,409 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:28:58,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-10-13 07:28:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:28:59,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 07:28:59,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:28:59,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:28:59,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:28:59,249 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:28:59,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-10-13 07:28:59,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:28:59,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:28:59,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 07:28:59,460 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 07:28:59,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 34 [2021-10-13 07:28:59,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-10-13 07:28:59,639 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-10-13 07:28:59,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2021-10-13 07:29:00,544 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:29:00,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-13 07:29:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:29:00,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:00,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 51 [2021-10-13 07:29:00,632 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:00,633 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-13 07:29:02,655 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_128 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_21)))) (store .cse1 v_arrayElimCell_128 (store (select .cse1 v_arrayElimCell_128) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) is different from false [2021-10-13 07:29:04,699 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_arrayElimCell_128 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_21)))) (store .cse1 v_arrayElimCell_128 (store (select .cse1 v_arrayElimCell_128) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= (_ bv1 32) .cse0)))) is different from false [2021-10-13 07:29:04,734 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:04,735 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-13 07:29:06,769 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_128 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_129 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_22)))) (store .cse2 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse2 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_129 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_129 (_ bv4 32)) v_DerPreprocessor_21))))) (store .cse1 v_arrayElimCell_128 (store (select .cse1 v_arrayElimCell_128) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) is different from false [2021-10-13 07:29:06,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2021 treesize of output 2005 [2021-10-13 07:29:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2021-10-13 07:29:26,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1783282939] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:29:26,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621784342] [2021-10-13 07:29:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:26,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:29:26,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:29:26,090 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:29:26,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 07:29:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:26,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 07:29:26,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:26,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:29:26,773 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:29:26,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-13 07:29:26,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:29:26,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:29:26,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:29:26,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 07:29:27,045 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 07:29:27,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2021-10-13 07:29:27,215 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-10-13 07:29:27,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2021-10-13 07:29:28,093 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:29:28,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-13 07:29:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:29:28,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:30,167 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.base (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_int| ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset (_ bv3 32))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) is different from false [2021-10-13 07:29:30,187 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:30,188 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-13 07:29:32,214 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.base_128 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_23)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_128 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_128) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) is different from false [2021-10-13 07:29:34,265 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_128 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_23)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_128 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_128) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) is different from false [2021-10-13 07:29:34,301 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:34,302 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-13 07:29:36,334 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.offset_137 (_ BitVec 32)) (v_DerPreprocessor_24 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_128 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_24)))) (store .cse2 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse2 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_137 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_137 (_ bv4 32)) v_DerPreprocessor_23))))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_128 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_128) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) is different from false [2021-10-13 07:29:36,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3541 treesize of output 3509 [2021-10-13 07:29:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2021-10-13 07:29:59,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621784342] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:29:59,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:29:59,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12] total 25 [2021-10-13 07:29:59,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581686678] [2021-10-13 07:29:59,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 07:29:59,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:29:59,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 07:29:59,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=260, Unknown=11, NotChecked=410, Total=756 [2021-10-13 07:29:59,566 INFO L87 Difference]: Start difference. First operand 75 states and 103 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 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 07:30:05,980 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ULTIMATE.start_main_~p~0.offset_137 (_ BitVec 32)) (v_DerPreprocessor_24 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_128 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_24)))) (store .cse2 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse2 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_137 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_137 (_ bv4 32)) v_DerPreprocessor_23))))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_128 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_128) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~a~0.base)))))) (_ bv1 1))) (not (= c_ULTIMATE.start_main_~t~0.base c_ULTIMATE.start_main_~a~0.base)) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (= c_ULTIMATE.start_main_~p~0.offset c_ULTIMATE.start_main_~a~0.offset) (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base) (forall ((v_arrayElimCell_128 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_129 (_ BitVec 32))) (let ((.cse3 (select (select (let ((.cse4 (let ((.cse5 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_22)))) (store .cse5 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse5 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_129 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_129 (_ bv4 32)) v_DerPreprocessor_21))))) (store .cse4 v_arrayElimCell_128 (store (select .cse4 v_arrayElimCell_128) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse3 (_ bv1 32)) (= .cse3 (_ bv3 32)))))) is different from false [2021-10-13 07:30:08,044 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ULTIMATE.start_main_~p~0.offset_137 (_ BitVec 32)) (v_DerPreprocessor_24 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_128 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_24)))) (store .cse2 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse2 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_137 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_137 (_ bv4 32)) v_DerPreprocessor_23))))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_128 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_128) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (not (= c_ULTIMATE.start_main_~t~0.base c_ULTIMATE.start_main_~a~0.base)) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (= c_ULTIMATE.start_main_~p~0.offset c_ULTIMATE.start_main_~a~0.offset) (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base) (forall ((v_arrayElimCell_128 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_129 (_ BitVec 32))) (let ((.cse3 (select (select (let ((.cse4 (let ((.cse5 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_22)))) (store .cse5 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse5 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_129 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_129 (_ bv4 32)) v_DerPreprocessor_21))))) (store .cse4 v_arrayElimCell_128 (store (select .cse4 v_arrayElimCell_128) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse3 (_ bv1 32)) (= .cse3 (_ bv3 32)))))) is different from false [2021-10-13 07:30:10,065 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)) (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_arrayElimCell_128 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_21)))) (store .cse1 v_arrayElimCell_128 (store (select .cse1 v_arrayElimCell_128) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= (_ bv1 32) .cse0)))) (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_128 