./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0219.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/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_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0219.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d0a821c00018fd0a7d1057c117e3e5b172a3096a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/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_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0219.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d0a821c00018fd0a7d1057c117e3e5b172a3096a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:35:34,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:35:34,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:35:34,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:35:34,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:35:34,626 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:35:34,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:35:34,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:35:34,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:35:34,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:35:34,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:35:34,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:35:34,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:35:34,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:35:34,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:35:34,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:35:34,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:35:34,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:35:34,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:35:34,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:35:34,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:35:34,666 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:35:34,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:35:34,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:35:34,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:35:34,677 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:35:34,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:35:34,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:35:34,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:35:34,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:35:34,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:35:34,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:35:34,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:35:34,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:35:34,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:35:34,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:35:34,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:35:34,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:35:34,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:35:34,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:35:34,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:35:34,699 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 07:35:34,746 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:35:34,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:35:34,748 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:35:34,749 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:35:34,749 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:35:34,749 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:35:34,749 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:35:34,750 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:35:34,750 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:35:34,750 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:35:34,751 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:35:34,751 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:35:34,752 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:35:34,752 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:35:34,752 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:35:34,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:35:34,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:35:34,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:35:34,754 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:35:34,755 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:35:34,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:35:34,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:35:34,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:35:34,756 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:35:34,756 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:35:34,756 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:35:34,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:35:34,758 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:35:34,758 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:35:34,758 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:35:34,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:35:34,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:35:34,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:35:34,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:35:34,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:35:34,760 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:35:34,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:35:34,760 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:35:34,761 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:35:34,761 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_6317390c-5f75-4be8-ba2b-5352ea9a7dea/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0a821c00018fd0a7d1057c117e3e5b172a3096a [2021-10-13 07:35:35,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:35:35,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:35:35,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:35:35,075 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:35:35,075 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:35:35,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety/test-0219.i [2021-10-13 07:35:35,146 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/data/9cc1b7a8d/037006e6046c4a4dbeb8e03312de4767/FLAGa1c75c2e0 [2021-10-13 07:35:35,712 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:35:35,713 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/sv-benchmarks/c/memsafety/test-0219.i [2021-10-13 07:35:35,744 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/data/9cc1b7a8d/037006e6046c4a4dbeb8e03312de4767/FLAGa1c75c2e0 [2021-10-13 07:35:36,013 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/data/9cc1b7a8d/037006e6046c4a4dbeb8e03312de4767 [2021-10-13 07:35:36,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:35:36,016 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:35:36,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:35:36,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:35:36,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:35:36,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:35:36" (1/1) ... [2021-10-13 07:35:36,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ea27400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:36, skipping insertion in model container [2021-10-13 07:35:36,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:35:36" (1/1) ... [2021-10-13 07:35:36,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:35:36,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:35:36,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:35:36,466 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:35:36,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:35:36,548 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:35:36,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:36 WrapperNode [2021-10-13 07:35:36,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:35:36,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:35:36,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:35:36,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:35:36,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:36" (1/1) ... [2021-10-13 07:35:36,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:36" (1/1) ... [2021-10-13 07:35:36,605 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:35:36,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:35:36,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:35:36,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:35:36,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:36" (1/1) ... [2021-10-13 07:35:36,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:36" (1/1) ... [2021-10-13 07:35:36,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:36" (1/1) ... [2021-10-13 07:35:36,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:36" (1/1) ... [2021-10-13 07:35:36,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:36" (1/1) ... [2021-10-13 07:35:36,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:36" (1/1) ... [2021-10-13 07:35:36,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:36" (1/1) ... [2021-10-13 07:35:36,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:35:36,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:35:36,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:35:36,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:35:36,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:36" (1/1) ... [2021-10-13 07:35:36,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:35:36,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:35:36,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:35:36,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:35:36,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:35:36,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:35:36,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:35:36,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:35:36,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:35:36,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-13 