./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/alternating_list-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_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/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_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/alternating_list-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/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_8b002e43-bb15-4dd7-b70b-978592eb700f/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 083d10b9fe9751ef17a8be260d74adbbc426a982 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/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_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/alternating_list-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/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_8b002e43-bb15-4dd7-b70b-978592eb700f/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 083d10b9fe9751ef17a8be260d74adbbc426a982 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:43:09,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:43:09,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:43:09,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:43:09,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:43:09,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:43:09,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:43:09,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:43:09,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:43:09,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:43:09,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:43:09,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:43:09,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:43:09,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:43:09,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:43:09,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:43:09,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:43:09,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:43:09,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:43:09,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:43:09,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:43:09,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:43:09,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:43:09,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:43:09,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:43:09,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:43:09,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:43:09,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:43:09,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:43:09,595 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:43:09,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:43:09,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:43:09,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:43:09,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:43:09,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:43:09,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:43:09,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:43:09,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:43:09,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:43:09,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:43:09,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:43:09,610 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:43:09,661 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:43:09,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:43:09,664 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:43:09,664 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:43:09,665 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:43:09,665 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:43:09,665 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:43:09,666 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:43:09,666 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:43:09,666 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:43:09,668 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:43:09,668 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:43:09,668 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:43:09,669 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:43:09,669 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:43:09,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:43:09,670 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:43:09,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:43:09,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:43:09,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:43:09,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:43:09,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:43:09,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:43:09,672 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:43:09,673 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:43:09,673 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:43:09,673 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:43:09,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:43:09,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:43:09,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:43:09,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:43:09,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:43:09,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:43:09,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:43:09,678 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:43:09,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:43:09,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:43:09,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:43:09,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:43:09,679 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_8b002e43-bb15-4dd7-b70b-978592eb700f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 083d10b9fe9751ef17a8be260d74adbbc426a982 [2021-10-13 07:43:10,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:43:10,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:43:10,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:43:10,045 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:43:10,046 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:43:10,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-properties/alternating_list-1.i [2021-10-13 07:43:10,136 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/data/7eefe7ce2/f254738af22e442e9e501ad4a5ca828f/FLAG357e4eac9 [2021-10-13 07:43:10,938 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:43:10,939 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/sv-benchmarks/c/list-properties/alternating_list-1.i [2021-10-13 07:43:10,966 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/data/7eefe7ce2/f254738af22e442e9e501ad4a5ca828f/FLAG357e4eac9 [2021-10-13 07:43:11,176 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/data/7eefe7ce2/f254738af22e442e9e501ad4a5ca828f [2021-10-13 07:43:11,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:43:11,181 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:43:11,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:43:11,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:43:11,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:43:11,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:43:11" (1/1) ... [2021-10-13 07:43:11,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@471b1358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11, skipping insertion in model container [2021-10-13 07:43:11,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:43:11" (1/1) ... [2021-10-13 07:43:11,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:43:11,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:43:11,597 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_8b002e43-bb15-4dd7-b70b-978592eb700f/sv-benchmarks/c/list-properties/alternating_list-1.i[23574,23587] [2021-10-13 07:43:11,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:43:11,611 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:43:11,659 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_8b002e43-bb15-4dd7-b70b-978592eb700f/sv-benchmarks/c/list-properties/alternating_list-1.i[23574,23587] [2021-10-13 07:43:11,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:43:11,698 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:43:11,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11 WrapperNode [2021-10-13 07:43:11,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:43:11,700 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:43:11,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:43:11,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:43:11,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (1/1) ... [2021-10-13 07:43:11,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (1/1) ... [2021-10-13 07:43:11,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:43:11,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:43:11,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:43:11,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:43:11,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (1/1) ... [2021-10-13 07:43:11,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (1/1) ... [2021-10-13 07:43:11,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (1/1) ... [2021-10-13 07:43:11,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (1/1) ... [2021-10-13 07:43:11,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (1/1) ... [2021-10-13 07:43:11,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (1/1) ... [2021-10-13 07:43:11,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (1/1) ... [2021-10-13 07:43:11,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:43:11,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:43:11,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:43:11,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:43:11,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (1/1) ... [2021-10-13 07:43:11,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:43:11,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:43:11,838 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:43:11,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:43:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:43:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:43:11,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:43:11,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:43:11,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:43:11,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:43:11,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:43:11,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:43:11,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:43:11,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:43:12,484 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:43:12,484 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-13 07:43:12,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:43:12 BoogieIcfgContainer [2021-10-13 07:43:12,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:43:12,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:43:12,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:43:12,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:43:12,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:43:11" (1/3) ... [2021-10-13 