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32))) (let ((.cse2 (select (select (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_23)))) (store .cse3 v_ULTIMATE.start_main_~p~0.base_128 (store (select .cse3 v_ULTIMATE.start_main_~p~0.base_128) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse2 (_ bv1 32)) (= .cse2 (_ bv3 32))))) (not (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base))) is different from false [2021-10-13 07:30:12,185 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)) (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (forall ((v_ULTIMATE.start_main_~p~0.base_128 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_23)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_128 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_128) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= (_ bv2 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset)) (forall ((v_arrayElimCell_128 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32))) (let ((.cse2 (select (select (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_21)))) (store .cse3 v_arrayElimCell_128 (store (select .cse3 v_arrayElimCell_128) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse2 (_ bv1 32)) (= .cse2 (_ bv3 32))))) (not (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base))) is different from false [2021-10-13 07:30:14,312 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)) (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (exists ((v_ULTIMATE.start_main_~p~0.base_111 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_117 (_ BitVec 32))) (and (not (= c_ULTIMATE.start_main_~a~0.base v_ULTIMATE.start_main_~p~0.base_111)) (= (_ bv2 32) (select (select |c_#memory_int| v_ULTIMATE.start_main_~p~0.base_111) v_ULTIMATE.start_main_~p~0.offset_117)))) (forall ((ULTIMATE.start_main_~p~0.base (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_int| ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset (_ bv3 32))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32))) is different from false [2021-10-13 07:30:15,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:15,092 INFO L93 Difference]: Finished difference Result 123 states and 158 transitions. [2021-10-13 07:30:15,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 07:30:15,093 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 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 30 [2021-10-13 07:30:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:15,094 INFO L225 Difference]: With dead ends: 123 [2021-10-13 07:30:15,094 INFO L226 Difference]: Without dead ends: 119 [2021-10-13 07:30:15,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 126 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 15 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 35160.5ms TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=16, NotChecked=810, Total=1332 [2021-10-13 07:30:15,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-13 07:30:15,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 75. [2021-10-13 07:30:15,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.3918918918918919) internal successors, (103), 74 states have internal predecessors, (103), 0 states have call successors, (0), 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 07:30:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 103 transitions. [2021-10-13 07:30:15,101 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 103 transitions. Word has length 30 [2021-10-13 07:30:15,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:15,101 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 103 transitions. [2021-10-13 07:30:15,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 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 07:30:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 103 transitions. [2021-10-13 07:30:15,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 07:30:15,103 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:15,103 INFO L512 BasicCegarLoop]: trace histogram [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, 1] [2021-10-13 07:30:15,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:15,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:15,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:15,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:30:15,713 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:15,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:15,714 INFO L82 PathProgramCache]: Analyzing trace with hash 810617330, now seen corresponding path program 2 times [2021-10-13 07:30:15,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:30:15,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298867333] [2021-10-13 07:30:15,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:30:15,715 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:30:15,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:30:15,716 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:30:15,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 07:30:16,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:30:16,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:30:16,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:30:16,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:16,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:30:16,499 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:30:16,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-13 07:30:16,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:30:16,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:30:16,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:30:16,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 07:30:16,760 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 07:30:16,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2021-10-13 07:30:16,955 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-10-13 07:30:16,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2021-10-13 07:30:18,005 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:30:18,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-13 07:30:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:30:18,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:20,211 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.base (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_int| ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset (_ bv3 32))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) is different from false [2021-10-13 07:30:20,249 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:30:20,250 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-13 07:30:22,275 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_25 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_136 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_25)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_136 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_136) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= .cse0 (_ bv1 32))))) is different from false [2021-10-13 07:30:24,326 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_136 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv1 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_25)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_136 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_136) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) is different from false [2021-10-13 07:30:24,340 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:30:24,341 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-13 07:30:26,373 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.offset_145 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_136 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_26)))) (store .cse2 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse2 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_145 (_ bv1 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_145 (_ bv4 32)) v_DerPreprocessor_25))))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_136 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_136) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv1 32) .cse0) (= (_ bv3 32) .cse0)))) is different from false [2021-10-13 07:30:26,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15270 treesize of output 15142 [2021-10-13 07:30:27,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:30:27,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298867333] [2021-10-13 07:30:27,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:30:27,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [377204516] [2021-10-13 07:30:27,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:30:27,084 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:30:27,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:30:27,085 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:30:27,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-10-13 07:30:27,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:30:27,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:30:27,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 07:30:27,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:27,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:30:27,957 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:30:27,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-10-13 07:30:27,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:30:28,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:30:28,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:30:28,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 07:30:28,373 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:30:28,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-10-13 07:30:28,648 INFO L354 Elim1Store]: treesize reduction 32, result has 41.8 percent of original size [2021-10-13 07:30:28,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 40 [2021-10-13 07:30:29,705 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:30:29,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-10-13 07:30:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:30:29,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:29,857 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:30:29,858 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-13 07:30:31,896 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.base_143 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_27)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_143 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_143) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv3 32)) (= .cse0 (_ bv1 32))))) is different from false [2021-10-13 07:30:44,111 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:30:44,112 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-13 07:30:46,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28778 treesize of output 28522 [2021-10-13 07:30:48,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:30:48,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776457217] [2021-10-13 