07:35:36,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:35:36,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:35:36,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:35:37,580 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:35:37,581 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-13 07:35:37,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:35:37 BoogieIcfgContainer [2021-10-13 07:35:37,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:35:37,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:35:37,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:35:37,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:35:37,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:35:36" (1/3) ... [2021-10-13 07:35:37,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@476809a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:35:37, skipping insertion in model container [2021-10-13 07:35:37,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:36" (2/3) ... [2021-10-13 07:35:37,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@476809a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:35:37, skipping insertion in model container [2021-10-13 07:35:37,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:35:37" (3/3) ... [2021-10-13 07:35:37,593 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0219.i [2021-10-13 07:35:37,604 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:35:37,604 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2021-10-13 07:35:37,642 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:35:37,648 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 07:35:37,648 INFO L340 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2021-10-13 07:35:37,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 89 states have internal predecessors, (99), 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 07:35:37,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:35:37,704 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:35:37,705 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:35:37,706 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:35:37,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:35:37,717 INFO L82 PathProgramCache]: Analyzing trace with hash 207769, now seen corresponding path program 1 times [2021-10-13 07:35:37,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:35:37,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778670412] [2021-10-13 07:35:37,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:35:37,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:35:37,813 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:35:37,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132215557] [2021-10-13 07:35:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:35:37,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:35:37,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:35:37,818 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:35:37,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:35:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:35:37,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:35:37,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:35:37,966 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 07:35:37,975 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 07:35:37,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:35:37,986 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 07:35:37,987 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:35:37,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778670412] [2021-10-13 07:35:37,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:35:37,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132215557] [2021-10-13 07:35:37,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132215557] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:35:37,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:35:37,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:35:37,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668911631] [2021-10-13 07:35:37,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:35:37,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:35:38,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:35:38,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:35:38,012 INFO L87 Difference]: Start difference. First operand has 90 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 89 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 07:35:38,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:35:38,138 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-10-13 07:35:38,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:35:38,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2021-10-13 07:35:38,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:35:38,149 INFO L225 Difference]: With dead ends: 113 [2021-10-13 07:35:38,149 INFO L226 Difference]: Without dead ends: 112 [2021-10-13 07:35:38,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:35:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-13 07:35:38,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 87. [2021-10-13 07:35:38,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 86 states have internal predecessors, (92), 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 07:35:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2021-10-13 07:35:38,189 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 3 [2021-10-13 07:35:38,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:35:38,190 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2021-10-13 07:35:38,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 07:35:38,190 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2021-10-13 07:35:38,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:35:38,191 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:35:38,191 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:35:38,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:35:38,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-13 07:35:38,417 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:35:38,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:35:38,418 INFO L82 PathProgramCache]: Analyzing trace with hash 6440879, now seen corresponding path program 1 times [2021-10-13 07:35:38,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:35:38,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596394292] [2021-10-13 07:35:38,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:35:38,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:35:38,437 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:35:38,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201253129] [2021-10-13 07:35:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:35:38,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:35:38,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:35:38,440 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:35:38,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 07:35:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:35:38,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:35:38,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:35:38,654 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 48 treesize of output 47 [2021-10-13 07:35:39,589 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 07:35:39,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:35:39,668 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 07:35:39,668 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:35:39,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596394292] [2021-10-13 07:35:39,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:35:39,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201253129] [2021-10-13 07:35:39,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201253129] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:35:39,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:35:39,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 07:35:39,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123989441] [2021-10-13 07:35:39,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:35:39,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:35:39,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:35:39,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:35:39,673 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:35:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:35:39,905 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2021-10-13 07:35:39,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:35:39,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 07:35:39,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:35:39,907 INFO L225 Difference]: With dead ends: 86 [2021-10-13 07:35:39,907 INFO L226 Difference]: Without dead ends: 86 [2021-10-13 07:35:39,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:35:39,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-13 07:35:39,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-10-13 07:35:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 84 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:35:39,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2021-10-13 07:35:39,916 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 4 [2021-10-13 07:35:39,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:35:39,917 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2021-10-13 07:35:39,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:35:39,917 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2021-10-13 07:35:39,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:35:39,918 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:35:39,918 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:35:39,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:35:40,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:35:40,145 