07:43:12,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1259ebf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:43:12, skipping insertion in model container [2021-10-13 07:43:12,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (2/3) ... [2021-10-13 07:43:12,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1259ebf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:43:12, skipping insertion in model container [2021-10-13 07:43:12,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:43:12" (3/3) ... [2021-10-13 07:43:12,507 INFO L111 eAbstractionObserver]: Analyzing ICFG alternating_list-1.i [2021-10-13 07:43:12,515 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:43:12,515 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:43:12,606 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:43:12,612 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 07:43:12,613 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:43:12,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 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 07:43:12,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:43:12,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:43:12,637 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:43:12,638 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:43:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:43:12,645 INFO L82 PathProgramCache]: Analyzing trace with hash 210643884, now seen corresponding path program 1 times [2021-10-13 07:43:12,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:43:12,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020544819] [2021-10-13 07:43:12,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:12,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:43:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:12,926 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 07:43:12,927 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:43:12,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020544819] [2021-10-13 07:43:12,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020544819] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:43:12,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:43:12,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:43:12,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390495672] [2021-10-13 07:43:12,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:43:12,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:43:12,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:43:12,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:43:12,972 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:12,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:43:13,001 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2021-10-13 07:43:13,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:43:13,003 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 07:43:13,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:43:13,017 INFO L225 Difference]: With dead ends: 37 [2021-10-13 07:43:13,018 INFO L226 Difference]: Without dead ends: 14 [2021-10-13 07:43:13,022 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 07:43:13,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-13 07:43:13,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-13 07:43:13,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:13,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-10-13 07:43:13,063 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2021-10-13 07:43:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:43:13,064 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-10-13 07:43:13,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:13,064 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-10-13 07:43:13,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:43:13,065 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:43:13,066 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:43:13,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:43:13,067 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:43:13,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:43:13,071 INFO L82 PathProgramCache]: Analyzing trace with hash 942306794, now seen corresponding path program 1 times [2021-10-13 07:43:13,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:43:13,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431813314] [2021-10-13 07:43:13,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:13,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:43:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:13,214 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 07:43:13,214 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:43:13,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431813314] [2021-10-13 07:43:13,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431813314] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:43:13,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:43:13,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:43:13,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208011106] [2021-10-13 07:43:13,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:43:13,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:43:13,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:43:13,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:43:13,222 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:13,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:43:13,349 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-10-13 07:43:13,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:43:13,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 07:43:13,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:43:13,352 INFO L225 Difference]: With dead ends: 36 [2021-10-13 07:43:13,352 INFO L226 Difference]: Without dead ends: 25 [2021-10-13 07:43:13,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:43:13,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-13 07:43:13,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2021-10-13 07:43:13,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:13,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-10-13 07:43:13,367 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2021-10-13 07:43:13,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:43:13,367 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-10-13 07:43:13,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:13,368 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-10-13 07:43:13,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:43:13,370 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:43:13,374 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:43:13,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:43:13,375 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:43:13,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:43:13,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1943564139, now seen corresponding path program 1 times [2021-10-13 07:43:13,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:43:13,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679049977] [2021-10-13 07:43:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:13,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:43:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:13,668 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:43:13,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679049977] [2021-10-13 07:43:13,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679049977] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:43:13,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956751294] [2021-10-13 07:43:13,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:13,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:43:13,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:43:13,672 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:43:13,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:43:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:13,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 07:43:13,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:13,962 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-10-13 07:43:13,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 31 [2021-10-13 07:43:14,865 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 15 treesize of output 1 [2021-10-13 07:43:14,928 INFO L354 Elim1Store]: treesize reduction 44, result has 45.7 percent of original size [2021-10-13 07:43:14,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 36 treesize of output 62 [2021-10-13 07:43:15,060 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:43:15,062 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 07:43:15,070 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 07:43:15,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:43:15,132 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 07:43:15,227 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:43:15,227 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 07:43:15,369 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:43:15,369 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 07:43:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:15,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:16,101 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.offset Int)) (= (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) 1)) is different from false [2021-10-13 07:43:16,130 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:43:16,131 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:43:17,125 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.offset_35 Int) (v_DerPreprocessor_2 Int)) (= (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) (+ c_ULTIMATE.start_main_~p~0.offset 4) v_DerPreprocessor_2)))) (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_35 3))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) 1)) is different from false [2021-10-13 07:43:17,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-13 07:43:17,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556782107] [2021-10-13 07:43:17,203 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-10-13 07:43:17,204 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:43:17,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:43:17,217 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:43:17,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:43:17,255 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:43:17,256 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:43:17,257 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:43:17,258 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:43:17,259 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:43:17,260 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:43:17,261 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:43:17,263 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-13 07:43:17,272 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@7f64d59a at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:571) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.doElimAllRec(ElimStorePlain.java:444) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:242) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:402) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:228) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) 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 07:43:17,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:43:17,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-13 07:43:17,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367312131] [2021-10-13 07:43:17,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:43:17,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:43:17,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:43:17,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=148, Unknown=2, NotChecked=50, Total=240 [2021-10-13 07:43:17,279 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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 07:43:17,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:43:17,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:17,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:43:17,497 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@7f64d59a at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:864) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) 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 07:43:17,500 INFO L168 Benchmark]: Toolchain (without parser) took 6318.05 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 66.8 MB in the beginning and 52.1 MB in the end (delta: 14.8 MB). Peak memory consumption was 43.