07:30:48,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:30:48,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:30:48,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:30:48,447 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:30:48,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 07:30:49,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:30:49,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:30:49,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 07:30:49,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:49,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:30:49,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:30:49,487 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:30:49,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-13 07:30:49,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:30:49,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:30:49,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 07:30:49,688 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 07:30:49,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2021-10-13 07:30:49,911 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-10-13 07:30:49,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2021-10-13 07:30:51,046 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:30:51,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-13 07:30:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:30:51,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:51,187 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:30:51,188 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-13 07:30:53,227 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.base_150 (_ BitVec 32)) (v_DerPreprocessor_29 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_29)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_150 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_150) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv3 32)) (= .cse0 (_ bv1 32))))) is different from false [2021-10-13 07:30:55,271 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_150 (_ BitVec 32)) (v_DerPreprocessor_29 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv1 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_29)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_150 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_150) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv3 32)) (= .cse0 (_ bv1 32))))) is different from false [2021-10-13 07:30:55,283 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:30:55,284 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-13 07:30:57,313 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.offset_158 (_ BitVec 32)) (v_DerPreprocessor_30 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_150 (_ BitVec 32)) (v_DerPreprocessor_29 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_30)))) (store .cse2 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse2 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_158 (_ bv1 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_158 (_ bv4 32)) v_DerPreprocessor_29))))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_150 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_150) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= .cse0 (_ bv1 32))))) is different from false [2021-10-13 07:30:57,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1073 treesize of output 1065 [2021-10-13 07:31:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2021-10-13 07:31:00,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776457217] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:31:00,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 07:31:00,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 07:31:00,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081742874] [2021-10-13 07:31:00,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 07:31:00,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:31:00,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 07:31:00,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=551, Unknown=12, NotChecked=440, Total=1122 [2021-10-13 07:31:00,896 INFO L87 Difference]: Start difference. First operand 75 states and 103 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 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 07:31:06,893 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~a~0.base)))))) (_ bv1 1))) (not (= c_ULTIMATE.start_main_~t~0.base c_ULTIMATE.start_main_~a~0.base)) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (= c_ULTIMATE.start_main_~p~0.offset c_ULTIMATE.start_main_~a~0.offset) (forall ((v_ULTIMATE.start_main_~p~0.offset_158 (_ BitVec 32)) (v_DerPreprocessor_30 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_150 (_ BitVec 32)) (v_DerPreprocessor_29 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_30)))) (store .cse2 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse2 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_158 (_ bv1 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_158 (_ bv4 32)) v_DerPreprocessor_29))))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_150 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_150) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= .cse0 (_ bv1 32))))) (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base)) is different from false [2021-10-13 07:31:08,958 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (not (= c_ULTIMATE.start_main_~t~0.base c_ULTIMATE.start_main_~a~0.base)) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (= c_ULTIMATE.start_main_~p~0.offset c_ULTIMATE.start_main_~a~0.offset) (forall ((v_ULTIMATE.start_main_~p~0.offset_158 (_ BitVec 32)) (v_DerPreprocessor_30 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_150 (_ BitVec 32)) (v_DerPreprocessor_29 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_30)))) (store .cse2 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse2 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_158 (_ bv1 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_158 (_ bv4 32)) v_DerPreprocessor_29))))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_150 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_150) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= .cse0 (_ bv1 32))))) (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base)) is different from false [2021-10-13 07:31:10,972 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)) (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_150 (_ BitVec 32)) (v_DerPreprocessor_29 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv1 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_29)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_150 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_150) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv3 32)) (= .cse0 (_ bv1 32))))) (not (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base))) is different from false [2021-10-13 07:31:13,099 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)) (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (forall ((v_ULTIMATE.start_main_~p~0.base_150 (_ BitVec 32)) (v_DerPreprocessor_29 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_29)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_150 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_150) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv3 32)) (= .cse0 (_ bv1 32))))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (not (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base))) is different from false [2021-10-13 07:31:15,195 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)) (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (forall ((ULTIMATE.start_main_~p~0.base (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_int| ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset (_ bv3 32))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) (exists ((v_ULTIMATE.start_main_~p~0.base_132 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_140 (_ BitVec 32))) (and (= (select (select |c_#memory_int| v_ULTIMATE.start_main_~p~0.base_132) v_ULTIMATE.start_main_~p~0.offset_140) (_ bv1 32)) (not (= c_ULTIMATE.start_main_~a~0.base v_ULTIMATE.start_main_~p~0.base_132)))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32))) is different from false [2021-10-13 07:31:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:31:15,805 INFO L93 Difference]: Finished difference Result 122 states and 159 transitions. [2021-10-13 07:31:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 07:31:15,806 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 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 30 [2021-10-13 07:31:15,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:31:15,807 INFO L225 Difference]: With dead ends: 122 [2021-10-13 07:31:15,807 INFO L226 Difference]: Without dead ends: 118 [2021-10-13 07:31:15,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 43989.5ms TimeCoverageRelationStatistics Valid=137, Invalid=600, Unknown=17, NotChecked=806, Total=1560 [2021-10-13 07:31:15,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-13 07:31:15,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 78. [2021-10-13 07:31:15,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.3896103896103895) internal successors, (107), 77 states have internal predecessors, (107), 0 states have call successors, (0), 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 07:31:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 107 transitions. [2021-10-13 07:31:15,814 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 107 transitions. Word has length 30 [2021-10-13 07:31:15,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:31:15,814 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 107 transitions. [2021-10-13 07:31:15,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 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 07:31:15,815 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 107 transitions. [2021-10-13 07:31:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 07:31:15,816 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:31:15,817 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:31:15,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-13 07:31:16,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 07:31:16,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-10-13 07:31:16,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:31:16,424 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:31:16,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:31:16,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1773423575, now seen corresponding path program 1 times [2021-10-13 07:31:16,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:31:16,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629860132] [2021-10-13 07:31:16,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:16,425 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:31:16,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:31:16,426 