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:35:40,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:35:40,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1077882261, now seen corresponding path program 1 times [2021-10-13 07:35:40,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:35:40,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487463517] [2021-10-13 07:35:40,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:35:40,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:35:40,160 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:35:40,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812214835] [2021-10-13 07:35:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:35:40,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:35:40,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:35:40,162 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:35:40,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 07:35:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:35:40,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:35:40,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:35:40,336 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 07:35:40,337 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 17 treesize of output 21 [2021-10-13 07:35:40,361 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 07:35:40,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:35:40,453 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-10-13 07:35:40,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 26 [2021-10-13 07:35:40,475 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 07:35:40,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:35:40,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487463517] [2021-10-13 07:35:40,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:35:40,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812214835] [2021-10-13 07:35:40,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812214835] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:35:40,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:35:40,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:35:40,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269353245] [2021-10-13 07:35:40,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:35:40,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:35:40,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:35:40,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:35:40,485 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:35:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:35:40,778 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2021-10-13 07:35:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:35:40,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 07:35:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:35:40,780 INFO L225 Difference]: With dead ends: 111 [2021-10-13 07:35:40,780 INFO L226 Difference]: Without dead ends: 111 [2021-10-13 07:35:40,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:35:40,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-13 07:35:40,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 82. [2021-10-13 07:35:40,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 81 states have internal predecessors, (87), 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 07:35:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2021-10-13 07:35:40,787 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 10 [2021-10-13 07:35:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:35:40,788 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2021-10-13 07:35:40,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:35:40,788 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2021-10-13 07:35:40,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:35:40,789 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:35:40,789 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:35:40,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:35:41,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:35:41,010 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:35:41,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:35:41,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1077882262, now seen corresponding path program 1 times [2021-10-13 07:35:41,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:35:41,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553835780] [2021-10-13 07:35:41,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:35:41,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:35:41,024 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:35:41,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591106942] [2021-10-13 07:35:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:35:41,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:35:41,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:35:41,026 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:35:41,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 07:35:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:35:41,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 07:35:41,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:35:41,243 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 48 treesize of output 47 [2021-10-13 07:35:41,774 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:35:41,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 81 treesize of output 73 [2021-10-13 07:35:41,789 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:35:41,790 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 73 treesize of output 69 [2021-10-13 07:35:42,029 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 07:35:42,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:35:42,208 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 07:35:42,209 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 27 treesize of output 26 [2021-10-13 07:35:42,320 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 07:35:42,321 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:35:42,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553835780] [2021-10-13 07:35:42,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:35:42,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591106942] [2021-10-13 07:35:42,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591106942] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:35:42,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:35:42,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-13 07:35:42,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281112598] [2021-10-13 07:35:42,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:35:42,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:35:42,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:35:42,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:35:42,324 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:35:49,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:35:49,806 INFO L93 Difference]: Finished difference Result 219 states and 231 transitions. [2021-10-13 07:35:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:35:49,807 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 07:35:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:35:49,809 INFO L225 Difference]: With dead ends: 219 [2021-10-13 07:35:49,810 INFO L226 Difference]: Without dead ends: 219 [2021-10-13 07:35:49,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 3222.9ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-10-13 07:35:49,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-10-13 07:35:49,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 86. [2021-10-13 07:35:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 85 states have internal predecessors, (94), 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 07:35:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2021-10-13 07:35:49,819 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 10 [2021-10-13 07:35:49,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:35:49,819 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2021-10-13 07:35:49,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:35:49,820 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2021-10-13 07:35:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:35:49,820 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:35:49,821 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:35:49,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:35:50,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:35:50,033 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:35:50,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:35:50,034 INFO L82 PathProgramCache]: Analyzing trace with hash -945537489, now seen corresponding path program 1 times [2021-10-13 07:35:50,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:35:50,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420006910] [2021-10-13 07:35:50,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:35:50,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:35:50,042 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:35:50,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339611575] [2021-10-13 07:35:50,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:35:50,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:35:50,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:35:50,066 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:35:50,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 07:35:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:35:50,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 07:35:50,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:35:50,224 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 15 treesize of output 14 [2021-10-13 07:35:50,456 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:35:50,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 