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:17,500 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 98.6 MB. Free memory is still 52.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:43:17,501 INFO L168 Benchmark]: CACSL2BoogieTranslator took 516.15 ms. Allocated memory is still 98.6 MB. Free memory was 66.6 MB in the beginning and 67.3 MB in the end (delta: -686.5 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:17,501 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.53 ms. Allocated memory is still 98.6 MB. Free memory was 67.3 MB in the beginning and 65.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:17,502 INFO L168 Benchmark]: Boogie Preprocessor took 37.00 ms. Allocated memory is still 98.6 MB. Free memory was 65.3 MB in the beginning and 63.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:17,503 INFO L168 Benchmark]: RCFGBuilder took 694.10 ms. Allocated memory is still 98.6 MB. Free memory was 63.8 MB in the beginning and 49.5 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:17,503 INFO L168 Benchmark]: TraceAbstraction took 5007.62 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 49.2 MB in the beginning and 52.1 MB in the end (delta: -2.9 MB). Peak memory consumption was 27.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:17,507 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 98.6 MB. Free memory is still 52.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 516.15 ms. Allocated memory is still 98.6 MB. Free memory was 66.6 MB in the beginning and 67.3 MB in the end (delta: -686.5 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.53 ms. Allocated memory is still 98.6 MB. Free memory was 67.3 MB in the beginning and 65.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.00 ms. Allocated memory is still 98.6 MB. Free memory was 65.3 MB in the beginning and 63.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 694.10 ms. Allocated memory is still 98.6 MB. Free memory was 63.8 MB in the beginning and 49.5 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5007.62 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 49.2 MB in the beginning and 52.1 MB in the end (delta: -2.9 MB). Peak memory consumption was 27.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@7f64d59a de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@7f64d59a: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:43:17,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/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 07:43:20,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:43:20,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:43:20,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:43:20,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:43:20,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:43:20,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:43:20,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:43:20,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:43:20,654 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:43:20,655 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:43:20,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:43:20,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:43:20,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:43:20,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:43:20,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:43:20,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:43:20,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:43:20,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:43:20,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:43:20,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:43:20,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:43:20,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:43:20,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:43:20,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:43:20,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:43:20,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:43:20,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:43:20,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:43:20,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:43:20,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:43:20,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:43:20,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:43:20,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:43:20,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:43:20,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:43:20,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:43:20,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:43:20,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:43:20,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:43:20,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:43:20,730 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:43:20,794 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:43:20,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:43:20,796 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:43:20,797 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:43:20,797 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:43:20,797 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:43:20,798 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:43:20,798 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:43:20,798 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:43:20,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:43:20,802 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:43:20,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:43:20,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:43:20,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:43:20,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:43:20,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:43:20,804 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:43:20,804 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:43:20,805 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:43:20,805 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:43:20,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:43:20,805 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:43:20,806 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:43:20,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:43:20,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:43:20,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:43:20,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:43:20,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:43:20,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:43:20,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:43:20,808 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:43:20,809 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:43:20,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:43:20,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:43:20,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:43:20,810 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_8b002e43-bb15-4dd7-b70b-978592eb700f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 083d10b9fe9751ef17a8be260d74adbbc426a982 [2021-10-13 07:43:21,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:43:21,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:43:21,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:43:21,303 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:43:21,304 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:43:21,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-properties/alternating_list-1.i [2021-10-13 07:43:21,393 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/data/cff2d8aed/98552ae97a144852a0fe03b73e28c59b/FLAG2142db13c [2021-10-13 07:43:22,231 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:43:22,233 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/sv-benchmarks/c/list-properties/alternating_list-1.i [2021-10-13 07:43:22,259 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/data/cff2d8aed/98552ae97a144852a0fe03b73e28c59b/FLAG2142db13c [2021-10-13 07:43:22,463 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/data/cff2d8aed/98552ae97a144852a0fe03b73e28c59b [2021-10-13 07:43:22,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:43:22,468 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:43:22,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:43:22,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:43:22,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:43:22,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:43:22" (1/1) ... [2021-10-13 07:43:22,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bdd8bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:22, skipping insertion in model container [2021-10-13 07:43:22,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:43:22" (1/1) ... [2021-10-13 07:43:22,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:43:22,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:43:22,978 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_8b002e43-bb15-4dd7-b70b-978592eb700f/sv-benchmarks/c/list-properties/alternating_list-1.i[23574,23587] [2021-10-13 07:43:22,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:43:23,008 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:43:23,075 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_8b002e43-bb15-4dd7-b70b-978592eb700f/sv-benchmarks/c/list-properties/alternating_list-1.i[23574,23587] [2021-10-13 07:43:23,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:43:23,118 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:43:23,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:23 WrapperNode [2021-10-13 07:43:23,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:43:23,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:43:23,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:43:23,121 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:43:23,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:23" (1/1) ... [2021-10-13 07:43:23,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:23" (1/1) ... [2021-10-13 