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:31:16,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 07:31:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:17,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 07:31:17,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:17,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:31:17,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:31:17,352 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 07:31:17,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 75 [2021-10-13 07:31:17,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2021-10-13 07:31:17,378 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 07:31:17,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 44 [2021-10-13 07:31:17,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-10-13 07:31:17,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-13 07:31:17,577 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:31:17,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-10-13 07:31:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:31:17,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:17,859 INFO L354 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2021-10-13 07:31:17,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 86 [2021-10-13 07:31:17,863 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:31:17,864 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-13 07:31:17,867 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:31:17,867 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-13 07:31:18,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 243 [2021-10-13 07:31:18,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 545 treesize of output 521 [2021-10-13 07:31:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:31:18,803 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:31:18,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629860132] [2021-10-13 07:31:18,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629860132] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:31:18,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2081351836] [2021-10-13 07:31:18,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:18,804 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:31:18,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:31:18,804 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:31:18,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-10-13 07:31:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:19,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 07:31:19,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:19,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:31:19,949 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:31:19,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-10-13 07:31:20,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:31:20,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-13 07:31:20,259 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 07:31:20,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 72 [2021-10-13 07:31:20,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2021-10-13 07:31:20,290 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 07:31:20,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 49 [2021-10-13 07:31:20,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-10-13 07:31:20,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-10-13 07:31:20,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 07:31:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:31:20,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:20,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2021-10-13 07:31:20,649 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:31:20,649 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 07:31:20,652 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:31:20,652 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:31:20,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 77 [2021-10-13 07:31:20,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:20,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:20,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:31:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:31:25,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2081351836] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:31:25,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091428389] [2021-10-13 07:31:25,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:25,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:31:25,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:31:25,286 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:31:25,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-13 07:31:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:26,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 07:31:26,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:26,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:31:26,302 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:31:26,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-10-13 07:31:26,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-13 07:31:26,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:31:26,468 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 07:31:26,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 72 [2021-10-13 07:31:26,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2021-10-13 07:31:26,499 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 07:31:26,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 49 [2021-10-13 07:31:26,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-10-13 07:31:26,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-10-13 07:31:26,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 07:31:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:31:26,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:26,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2021-10-13 07:31:26,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:31:26,657 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 07:31:26,660 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:31:26,661 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:31:26,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 77 [2021-10-13 07:31:26,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:26,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:26,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:31:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:31:31,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091428389] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:31:31,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:31:31,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 9, 9] total 29 [2021-10-13 07:31:31,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992264418] [2021-10-13 07:31:31,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 07:31:31,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:31:31,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 07:31:31,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=695, Unknown=2, NotChecked=0, Total=812 [2021-10-13 07:31:31,209 INFO L87 Difference]: Start difference. First operand 78 states and 107 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 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 07:31:35,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:31:35,813 INFO L93 Difference]: Finished difference Result 104 states and 136 transitions. [2021-10-13 07:31:35,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 07:31:35,814 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 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 31 [2021-10-13 07:31:35,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:31:35,815 INFO L225 Difference]: With dead ends: 104 [2021-10-13 07:31:35,815 INFO L226 Difference]: Without dead ends: 90 [2021-10-13 07:31:35,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 149 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 10728.1ms TimeCoverageRelationStatistics Valid=351, Invalid=1539, Unknown=2, NotChecked=0, Total=1892 [2021-10-13 07:31:35,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-13 07:31:35,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2021-10-13 07:31:35,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 75 states have internal predecessors, (103), 0 states have call successors, (0), 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 07:31:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 103 transitions. [2021-10-13 07:31:35,822 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 103 transitions. Word has length 31 [2021-10-13 07:31:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:31:35,822 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 103 transitions. [2021-10-13 07:31:35,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 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 07:31:35,823 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 103 transitions. [2021-10-13 07:31:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 07:31:35,823 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:31:35,824 INFO L512 BasicCegarLoop]: trace histogram [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, 1] [2021-10-13 07:31:35,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-13 07:31:36,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-10-13 07:31:36,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-10-13 07:31:36,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:31:36,426 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:31:36,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:31:36,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1786512979, now seen corresponding path program 1 times [2021-10-13 07:31:36,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:31:36,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099729144] [2021-10-13 07:31:36,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:36,427 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:31:36,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:31:36,428 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:31:36,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-13 07:31:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:37,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 07:31:37,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:37,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:31:37,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:31:37,339 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:31:37,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-13 07:31:37,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:37,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:31:37,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 07:31:37,595 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 07:31:37,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2021-10-13 07:31:37,780 