41 treesize of output 39 [2021-10-13 07:35:50,467 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:35:50,468 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 39 treesize of output 39 [2021-10-13 07:35:50,528 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 07:35:50,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:35:50,657 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 07:35:50,657 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 27 treesize of output 26 [2021-10-13 07:35:50,737 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 07:35:50,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:35:50,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420006910] [2021-10-13 07:35:50,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:35:50,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339611575] [2021-10-13 07:35:50,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339611575] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:35:50,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:35:50,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-13 07:35:50,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930705959] [2021-10-13 07:35:50,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:35:50,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:35:50,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:35:50,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:35:50,740 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 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 07:35:52,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:35:52,084 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2021-10-13 07:35:52,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:35:52,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 07:35:52,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:35:52,086 INFO L225 Difference]: With dead ends: 114 [2021-10-13 07:35:52,087 INFO L226 Difference]: Without dead ends: 114 [2021-10-13 07:35:52,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1007.3ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:35:52,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-13 07:35:52,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 79. [2021-10-13 07:35:52,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 41 states have (on average 2.048780487804878) internal successors, (84), 78 states have internal predecessors, (84), 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 07:35:52,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2021-10-13 07:35:52,093 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 11 [2021-10-13 07:35:52,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:35:52,093 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2021-10-13 07:35:52,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 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 07:35:52,094 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2021-10-13 07:35:52,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:35:52,094 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:35:52,095 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:35:52,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:35:52,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:35:52,295 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:35:52,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:35:52,296 INFO L82 PathProgramCache]: Analyzing trace with hash 757865649, now seen corresponding path program 1 times [2021-10-13 07:35:52,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:35:52,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081254770] [2021-10-13 07:35:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:35:52,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:35:52,318 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:35:52,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948432469] [2021-10-13 07:35:52,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:35:52,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:35:52,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:35:52,340 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:35:52,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 07:35:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:35:52,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 07:35:52,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:35:52,529 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 07:35:52,529 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 17 treesize of output 21 [2021-10-13 07:35:52,604 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-13 07:35:52,605 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 3 case distinctions, treesize of input 21 treesize of output 26 [2021-10-13 07:35:52,666 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 07:35:52,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:35:52,799 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-10-13 07:35:52,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 26 [2021-10-13 07:35:52,810 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 07:35:52,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:35:52,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081254770] [2021-10-13 07:35:52,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:35:52,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948432469] [2021-10-13 07:35:52,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948432469] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:35:52,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:35:52,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 07:35:52,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499582991] [2021-10-13 07:35:52,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 07:35:52,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:35:52,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 07:35:52,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:35:52,814 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:35:53,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:35:53,004 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2021-10-13 07:35:53,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:35:53,005 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 07:35:53,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:35:53,006 INFO L225 Difference]: With dead ends: 105 [2021-10-13 07:35:53,006 INFO L226 Difference]: Without dead ends: 105 [2021-10-13 07:35:53,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:35:53,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-13 07:35:53,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 76. [2021-10-13 07:35:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 41 states have (on average 1.975609756097561) internal successors, (81), 75 states have internal predecessors, (81), 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 07:35:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2021-10-13 07:35:53,012 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 12 [2021-10-13 07:35:53,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:35:53,012 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2021-10-13 07:35:53,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:35:53,013 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2021-10-13 07:35:53,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:35:53,013 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:35:53,014 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:35:53,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:35:53,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:35:53,241 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:35:53,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:35:53,242 INFO L82 PathProgramCache]: Analyzing trace with hash 757865650, now seen corresponding path program 1 times [2021-10-13 07:35:53,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:35:53,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516269561] [2021-10-13 07:35:53,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:35:53,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:35:53,262 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:35:53,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587591544] [2021-10-13 07:35:53,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:35:53,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:35:53,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:35:53,289 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:35:53,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 07:35:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:35:53,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-13 07:35:53,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:35:53,533 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 48 treesize of output 47 [2021-10-13 07:35:55,536 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-13 07:35:55,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 72 treesize of output 66 [2021-10-13 07:35:55,558 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 07:35:55,559 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 66 treesize of output 70 [2021-10-13 07:35:56,868 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-13 07:35:56,869 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 3 case distinctions, treesize of input 80 treesize of output 77 [2021-10-13 07:35:56,885 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-10-13 07:35:56,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 75 [2021-10-13 07:35:58,107 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 07:35:58,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:35:58,718 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-10-13 07:35:58,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 43 [2021-10-13 07:35:59,024 