07:43:23,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:43:23,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:43:23,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:43:23,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:43:23,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:23" (1/1) ... [2021-10-13 07:43:23,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:23" (1/1) ... [2021-10-13 07:43:23,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:23" (1/1) ... [2021-10-13 07:43:23,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:23" (1/1) ... [2021-10-13 07:43:23,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:23" (1/1) ... [2021-10-13 07:43:23,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:23" (1/1) ... [2021-10-13 07:43:23,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:23" (1/1) ... [2021-10-13 07:43:23,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:43:23,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:43:23,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:43:23,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:43:23,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:23" (1/1) ... [2021-10-13 07:43:23,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:43:23,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:43:23,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:43:23,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:43:23,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:43:23,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:43:23,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:43:23,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:43:23,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:43:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:43:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:43:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:43:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:43:23,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:43:23,880 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:43:23,881 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-13 07:43:23,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:43:23 BoogieIcfgContainer [2021-10-13 07:43:23,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:43:23,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:43:23,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:43:23,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:43:23,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:43:22" (1/3) ... [2021-10-13 07:43:23,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3208a61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:43:23, skipping insertion in model container [2021-10-13 07:43:23,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:23" (2/3) ... [2021-10-13 07:43:23,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3208a61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:43:23, skipping insertion in model container [2021-10-13 07:43:23,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:43:23" (3/3) ... [2021-10-13 07:43:23,907 INFO L111 eAbstractionObserver]: Analyzing ICFG alternating_list-1.i [2021-10-13 07:43:23,914 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:43:23,915 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:43:23,977 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:43:23,988 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 07:43:23,988 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:43:24,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.52) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:24,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:43:24,035 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:43:24,036 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:43:24,037 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:43:24,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:43:24,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1741316627, now seen corresponding path program 1 times [2021-10-13 07:43:24,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:43:24,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589246646] [2021-10-13 07:43:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:24,066 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:43:24,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:43:24,070 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:43:24,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:43:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:24,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:43:24,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:24,439 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 07:43:24,511 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 07:43:24,542 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 07:43:24,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:24,606 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 07:43:24,645 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 07:43:24,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:43:24,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589246646] [2021-10-13 07:43:24,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589246646] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:43:24,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:43:24,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-13 07:43:24,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872359217] [2021-10-13 07:43:24,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:43:24,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:43:24,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:43:24,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:43:24,684 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.52) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:25,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:43:25,023 INFO L93 Difference]: Finished difference Result 74 states and 104 transitions. [2021-10-13 07:43:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:43:25,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 07:43:25,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:43:25,037 INFO L225 Difference]: With dead ends: 74 [2021-10-13 07:43:25,037 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 07:43:25,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:43:25,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 07:43:25,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2021-10-13 07:43:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-13 07:43:25,092 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2021-10-13 07:43:25,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:43:25,093 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-13 07:43:25,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:25,094 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-13 07:43:25,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:43:25,095 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:43:25,096 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:43:25,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:25,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:43:25,311 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:43:25,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:43:25,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1396320316, now seen corresponding path program 1 times [2021-10-13 07:43:25,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:43:25,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795516483] [2021-10-13 07:43:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:25,326 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:43:25,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:43:25,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:43:25,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:43:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:25,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 07:43:25,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:25,605 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 07:43:25,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:43:25,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 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 07:43:26,014 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-10-13 07:43:26,014 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 19 treesize of output 22 [2021-10-13 07:43:26,377 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:43:26,378 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 07:43:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:26,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:26,666 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:43:26,669 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-13 07:43:28,711 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_1 (_ 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_1)))) (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 (= (_ bv3 32) .cse0) (= .cse0 (_ bv1 32))))) is different from false [2021-10-13 07:43:30,857 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_1 (_ 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_1)))) (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 (= (_ bv3 32) .cse0) (= .cse0 (_ bv1 32))))) is different from false [2021-10-13 07:43:30,888 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 465 treesize of output 449 [2021-10-13 07:43:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:33,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:43:33,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795516483] [2021-10-13 07:43:33,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795516483] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:33,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [314934635] [2021-10-13 07:43:33,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:33,885 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:43:33,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:43:33,888 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:43:33,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-10-13 07:43:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:34,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:43:34,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:34,157 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 07:43:34,429 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 07:43:34,561 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:43:34,562 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 07:43:34,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:43:34,713 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 07:43:34,859 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:43:34,859 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 07:43:35,070 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:43:35,071 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 07:43:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:35,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:37,129 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) (_ bv1 32))) is different from false [2021-10-13 07:43:37,155 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:43:37,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:43:47,590 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~t~0.base_10 (_ BitVec 32))) (or (forall ((v_DerPreprocessor_2 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_31 (_ 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_2)))) (store .cse0 v_ULTIMATE.start_main_~t~0.base_10 (store (select .cse0 v_ULTIMATE.start_main_~t~0.base_10) v_ULTIMATE.start_main_~p~0.offset_31 (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_10)))))) is different from false [2021-10-13 07:43:47,620 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 221 treesize of output 213 [2021-10-13 07:43:50,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-10-13 07:43:50,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [314934635] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:50,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914617999] [2021-10-13 07:43:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:50,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:43:50,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:43:50,110 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:43:50,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 07:43:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:50,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:43:50,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:50,275 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 07:43:50,470 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 07:43:50,644 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:43:50,645 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 14 treesize of output 14 [2021-10-13 07:43:50,851 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 07:43:50,851 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 07:43:51,016 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:43:51,017 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 07:43:51,231 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:43:51,231 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 07:43:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:51,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:51,311 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:43:51,313 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:44:19,987 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 07:44:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-10-13 07:44:22,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914617999] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:44:22,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:44:22,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9, 9, 9, 9] total 35 [2021-10-13 07:44:22,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210042980] [2021-10-13 07:44:22,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 07:44:22,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:44:22,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 07:44:22,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=762, Unknown=12, NotChecked=244, Total=1190 [2021-10-13 07:44:22,460 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:24,735 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))) (= (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_DerPreprocessor_1 (_ 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_1)))) (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 (= (_ bv3 32) .cse0) (= .cse0 (_ bv1 32))))) (forall ((v_ULTIMATE.start_main_~t~0.base_10 (_ BitVec 32))) (or (forall ((v_DerPreprocessor_2 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_31 (_ BitVec 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_2)))) (store .cse2 v_ULTIMATE.start_main_~t~0.base_10 (store (select .cse2 v_ULTIMATE.start_main_~t~0.base_10) v_ULTIMATE.start_main_~p~0.offset_31 (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_10)))))) (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base)) is different from false [2021-10-13 07:44:26,858 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) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base) (forall ((v_DerPreprocessor_1 (_ 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_1)))) (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 (= (_ bv3 32) .cse0) (= .cse0 (_ bv1 32)))))) is different from false [2021-10-13 07:44:33,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:44:33,478 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2021-10-13 07:44:33,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 07:44:33,480 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 07:44:33,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:44:33,484 INFO L225 Difference]: With dead ends: 106 [2021-10-13 07:44:33,484 INFO L226 Difference]: Without dead ends: 104 [2021-10-13 07:44:33,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 6 IntricatePredicates, 1 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 59321.9ms TimeCoverageRelationStatistics Valid=362, Invalid=1539, Unknown=15, NotChecked=534, Total=2450 [2021-10-13 07:44:33,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-13 07:44:33,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 34. [2021-10-13 07:44:33,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 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 07:44:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-10-13 07:44:33,517 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 16 [2021-10-13 07:44:33,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:44:33,518 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-10-13 07:44:33,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:33,518 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-10-13 07:44:33,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:44:33,519 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:44:33,520 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:44:33,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:33,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:33,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:34,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:44:34,136 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:44:34,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:44:34,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1396313372, now seen corresponding path program 1 times [2021-10-13 07:44:34,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:44:34,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227448710] [2021-10-13 07:44:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:34,138 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:44:34,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:44:34,141 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:44:34,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:44:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:34,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:44:34,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:34,381 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 07:44:34,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:34,441 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 07:44:34,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:44:34,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227448710] [2021-10-13 07:44:34,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227448710] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:44:34,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:44:34,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:44:34,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745802] [2021-10-13 07:44:34,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:44:34,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:44:34,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:44:34,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:44:34,444 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 07:44:34,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:44:34,474 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2021-10-13 07:44:34,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:44:34,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 07:44:34,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:44:34,476 INFO L225 Difference]: With dead ends: 65 [2021-10-13 07:44:34,477 INFO L226 Difference]: Without dead ends: 51 [2021-10-13 07:44:34,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:44:34,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-13 07:44:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2021-10-13 07:44:34,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 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 07:44:34,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-10-13 07:44:34,486 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 16 [2021-10-13 07:44:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:44:34,487 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-10-13 07:44:34,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 07:44:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-10-13 07:44:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 07:44:34,489 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:44:34,489 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:44:34,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:34,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:44:34,705 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:44:34,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:44:34,706 INFO L82 PathProgramCache]: Analyzing trace with hash 14579615, now seen corresponding path program 1 times [2021-10-13 07:44:34,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:44:34,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24051194] [2021-10-13 07:44:34,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:34,707 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:44:34,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:44:34,709 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:44:34,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:44:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:34,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:44:34,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:44:34,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:44:35,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:44:35,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24051194] [2021-10-13 07:44:35,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24051194] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:44:35,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:44:35,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:44:35,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245259395] [2021-10-13 07:44:35,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:44:35,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:44:35,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:44:35,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:44:35,007 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:44:35,049 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2021-10-13 07:44:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:44:35,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 07:44:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:44:35,051 INFO L225 Difference]: With dead ends: 79 [2021-10-13 07:44:35,051 INFO L226 Difference]: Without dead ends: 47 [2021-10-13 07:44:35,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:44:35,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-13 