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-10-13 07:31:37,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2021-10-13 07:31:38,481 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:31:38,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-13 07:31:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:31:38,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:38,727 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:31:38,728 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-10-13 07:31:40,747 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~t~0.base (_ BitVec 32)) (v_DerPreprocessor_37 (_ BitVec 32))) (not (= (_ bv1 32) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_37)))) (store .cse0 ULTIMATE.start_main_~t~0.base (store (select .cse0 ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset)))) is different from false [2021-10-13 07:31:42,774 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32)) (v_DerPreprocessor_37 (_ BitVec 32))) (not (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_37)))) (store .cse0 ULTIMATE.start_main_~t~0.base (store (select .cse0 ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) is different from false [2021-10-13 07:31:42,786 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:31:42,787 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-13 07:31:44,834 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~t~0.base_67 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_191 (_ BitVec 32)) (v_DerPreprocessor_37 (_ BitVec 32)) (v_DerPreprocessor_38 (_ BitVec 32))) (not (= (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_38)))) (store .cse1 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse1 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_191 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_191 (_ bv4 32)) v_DerPreprocessor_37))))) (store .cse0 v_ULTIMATE.start_main_~t~0.base_67 (store (select .cse0 v_ULTIMATE.start_main_~t~0.base_67) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) is different from false [2021-10-13 07:31:44,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22392 treesize of output 22136 [2021-10-13 07:31:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2021-10-13 07:31:49,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:31:49,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099729144] [2021-10-13 07:31:49,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099729144] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:31:49,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [514386607] [2021-10-13 07:31:49,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:49,713 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:31:49,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:31:49,714 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:31:49,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-10-13 07:31:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:50,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 07:31:50,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:50,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:31:50,837 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:31:50,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-10-13 07:31:50,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:31:50,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:50,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:31:50,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 07:31:51,054 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 07:31:51,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 34 [2021-10-13 07:31:51,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-10-13 07:31:51,247 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-10-13 07:31:51,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2021-10-13 07:31:52,147 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-10-13 07:31:52,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 45 [2021-10-13 07:31:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:31:52,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:52,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-10-13 07:31:52,385 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:31:52,386 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-10-13 07:31:54,402 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_225 (_ BitVec 32)) (v_DerPreprocessor_39 (_ BitVec 32))) (not (= (_ bv1 32) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_39)))) (store .cse0 v_arrayElimCell_225 (store (select .cse0 v_arrayElimCell_225) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset)))) is different from false [2021-10-13 07:31:56,443 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_225 (_ BitVec 32)) (ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_DerPreprocessor_39 (_ BitVec 32))) (not (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_39)))) (store .cse0 v_arrayElimCell_225 (store (select .cse0 v_arrayElimCell_225) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) is different from false [2021-10-13 07:31:56,453 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:31:56,454 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-13 07:31:58,481 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_225 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_200 (_ BitVec 32)) (v_DerPreprocessor_40 (_ BitVec 32)) (v_DerPreprocessor_39 (_ BitVec 32))) (not (= (_ bv1 32) (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_40)))) (store .cse1 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse1 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_200 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_200 (_ bv4 32)) v_DerPreprocessor_39))))) (store .cse0 v_arrayElimCell_225 (store (select .cse0 v_arrayElimCell_225) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset)))) is different from false [2021-10-13 07:31:58,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2884 treesize of output 2852 [2021-10-13 07:32:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2021-10-13 07:32:01,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [514386607] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:32:01,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772168248] [2021-10-13 07:32:01,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:32:01,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:32:01,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:32:01,008 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:32:01,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-13 07:32:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:32:01,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 07:32:01,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:32:01,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:32:01,968 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:32:01,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-10-13 07:32:01,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:32:02,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:32:02,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:32:02,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 07:32:02,154 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 07:32:02,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2021-10-13 07:32:02,321 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-10-13 07:32:02,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2021-10-13 07:32:02,958 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:32:02,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-13 07:32:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:32:02,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:32:05,024 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.base (_ BitVec 32))) (not (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset (_ bv3 32))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) is different from false [2021-10-13 07:32:05,039 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:32:05,040 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-10-13 07:32:07,058 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_41 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_199 (_ BitVec 32))) (not (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_41)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_199 (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_199) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) is different from false [2021-10-13 07:32:09,090 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_DerPreprocessor_41 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_199 (_ BitVec 32))) (not (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_41)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_199 (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_199) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) is different from false [2021-10-13 07:32:09,102 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:32:09,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-13 07:32:11,137 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_42 (_ BitVec 32)) (v_DerPreprocessor_41 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_209 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_199 (_ BitVec 32))) (not (= (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_42)))) (store .cse1 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse1 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_209 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_209 (_ bv4 32)) v_DerPreprocessor_41))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_199 (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_199) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) is different from false [2021-10-13 07:32:11,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5478 treesize of output 5414 [2021-10-13 07:32:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2021-10-13 07:32:14,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772168248] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:32:14,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:32:14,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10, 10, 12, 11] total 29 [2021-10-13 07:32:14,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283610138] [2021-10-13 07:32:14,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 07:32:14,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:32:14,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 07:32:14,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=289, Unknown=11, NotChecked=430, Total=812 [2021-10-13 07:32:14,123 INFO L87 Difference]: Start difference. First operand 76 states and 103 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 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 07:32:17,172 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~a~0.base)))))) (_ bv1 1))) (not (= c_ULTIMATE.start_main_~t~0.base c_ULTIMATE.start_main_~a~0.base)) (= c_ULTIMATE.start_main_~p~0.offset c_ULTIMATE.start_main_~a~0.offset) (forall ((v_DerPreprocessor_42 (_ BitVec 32)) (v_DerPreprocessor_41 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_209 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_199 (_ BitVec 32))) (not (= (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_42)))) (store .cse1 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse1 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_209 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_209 (_ bv4 32)) v_DerPreprocessor_41))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_199 (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_199) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) (forall ((v_ULTIMATE.start_main_~t~0.base_67 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_191 (_ BitVec 32)) (v_DerPreprocessor_37 (_ BitVec 32)) (v_DerPreprocessor_38 (_ BitVec 32))) (not (= (select (select (let ((.cse2 (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_38)))) (store .cse3 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse3 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_191 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_191 (_ bv4 32)) v_DerPreprocessor_37))))) (store .cse2 v_ULTIMATE.start_main_~t~0.base_67 (store (select .cse2 v_ULTIMATE.start_main_~t~0.base_67) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) (forall ((v_arrayElimCell_225 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_200 (_ BitVec 32)) (v_DerPreprocessor_40 (_ BitVec 32)) (v_DerPreprocessor_39 (_ BitVec 32))) (not (= (_ bv1 32) (select (select (let ((.cse4 (let ((.cse5 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_40)))) (store .cse5 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse5 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_200 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_200 (_ bv4 32)) v_DerPreprocessor_39))))) (store .cse4 v_arrayElimCell_225 (store (select .cse4 v_arrayElimCell_225) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset)))) (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base) (= (_ bv2 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset))) is different from false [2021-10-13 07:32:19,198 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (not (= c_ULTIMATE.start_main_~t~0.base c_ULTIMATE.start_main_~a~0.base)) (= c_ULTIMATE.start_main_~p~0.offset c_ULTIMATE.start_main_~a~0.offset) (forall ((v_DerPreprocessor_42 (_ BitVec 32)) (v_DerPreprocessor_41 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_209 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_199 (_ BitVec 32))) (not (= (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_42)))) (store .cse1 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse1 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_209 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_209 (_ bv4 32)) v_DerPreprocessor_41))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_199 (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_199) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) (forall ((v_ULTIMATE.start_main_~t~0.base_67 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_191 (_ BitVec 32)) (v_DerPreprocessor_37 (_ BitVec 32)) (v_DerPreprocessor_38 (_ BitVec 32))) (not (= (select (select (let ((.cse2 (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_38)))) (store .cse3 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse3 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_191 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_191 (_ bv4 32)) v_DerPreprocessor_37))))) (store .cse2 v_ULTIMATE.start_main_~t~0.base_67 (store (select .cse2 v_ULTIMATE.start_main_~t~0.base_67) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) (forall ((v_arrayElimCell_225 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_200 (_ BitVec 32)) (v_DerPreprocessor_40 (_ BitVec 32)) (v_DerPreprocessor_39 (_ BitVec 32))) (not (= (_ bv1 32) (select (select (let ((.cse4 (let ((.cse5 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_40)))) (store .cse5 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse5 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_200 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_200 (_ bv4 32)) v_DerPreprocessor_39))))) (store .cse4 v_arrayElimCell_225 (store (select .cse4 v_arrayElimCell_225) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset)))) (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base) (= (_ bv2 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset))) is different from false [2021-10-13 07:32:21,253 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32)) (v_DerPreprocessor_37 (_ BitVec 32))) (not (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_37)))) (store .cse0 ULTIMATE.start_main_~t~0.base (store (select .cse0 ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (= (_ bv2 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset)) (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_DerPreprocessor_41 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_199 (_ BitVec 32))) (not (= (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_41)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_199 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_199) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) (not (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base)) (forall ((v_arrayElimCell_225 (_ BitVec 32)) (ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_DerPreprocessor_39 (_ BitVec 32))) (not (= (select (select (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_39)))) (store .cse2 v_arrayElimCell_225 (store (select .cse2 v_arrayElimCell_225) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32))))) is different from false [2021-10-13 07:32:23,279 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((ULTIMATE.start_main_~t~0.base (_ BitVec 32)) (v_DerPreprocessor_37 (_ BitVec 32))) (not (= (_ bv1 32) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_37)))) (store .cse0 ULTIMATE.start_main_~t~0.base (store (select .cse0 ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset)))) (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (forall ((v_DerPreprocessor_41 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_199 (_ BitVec 32))) (not (= (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_41)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_199 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_199) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) (= (_ bv2 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (forall ((v_arrayElimCell_225 (_ BitVec 32)) (v_DerPreprocessor_39 (_ BitVec 32))) (not (= (_ bv1 32) (select (select (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_39)))) (store .cse2 v_arrayElimCell_225 (store (select .cse2 v_arrayElimCell_225) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset)))) (= (_ bv2 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset)) (not (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base))) is different from false [2021-10-13 07:32:25,427 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((v_ULTIMATE.start_main_~p~0.offset_185 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_178 (_ BitVec 32))) (and (= (select (select |c_#memory_int| v_ULTIMATE.start_main_~p~0.base_178) v_ULTIMATE.start_main_~p~0.offset_185) (_ bv2 32)) (not (= c_ULTIMATE.start_main_~a~0.base v_ULTIMATE.start_main_~p~0.base_178)))) (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (= (_ bv2 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset)) (forall ((ULTIMATE.start_main_~p~0.base (_ BitVec 32))) (not (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset (_ bv3 32))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32))) is different from false [2021-10-13 07:32:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:32:26,235 INFO L93 Difference]: Finished difference Result 134 states and 169 transitions. [2021-10-13 07:32:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 07:32:26,236 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 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 32 [2021-10-13 07:32:26,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:32:26,237 INFO L225 Difference]: With dead ends: 134 [2021-10-13 07:32:26,237 INFO L226 Difference]: Without dead ends: 126 [2021-10-13 07:32:26,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 150 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 15 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 37516.9ms TimeCoverageRelationStatistics Valid=132, Invalid=464, Unknown=16, NotChecked=870, Total=1482 [2021-10-13 07:32:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-13 07:32:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 83. [2021-10-13 07:32:26,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.3658536585365855) internal successors, (112), 82 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:32:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 112 transitions. [2021-10-13 07:32:26,247 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 112 transitions. Word has length 32 [2021-10-13 07:32:26,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:32:26,247 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 112 transitions. [2021-10-13 07:32:26,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 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 07:32:26,247 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 112 transitions. [2021-10-13 07:32:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 07:32:26,248 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:32:26,248 INFO L512 BasicCegarLoop]: trace histogram [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, 1] [2021-10-13 07:32:26,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-13 07:32:26,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-13 07:32:26,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-10-13 07:32:26,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:32:26,849 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:32:26,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:32:26,850 INFO L82 PathProgramCache]: Analyzing trace with hash -761810003, now seen corresponding path program 2 times [2021-10-13 07:32:26,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:32:26,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651426235] [2021-10-13 07:32:26,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:32:26,850 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:32:26,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:32:26,851 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:32:26,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-13 07:32:27,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:32:27,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:32:27,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 07:32:27,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:32:27,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:32:27,990 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:32:27,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-10-13 