07:44:35,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-10-13 07:44:35,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 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 07:44:35,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-10-13 07:44:35,060 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 21 [2021-10-13 07:44:35,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:44:35,061 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-10-13 07:44:35,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:35,061 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-10-13 07:44:35,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 07:44:35,063 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:44:35,063 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:44:35,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:35,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:44:35,276 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:44:35,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:44:35,277 INFO L82 PathProgramCache]: Analyzing trace with hash 14586559, now seen corresponding path program 1 times [2021-10-13 07:44:35,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:44:35,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084302351] [2021-10-13 07:44:35,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:35,278 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:44:35,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:44:35,280 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:44:35,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:44:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:35,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:44:35,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:35,499 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 07:44:35,641 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:44:35,642 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 07:44:35,733 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 07:44:35,889 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-10-13 07:44:35,890 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 130 treesize of output 84 [2021-10-13 07:44:35,896 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 85 treesize of output 75 [2021-10-13 07:44:35,925 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-10-13 07:44:35,926 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 75 treesize of output 59 [2021-10-13 07:44:36,072 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 48 treesize of output 30 [2021-10-13 07:44:36,078 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 27 treesize of output 15 [2021-10-13 07:44:36,130 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 07:44:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:44:36,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:36,315 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 07:44:36,320 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:36,321 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 07:44:36,324 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:36,324 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:44:36,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:36,505 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 58 treesize of output 43 [2021-10-13 07:44:36,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:44:36,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:44:36,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:44:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:44:37,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:44:37,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084302351] [2021-10-13 07:44:37,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084302351] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:44:37,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1959109919] [2021-10-13 07:44:37,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:37,402 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:44:37,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:44:37,417 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:44:37,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-13 07:44:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:37,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 07:44:37,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:37,731 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 07:44:37,997 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:44:37,997 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 07:44:38,139 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 07:44:38,161 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 07:44:38,371 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 07:44:38,372 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 07:44:38,383 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 07:44:38,422 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 07:44:38,423 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 07:44:38,675 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 33 [2021-10-13 07:44:38,680 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 30 treesize of output 18 [2021-10-13 07:44:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:44:38,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:38,935 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 07:44:38,941 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:38,942 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 07:44:38,946 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:38,948 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:44:39,119 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 07:44:39,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:44:39,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:44:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:44:40,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1959109919] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:44:40,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660845681] [2021-10-13 07:44:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:40,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:44:40,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:44:40,261 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:44:40,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 07:44:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:40,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 07:44:40,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:40,524 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 07:44:40,684 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:44:40,685 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 07:44:40,856 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 07:44:40,868 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 07:44:41,097 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 07:44:41,097 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 07:44:41,103 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 07:44:41,134 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 07:44:41,135 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 07:44:41,361 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 07:44:41,367 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 07:44:41,386 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 07:44:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:44:41,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:41,491 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 07:44:41,500 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:41,501 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 07:44:41,505 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:41,507 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:44:41,667 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 07:44:41,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:44:41,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:44:41,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:44:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:44:44,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660845681] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:44:44,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:44:44,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 25 [2021-10-13 07:44:44,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713877892] [2021-10-13 07:44:44,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 07:44:44,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:44:44,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 07:44:44,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-10-13 07:44:44,055 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 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 07:44:44,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:44:44,980 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-10-13 07:44:44,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:44:44,981 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 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 21 [2021-10-13 07:44:44,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:44:44,982 INFO L225 Difference]: With dead ends: 70 [2021-10-13 07:44:44,983 INFO L226 Difference]: Without dead ends: 50 [2021-10-13 07:44:44,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 87 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 4960.0ms TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-10-13 07:44:44,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-13 07:44:44,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2021-10-13 07:44:44,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 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 07:44:44,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-10-13 07:44:44,992 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 21 [2021-10-13 07:44:44,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:44:44,993 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-10-13 07:44:44,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 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 07:44:44,993 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-10-13 07:44:44,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 07:44:44,995 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:44:44,995 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:44:45,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:45,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-10-13 07:44:45,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:45,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:44:45,613 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:44:45,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:44:45,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1022420242, now seen corresponding path program 1 times [2021-10-13 07:44:45,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:44:45,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830790767] [2021-10-13 07:44:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:45,614 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:44:45,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:44:45,615 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:44:45,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 