07:32:28,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:32:28,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-10-13 07:32:28,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:32:28,318 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-10-13 07:32:28,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2021-10-13 07:32:28,375 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-13 07:32:28,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 53 [2021-10-13 07:32:28,428 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 07:32:28,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 52 [2021-10-13 07:32:28,666 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-10-13 07:32:28,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 133 [2021-10-13 07:32:28,703 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-10-13 07:32:28,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 156 [2021-10-13 07:32:28,737 INFO L354 Elim1Store]: treesize reduction 75, result has 20.2 percent of original size [2021-10-13 07:32:28,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 146 [2021-10-13 07:32:29,073 INFO L354 Elim1Store]: treesize reduction 112, result has 15.8 percent of original size [2021-10-13 07:32:29,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 304 treesize of output 153 [2021-10-13 07:32:29,140 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-10-13 07:32:29,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 219 treesize of output 146 [2021-10-13 07:32:29,169 INFO L354 Elim1Store]: treesize reduction 105, result has 12.5 percent of original size [2021-10-13 07:32:29,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 119 [2021-10-13 07:32:29,485 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-10-13 07:32:29,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 74 [2021-10-13 07:32:29,495 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:32:29,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 45 [2021-10-13 07:32:29,706 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-13 07:32:29,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-10-13 07:32:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:32:29,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:32:30,018 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:32:30,019 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-10-13 07:32:30,023 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:32:30,023 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-10-13 07:32:30,222 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:32:30,223 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 140 [2021-10-13 07:32:31,498 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:32:31,499 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-10-13 07:32:31,860 INFO L354 Elim1Store]: treesize reduction 4, result has 95.3 percent of original size [2021-10-13 07:32:31,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1164 treesize of output 1159 [2021-10-13 07:32:31,880 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:32:31,883 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1140 [2021-10-13 07:32:59,911 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_43 (_ BitVec 32)) (v_DerPreprocessor_46 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_76 (_ BitVec 32)) (v_DerPreprocessor_47 (_ BitVec 32)) (v_DerPreprocessor_44 (_ BitVec 32))) (let ((.cse3 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32))) (.cse4 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse1 (select (select (let ((.cse5 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset v_DerPreprocessor_47) .cse3 (_ bv0 32))))) (store .cse5 v_ULTIMATE.start_main_~t~0.base_76 (store (select .cse5 v_ULTIMATE.start_main_~t~0.base_76) (_ bv0 32) v_DerPreprocessor_44))) c_ULTIMATE.start_main_~a~0.base) .cse4)) (.cse0 (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset v_DerPreprocessor_46) .cse3 v_ULTIMATE.start_main_~t~0.base_76)))) (store .cse2 v_ULTIMATE.start_main_~t~0.base_76 (store (select .cse2 v_ULTIMATE.start_main_~t~0.base_76) (_ bv0 32) v_DerPreprocessor_43))) c_ULTIMATE.start_main_~a~0.base) .cse4))) (or (and (or (not (= v_ULTIMATE.start_main_~t~0.base_76 .cse0)) (not (= .cse1 (_ bv0 32)))) (= .cse1 c_ULTIMATE.start_main_~p~0.offset) (= c_ULTIMATE.start_main_~p~0.base .cse0)) (and (= .cse1 c_ULTIMATE.start_main_~a~0.offset) (= c_ULTIMATE.start_main_~a~0.base .cse0)) (and (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (= c_ULTIMATE.start_main_~a~0.base v_ULTIMATE.start_main_~t~0.base_76)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_76)))))))) is different from false [2021-10-13 07:32:59,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19994 treesize of output 19706 [2021-10-13 07:33:00,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38358 treesize of output 38070 [2021-10-13 07:33:01,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:33:01,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651426235] [2021-10-13 07:33:01,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:33:01,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1947430224] [2021-10-13 07:33:01,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:33:01,656 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:33:01,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:33:01,657 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:33:01,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-10-13 07:33:02,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:33:02,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:33:02,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-13 07:33:02,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:33:02,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:33:02,987 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:33:02,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-10-13 07:33:03,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:33:03,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-13 07:33:03,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:33:03,323 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-13 07:33:03,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2021-10-13 07:33:03,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:33:03,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-10-13 07:33:03,570 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-10-13 07:33:03,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 134 [2021-10-13 07:33:03,595 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-10-13 07:33:03,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 161 treesize of output 121 [2021-10-13 07:33:03,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 75 [2021-10-13 07:33:03,878 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 07:33:03,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 183 treesize of output 106 [2021-10-13 07:33:03,921 INFO L354 Elim1Store]: treesize reduction 53, result has 33.8 percent of original size [2021-10-13 07:33:03,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 135 [2021-10-13 07:33:03,984 INFO L354 Elim1Store]: treesize reduction 128, result has 12.9 percent of original size [2021-10-13 07:33:03,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 105 [2021-10-13 07:33:04,415 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:33:04,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 74 [2021-10-13 07:33:04,420 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:33:04,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 39 [2021-10-13 07:33:04,926 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:33:04,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-10-13 07:33:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:33:05,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:33:05,676 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:33:05,676 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-10-13 07:33:05,680 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:33:05,680 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-10-13 07:33:06,574 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:33:06,575 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 243 [2021-10-13 07:33:44,696 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:33:44,697 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 289 [2021-10-13 07:33:45,005 INFO L354 Elim1Store]: treesize reduction 4, result has 95.3 percent of original size [2021-10-13 07:33:45,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17181 treesize of output 16010 [2021-10-13 07:33:45,092 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:33:45,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14616 [2021-10-13 07:36:17,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13553 treesize of output 13361 [2021-10-13 07:36:17,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117532 treesize of output 115996 [2021-10-13 07:36:23,590 WARN L207 SmtUtils]: Spent 5.99 s on a formula simplification. DAG size of input: 991 DAG size of output: 981 [2021-10-13 07:36:23,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:36:23,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750938066] [2021-10-13 07:36:23,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:36:23,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:36:23,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:36:23,610 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:36:23,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-13 07:36:24,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:36:24,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:36:24,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-13 07:36:24,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:24,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:36:24,819 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:36:24,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-10-13 07:36:25,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:36:25,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-10-13 07:36:25,405 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-13 07:36:25,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 51 [2021-10-13 07:36:25,442 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 07:36:25,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 50 [2021-10-13 07:36:25,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:36:25,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-10-13 07:36:25,825 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-10-13 07:36:25,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 142 [2021-10-13 07:36:25,868 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-10-13 07:36:25,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 159 [2021-10-13 07:36:25,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 109 [2021-10-13 07:36:26,358 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 07:36:26,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 203 treesize of output 110 [2021-10-13 07:36:26,393 INFO L354 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2021-10-13 07:36:26,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 139 [2021-10-13 07:36:26,443 INFO L354 Elim1Store]: treesize reduction 128, result has 12.9 percent of original size [2021-10-13 07:36:26,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 109 [2021-10-13 07:36:27,109 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:36:27,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 61 [2021-10-13 07:36:27,116 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:36:27,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 39 [2021-10-13 07:36:27,438 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 07:36:27,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 25 [2021-10-13 07:36:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:36:27,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:27,532 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:36:27,533 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-10-13 07:36:27,537 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:36:27,538 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-10-13 07:36:27,701 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:36:27,702 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 140 [2021-10-13 07:36:28,916 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:36:28,917 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 182 [2021-10-13 07:36:29,217 INFO L354 Elim1Store]: treesize reduction 4, result has 95.3 percent of original size [2021-10-13 07:36:29,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7454 treesize of output 6903 [2021-10-13 07:36:29,251 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:36:29,257 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4279 [2021-10-13 07:36:39,042 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_43 (_ BitVec 32)) (v_DerPreprocessor_57 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_79 (_ BitVec 32)) (v_DerPreprocessor_44 (_ BitVec 32)) (v_DerPreprocessor_56 (_ BitVec 32))) (let ((.cse3 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32))) (.cse4 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse0 (select (select (let ((.cse5 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset v_DerPreprocessor_56) .cse3 v_ULTIMATE.start_main_~t~0.base_79)))) (store .cse5 v_ULTIMATE.start_main_~t~0.base_79 (store (select .cse5 v_ULTIMATE.start_main_~t~0.base_79) (_ bv0 32) v_DerPreprocessor_43))) c_ULTIMATE.start_main_~a~0.base) .cse4)) (.cse1 (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset v_DerPreprocessor_57) .cse3 (_ bv0 32))))) (store .cse2 v_ULTIMATE.start_main_~t~0.base_79 (store (select .cse2 v_ULTIMATE.start_main_~t~0.base_79) (_ bv0 32) v_DerPreprocessor_44))) c_ULTIMATE.start_main_~a~0.base) .cse4))) (or (and (or (not (= .cse0 v_ULTIMATE.start_main_~t~0.base_79)) (not (= (_ bv0 32) .cse1))) (= c_ULTIMATE.start_main_~p~0.offset .cse1) (= .cse0 c_ULTIMATE.start_main_~p~0.base)) (and (= c_ULTIMATE.start_main_~a~0.base v_ULTIMATE.start_main_~t~0.base_79) (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset)) (and (= .cse0 c_ULTIMATE.start_main_~a~0.base) (= .cse1 c_ULTIMATE.start_main_~a~0.offset)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_79))))))))) is different from false [2021-10-13 07:36:39,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2845 treesize of output 2809 [2021-10-13 07:36:39,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41453 treesize of output 40877 [2021-10-13 07:36:41,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:36:41,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:36:41,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 07:36:41,663 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 07:36:41,664 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 07:36:41,670 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:36:41,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-10-13 07:36:41,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:42,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:42,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:36:42,284 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:36:42,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:36:42 BoogieIcfgContainer [2021-10-13 07:36:42,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:36:42,301 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:36:42,301 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:36:42,301 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:36:42,302 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:25:50" (3/4) ... [2021-10-13 07:36:42,307 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:36:42,307 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:36:42,308 INFO L168 Benchmark]: Toolchain (without parser) took 654171.99 ms. Allocated memory was 60.8 MB in the beginning and 564.1 MB in the end (delta: 503.3 MB). Free memory was 39.4 MB in the beginning and 437.4 MB in the end (delta: -398.0 MB). Peak memory consumption was 104.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:36:42,309 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 60.8 MB. Free memory is still 42.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:36:42,309 INFO L168 Benchmark]: CACSL2BoogieTranslator took 820.13 ms. Allocated memory is still 60.8 MB. Free memory was 39.3 MB in the beginning and 35.6 MB in the end (delta: 3.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:36:42,309 INFO L168 Benchmark]: Boogie Procedure Inliner took 111.64 ms. Allocated memory is still 60.8 MB. Free memory was 35.6 MB in the beginning and 33.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:36:42,310 INFO L168 Benchmark]: Boogie Preprocessor took 81.12 ms. Allocated memory is still 60.8 MB. Free memory was 33.0 MB in the beginning and 30.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:36:42,310 INFO L168 Benchmark]: RCFGBuilder took 981.59 ms. Allocated memory was 60.8 MB in the beginning and 86.0 MB in the end (delta: 25.2 MB). Free memory was 30.6 MB in the beginning and 54.7 MB in the end (delta: -24.1 MB). Peak memory consumption was 13.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:36:42,311 INFO L168 Benchmark]: TraceAbstraction took 652160.45 ms. Allocated memory was 86.0 MB in the beginning and 564.1 MB in the end (delta: 478.2 MB). Free memory was 54.3 MB in the beginning and 437.4 MB in the end (delta: -383.1 MB). Peak memory consumption was 370.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:36:42,311 INFO L168 Benchmark]: Witness Printer took 6.51 ms. Allocated memory is still 564.1 MB. Free memory is still 437.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:36:42,313 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 60.8 MB. Free memory is still 42.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 820.13 ms. Allocated memory is still 60.8 MB. Free memory was 39.3 MB in the beginning and 35.6 MB in the end (delta: 3.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 111.64 ms. Allocated memory is still 60.8 MB. Free memory was 35.6 MB in the beginning and 33.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 81.12 ms. Allocated memory is still 60.8 MB. Free memory was 33.0 MB in the beginning and 30.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 981.59 ms. Allocated memory was 60.8 MB in the beginning and 86.0 MB in the end (delta: 25.2 MB). Free memory was 30.6 MB in the beginning and 54.7 MB in the end (delta: -24.1 MB). Peak memory consumption was 13.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 652160.45 ms. Allocated memory was 86.0 MB in the beginning and 564.1 MB in the end (delta: 478.2 MB). Free memory was 54.3 MB in the beginning and 437.4 MB in the end (delta: -383.1 MB). Peak memory consumption was 370.1 MB. Max. memory is 16.1 GB. * Witness Printer took 6.51 ms. Allocated memory is still 564.1 MB. Free memory is still 437.4 MB. There was no memory consumed. 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 - UnprovableResult [Line: 620]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L552] struct TreeNode* root = malloc(sizeof(*root)), *n; [L552] struct TreeNode* root = malloc(sizeof(*root)), *n; [L553] root->left = ((void *)0) [L554] root->right = ((void *)0) [L555] COND FALSE !(__VERIFIER_nondet_int()) [L574] n = ((void *)0) [L575] struct TreeNode* pred; [L576] COND TRUE \read(*root) [L577] pred = ((void *)0) [L578] n = root [L579] EXPR n->left [L579] n->left || n->right [L579] EXPR n->right [L579] n->left || n->right [L579] COND FALSE !(n->left || n->right) [L586] COND FALSE !(\read(*pred)) [L592] root = ((void *)0) [L576] COND FALSE !(\read(*root)) [L595] List a = (List) malloc(sizeof(struct node)); [L596] COND FALSE !(a == 0) [L597] List t; [L598] List p = a; [L599] COND FALSE !(__VERIFIER_nondet_int()) [L606] COND TRUE __VERIFIER_nondet_int() [L607] p->h = 2 [L608] t = (List) malloc(sizeof(struct node)) [L609] COND FALSE !(t == 0) [L610] p->n = t [L611] EXPR p->n [L611] p = p->n [L606] COND TRUE __VERIFIER_nondet_int() [L607] p->h = 2 [L608] t = (List) malloc(sizeof(struct node)) [L609] COND FALSE !(t == 0) [L610] p->n = t [L611] EXPR p->n [L611] p = p->n [L606] COND FALSE !(__VERIFIER_nondet_int()) [L613] p->h = 3 [L614] p = a [L615] EXPR p->h [L615] COND TRUE p->h == 2 [L616] EXPR p->n [L616] p = p->n [L615] EXPR p->h [L615] COND FALSE !(p->h == 2) [L617] EXPR p->h [L617] COND FALSE !(p->h == 1) [L619] EXPR p->h [L619] COND TRUE p->h != 3 [L620] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 652056.0ms, OverallIterations: 15, TraceHistogramMax: 2, EmptinessCheckTime: 34.6ms, AutomataDifference: 81232.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 686 SDtfs, 631 SDslu, 4712 SDs, 0 SdLazy, 2708 SolverSat, 290 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 29401.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1644 GetRequests, 1287 SyntacticMatches, 63 SemanticMatches, 294 ConstructedPredicates, 62 IntricatePredicates, 0 DeprecatedPredicates, 2148 ImplicationChecksByTransitivity, 212883.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=14, InterpolantAutomatonStates: 146, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 123.9ms AutomataMinimizationTime, 14 MinimizatonAttempts, 271 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 421.6ms SsaConstructionTime, 1745.4ms SatisfiabilityAnalysisTime, 242973.1ms InterpolantComputationTime, 722 NumberOfCodeBlocks, 722 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 1392 ConstructedInterpolants, 195 QuantifiedInterpolants, 14500 SizeOfPredicates, 257 NumberOfNonLiveVariables, 2386 ConjunctsInSsa, 406 ConjunctsInUnsatCore, 52 InterpolantComputations, 12 PerfectInterpolantSequences, 81/196 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 could not prove your program: unable to determine feasibility of some traces [2021-10-13 07:36:42,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5da12cd4-f969-430b-9352-47f2f2003450/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...