07:44:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:45,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 07:44:45,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:45,997 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 07:44:46,192 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:44:46,193 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 27 treesize of output 34 [2021-10-13 07:44:46,324 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 07:44:46,456 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 07:44:46,503 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-10-13 07:44:46,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 07:44:46,540 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-13 07:44:46,540 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 52 treesize of output 28 [2021-10-13 07:44:46,692 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-13 07:44:46,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 39 [2021-10-13 07:44:46,914 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-10-13 07:44:46,914 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 07:44:46,962 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-10-13 07:44:46,962 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 07:44:46,986 INFO L354 Elim1Store]: treesize reduction 75, result has 20.2 percent of original size [2021-10-13 07:44:46,987 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 07:44:47,315 INFO L354 Elim1Store]: treesize reduction 112, result has 15.8 percent of original size [2021-10-13 07:44:47,315 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 07:44:47,391 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-10-13 07:44:47,391 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 07:44:47,427 INFO L354 Elim1Store]: treesize reduction 105, result has 12.5 percent of original size [2021-10-13 07:44:47,428 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 07:44:48,072 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-10-13 07:44:48,072 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 119 treesize of output 70 [2021-10-13 07:44:48,080 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:44:48,081 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 64 treesize of output 41 [2021-10-13 07:44:48,304 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-13 07:44:48,304 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 07:44:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:44:48,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:48,692 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:48,694 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-10-13 07:44:48,699 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:48,704 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-10-13 07:44:49,002 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:49,004 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 140 [2021-10-13 07:44:53,012 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~t~0.base_25 (_ BitVec 32)) (v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (let ((.cse2 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse0 (let ((.cse5 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) .cse2 v_DerPreprocessor_12)))) (store .cse5 v_ULTIMATE.start_main_~t~0.base_25 (store (select .cse5 v_ULTIMATE.start_main_~t~0.base_25) (_ bv0 32) (_ bv3 32)))))) (or (not (= (_ bv1 32) (select (select .cse0 c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_25))))) (= (_ bv2 32) (let ((.cse3 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset))) (select (select .cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) .cse2 v_ULTIMATE.start_main_~t~0.base_25)))) (store .cse1 v_ULTIMATE.start_main_~t~0.base_25 (store (select .cse1 v_ULTIMATE.start_main_~t~0.base_25) (_ bv0 32) v_DerPreprocessor_10))) c_ULTIMATE.start_main_~a~0.base) .cse3)) (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) .cse2 (_ bv0 32))))) (store .cse4 v_ULTIMATE.start_main_~t~0.base_25 (store (select .cse4 v_ULTIMATE.start_main_~t~0.base_25) (_ bv0 32) v_DerPreprocessor_11))) c_ULTIMATE.start_main_~a~0.base) .cse3)))))))) is different from false [2021-10-13 07:44:53,067 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:53,069 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 182 [2021-10-13 07:44:53,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:53,254 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 4037 treesize of output 3802 [2021-10-13 07:44:53,279 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:53,285 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2753 [2021-10-13 07:45:34,619 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 26082 treesize of output 25794 [2021-10-13 07:45:35,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:35,775 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 30481 treesize of output 22222 [2021-10-13 07:45:36,473 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:45:36,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830790767] [2021-10-13 07:45:36,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:45:36,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [614999536] [2021-10-13 07:45:36,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:45:36,475 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:45:36,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:45:36,476 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:45:36,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-13 07:45:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:45:37,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 07:45:37,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:37,043 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 07:45:37,216 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:45:37,216 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 28 treesize of output 35 [2021-10-13 07:45:37,480 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 07:45:37,496 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 07:45:37,729 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 07:45:37,774 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-13 07:45:37,774 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 51 treesize of output 27 [2021-10-13 07:45:37,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:45:37,796 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 07:45:38,038 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-10-13 07:45:38,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 42 [2021-10-13 07:45:38,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:45:38,481 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-13 07:45:38,482 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 152 treesize of output 88 [2021-10-13 07:45:38,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:45:38,524 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-13 07:45:38,524 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 149 treesize of output 142 [2021-10-13 07:45:38,531 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 07:45:39,110 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 07:45:39,111 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 07:45:39,147 INFO L354 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2021-10-13 07:45:39,148 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 07:45:39,194 INFO L354 Elim1Store]: treesize reduction 128, result has 12.9 percent of original size [2021-10-13 07:45:39,194 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 07:45:40,567 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:45:40,567 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 74 treesize of output 53 [2021-10-13 07:45:40,573 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:45:40,574 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 47 treesize of output 31 [2021-10-13 07:45:41,185 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-10-13 07:45:41,185 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 29 treesize of output 25 [2021-10-13 07:45:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:41,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:41,316 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:41,317 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-10-13 07:45:41,323 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:41,324 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-10-13 07:45:41,572 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:41,574 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 140 [2021-10-13 07:45:45,097 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~t~0.base_26 (_ BitVec 32)) (v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (let ((.cse2 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse0 (let ((.cse5 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) .cse2 v_DerPreprocessor_12)))) (store .cse5 v_ULTIMATE.start_main_~t~0.base_26 (store (select .cse5 v_ULTIMATE.start_main_~t~0.base_26) (_ bv0 32) (_ bv3 32)))))) (or (not (= (_ bv1 32) (select (select .cse0 c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (= (let ((.cse3 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset))) (select (select .cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) .cse2 v_ULTIMATE.start_main_~t~0.base_26)))) (store .cse1 v_ULTIMATE.start_main_~t~0.base_26 (store (select .cse1 v_ULTIMATE.start_main_~t~0.base_26) (_ bv0 32) v_DerPreprocessor_10))) c_ULTIMATE.start_main_~a~0.base) .cse3)) (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) .cse2 (_ bv0 32))))) (store .cse4 v_ULTIMATE.start_main_~t~0.base_26 (store (select .cse4 v_ULTIMATE.start_main_~t~0.base_26) (_ bv0 32) v_DerPreprocessor_11))) c_ULTIMATE.start_main_~a~0.base) .cse3))) (_ bv2 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_26)))))))) is different from false [2021-10-13 07:45:45,141 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:45,142 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-10-13 07:45:45,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:45,258 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 2118 treesize of output 2043 [2021-10-13 07:45:45,273 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:45,281 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2137 [2021-10-13 07:46:01,959 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 125178 treesize of output 123462 [2021-10-13 07:46:09,827 WARN L207 SmtUtils]: Spent 7.86 s on a formula simplification. DAG size of input: 862 DAG size of output: 860 [2021-10-13 07:46:09,909 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 140302 treesize of output 139738 [2021-10-13 07:46:14,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:46:14,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215074182] [2021-10-13 07:46:14,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:46:14,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:46:14,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:46:14,275 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:46:14,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 07:46:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:46:14,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 07:46:14,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:46:14,771 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 07:46:14,933 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:46:14,933 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 26 treesize of output 33 [2021-10-13 07:46:15,136 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 07:46:15,163 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 13 treesize of output 9 [2021-10-13 07:46:15,267 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-13 07:46:15,268 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 50 treesize of output 26 [2021-10-13 07:46:15,287 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 07:46:15,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 07:46:15,492 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-10-13 07:46:15,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 43 [2021-10-13 07:46:15,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:46:15,662 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-13 07:46:15,662 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 152 treesize of output 88 [2021-10-13 07:46:15,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:46:15,691 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-13 07:46:15,691 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 149 treesize of output 142 [2021-10-13 07:46:15,696 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 07:46:15,944 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 07:46:15,944 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 07:46:15,987 INFO L354 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2021-10-13 07:46:15,988 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 07:46:16,049 INFO L354 Elim1Store]: treesize reduction 128, result has 12.9 percent of original size [2021-10-13 07:46:16,050 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 07:46:18,396 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:46:18,396 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 74 treesize of output 53 [2021-10-13 07:46:18,402 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:46:18,403 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 47 treesize of output 31 [2021-10-13 07:46:18,771 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-10-13 07:46:18,771 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 29 treesize of output 25 [2021-10-13 07:46:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:46:18,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:46:18,884 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:46:18,885 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-10-13 07:46:18,888 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:46:18,889 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-10-13 07:46:19,071 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:46:19,072 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 140 [2021-10-13 07:46:24,272 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_27 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (let ((.cse2 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse0 (let ((.cse5 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) .cse2 v_DerPreprocessor_12)))) (store .cse5 v_ULTIMATE.start_main_~t~0.base_27 (store (select .cse5 v_ULTIMATE.start_main_~t~0.base_27) (_ bv0 32) (_ bv3 32)))))) (or (not (= (select (select .cse0 c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_27)))) (= (_ bv2 32) (let ((.cse3 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset))) (select (select .cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) .cse2 v_ULTIMATE.start_main_~t~0.base_27)))) (store .cse1 v_ULTIMATE.start_main_~t~0.base_27 (store (select .cse1 v_ULTIMATE.start_main_~t~0.base_27) (_ bv0 32) v_DerPreprocessor_10))) c_ULTIMATE.start_main_~a~0.base) .cse3)) (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) .cse2 (_ bv0 32))))) (store .cse4 v_ULTIMATE.start_main_~t~0.base_27 (store (select .cse4 v_ULTIMATE.start_main_~t~0.base_27) (_ bv0 32) v_DerPreprocessor_11))) c_ULTIMATE.start_main_~a~0.base) .cse3)))))))) is different from false [2021-10-13 07:46:24,316 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:46:24,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-10-13 07:46:24,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:46:24,528 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 2044 treesize of output 1965 [2021-10-13 07:46:24,541 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:46:24,545 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1349 [2021-10-13 07:46:45,819 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 7952 treesize of output 7844 [2021-10-13 07:46:46,185 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 127250 treesize of output 125654 [2021-10-13 07:46:51,782 WARN L207 SmtUtils]: Spent 5.59 s on a formula simplification. DAG size of input: 1540 DAG size of output: 1540 [2021-10-13 07:46:51,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:46:51,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:46:51,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 07:46:51,790 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 07:46:51,790 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 07:46:51,796 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:46:51,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:46:52,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:46:52,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:46:52,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:46:52,405 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:46:52,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:46:52 BoogieIcfgContainer [2021-10-13 07:46:52,423 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:46:52,424 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:46:52,424 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:46:52,425 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:46:52,425 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:43:23" (3/4) ... [2021-10-13 07:46:52,429 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:46:52,430 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:46:52,431 INFO L168 Benchmark]: Toolchain (without parser) took 209962.63 ms. Allocated memory was 50.3 MB in the beginning and 482.3 MB in the end (delta: 432.0 MB). Free memory was 26.3 MB in the beginning and 412.7 MB in the end (delta: -386.4 MB). Peak memory consumption was 44.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:46:52,431 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 50.3 MB. Free memory was 31.2 MB in the beginning and 31.2 MB in the end (delta: 33.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:46:52,432 INFO L168 Benchmark]: CACSL2BoogieTranslator took 648.14 ms. Allocated memory was 50.3 MB in the beginning and 69.2 MB in the end (delta: 18.9 MB). Free memory was 26.1 MB in the beginning and 45.8 MB in the end (delta: -19.8 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:46:52,432 INFO L168 Benchmark]: Boogie Procedure Inliner took 89.00 ms. Allocated memory is still 69.2 MB. Free memory was 45.6 MB in the beginning and 43.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:46:52,433 INFO L168 Benchmark]: Boogie Preprocessor took 71.09 ms. Allocated memory is still 69.2 MB. Free memory was 43.7 MB in the beginning and 42.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:46:52,433 INFO L168 Benchmark]: RCFGBuilder took 601.42 ms. Allocated memory is still 69.2 MB. Free memory was 42.0 MB in the beginning and 45.1 MB in the end (delta: -3.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:46:52,434 INFO L168 Benchmark]: TraceAbstraction took 208538.36 ms. Allocated memory was 69.2 MB in the beginning and 482.3 MB in the end (delta: 413.1 MB). Free memory was 44.5 MB in the beginning and 412.7 MB in the end (delta: -368.2 MB). Peak memory consumption was 294.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:46:52,434 INFO L168 Benchmark]: Witness Printer took 5.55 ms. Allocated memory is still 482.3 MB. Free memory is still 412.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:46:52,436 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 50.3 MB. Free memory was 31.2 MB in the beginning and 31.2 MB in the end (delta: 33.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 648.14 ms. Allocated memory was 50.3 MB in the beginning and 69.2 MB in the end (delta: 18.9 MB). Free memory was 26.1 MB in the beginning and 45.8 MB in the end (delta: -19.8 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 89.00 ms. Allocated memory is still 69.2 MB. Free memory was 45.6 MB in the beginning and 43.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 71.09 ms. Allocated memory is still 69.2 MB. Free memory was 43.7 MB in the beginning and 42.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 601.42 ms. Allocated memory is still 69.2 MB. Free memory was 42.0 MB in the beginning and 45.1 MB in the end (delta: -3.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 208538.36 ms. Allocated memory was 69.2 MB in the beginning and 482.3 MB in the end (delta: 413.1 MB). Free memory was 44.5 MB in the beginning and 412.7 MB in the end (delta: -368.2 MB). Peak memory consumption was 294.4 MB. Max. memory is 16.1 GB. * Witness Printer took 5.55 ms. Allocated memory is still 482.3 MB. Free memory is still 412.7 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: 573]: 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: [L532] int flag = 1; [L533] List a = (List) malloc(sizeof(struct node)); [L534] COND FALSE !(a == 0) [L535] List t; [L536] List p = a; [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND TRUE \read(flag) [L539] p->h = 1 [L540] flag = 0 [L545] t = (List) malloc(sizeof(struct node)) [L546] COND FALSE !(t == 0) [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND FALSE !(\read(flag)) [L542] p->h = 2 [L543] flag = 1 [L545] t = (List) malloc(sizeof(struct node)) [L546] COND FALSE !(t == 0) [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] flag = 1 [L553] EXPR p->h [L553] COND TRUE p->h != 3 [L554] COND TRUE \read(flag) [L555] flag = 0 [L556] EXPR p->h [L556] COND FALSE !(p->h != 1) [L563] EXPR p->n [L563] p = p->n [L553] EXPR p->h [L553] COND TRUE p->h != 3 [L554] COND FALSE !(\read(flag)) [L559] flag = 1 [L560] EXPR p->h [L560] COND TRUE p->h != 2 [L573] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 208430.2ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 35.8ms, AutomataDifference: 12423.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 105 SDtfs, 356 SDslu, 466 SDs, 0 SdLazy, 654 SolverSat, 119 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2459.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 323 GetRequests, 225 SyntacticMatches, 14 SemanticMatches, 84 ConstructedPredicates, 6 IntricatePredicates, 1 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 64381.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=3, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 83.0ms AutomataMinimizationTime, 5 MinimizatonAttempts, 97 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 129.7ms SsaConstructionTime, 393.4ms SatisfiabilityAnalysisTime, 65300.9ms InterpolantComputationTime, 159 NumberOfCodeBlocks, 159 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 300 ConstructedInterpolants, 41 QuantifiedInterpolants, 3533 SizeOfPredicates, 67 NumberOfNonLiveVariables, 554 ConjunctsInSsa, 109 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 18/42 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 07:46:52,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b002e43-bb15-4dd7-b70b-978592eb700f/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...