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 07:35:59,024 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:35:59,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516269561] [2021-10-13 07:35:59,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:35:59,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587591544] [2021-10-13 07:35:59,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587591544] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:35:59,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:35:59,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-10-13 07:35:59,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702372418] [2021-10-13 07:35:59,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 07:35:59,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:35:59,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 07:35:59,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:35:59,027 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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 07:36:13,585 WARN L207 SmtUtils]: Spent 6.09 s on a formula simplification. DAG size of input: 150 DAG size of output: 131 [2021-10-13 07:36:19,719 WARN L207 SmtUtils]: Spent 5.18 s on a formula simplification. DAG size of input: 146 DAG size of output: 129 [2021-10-13 07:36:31,354 WARN L207 SmtUtils]: Spent 5.61 s on a formula simplification. DAG size of input: 149 DAG size of output: 134 [2021-10-13 07:36:59,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:36:59,089 INFO L93 Difference]: Finished difference Result 296 states and 314 transitions. [2021-10-13 07:36:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 07:36:59,090 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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) Word has length 12 [2021-10-13 07:36:59,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:36:59,091 INFO L225 Difference]: With dead ends: 296 [2021-10-13 07:36:59,091 INFO L226 Difference]: Without dead ends: 296 [2021-10-13 07:36:59,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 36191.5ms TimeCoverageRelationStatistics Valid=288, Invalid=704, Unknown=0, NotChecked=0, Total=992 [2021-10-13 07:36:59,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-10-13 07:36:59,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 86. [2021-10-13 07:36:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 52 states have (on average 1.8076923076923077) internal successors, (94), 85 states have internal predecessors, (94), 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 07:36:59,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2021-10-13 07:36:59,100 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 12 [2021-10-13 07:36:59,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:36:59,100 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2021-10-13 07:36:59,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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 07:36:59,101 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2021-10-13 07:36:59,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:36:59,101 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:59,102 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:36:59,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:59,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:36:59,302 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:36:59,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:59,303 INFO L82 PathProgramCache]: Analyzing trace with hash 2137912672, now seen corresponding path program 1 times [2021-10-13 07:36:59,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:36:59,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005366149] [2021-10-13 07:36:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:59,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:36:59,316 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:36:59,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485869704] [2021-10-13 07:36:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:59,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:36:59,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:36:59,318 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:36:59,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 07:36:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:59,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-13 07:36:59,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:59,575 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 10 treesize of output 9 [2021-10-13 07:36:59,674 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-13 07:36:59,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 30 treesize of output 32 [2021-10-13 07:36:59,702 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 07:36:59,703 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 29 treesize of output 33 [2021-10-13 07:36:59,846 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-13 07:36:59,846 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 3 case distinctions, treesize of input 38 treesize of output 43 [2021-10-13 07:36:59,864 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 07:36:59,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-10-13 07:37:00,075 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 07:37:00,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:37:00,568 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-10-13 07:37:00,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 43 [2021-10-13 07:37:00,863 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 07:37:00,863 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:37:00,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005366149] [2021-10-13 07:37:00,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:37:00,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485869704] [2021-10-13 07:37:00,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485869704] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:37:00,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:37:00,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-13 07:37:00,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937870416] [2021-10-13 07:37:00,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 07:37:00,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:37:00,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 07:37:00,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:37:00,866 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 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 07:37:01,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:37:01,803 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2021-10-13 07:37:01,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:37:01,803 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 07:37:01,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:37:01,804 INFO L225 Difference]: With dead ends: 117 [2021-10-13 07:37:01,804 INFO L226 Difference]: Without dead ends: 117 [2021-10-13 07:37:01,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 438.7ms TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-10-13 07:37:01,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-13 07:37:01,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 73. [2021-10-13 07:37:01,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 72 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:37:01,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2021-10-13 07:37:01,810 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 13 [2021-10-13 07:37:01,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:37:01,810 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2021-10-13 07:37:01,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 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 07:37:01,811 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2021-10-13 07:37:01,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:37:01,811 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:37:01,811 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:37:01,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:37:02,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:37:02,025 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:37:02,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:37:02,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1271452532, now seen corresponding path program 1 times [2021-10-13 07:37:02,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:37:02,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787429031] [2021-10-13 07:37:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:02,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:37:02,036 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:37:02,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313231055] [2021-10-13 07:37:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:02,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:37:02,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:37:02,042 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:37:02,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 07:37:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:37:02,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:37:02,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:37:02,338 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-10-13 07:37:02,338 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 07:37:02,542 INFO L354 Elim1Store]: treesize reduction 76, result has 39.2 percent of original size [2021-10-13 07:37:02,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 76 [2021-10-13 07:37:03,550 INFO L354 Elim1Store]: treesize reduction 122, result has 30.7 percent of original size [2021-10-13 07:37:03,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 50 treesize of output 92 [2021-10-13 07:37:04,864 INFO L354 Elim1Store]: treesize reduction 160, result has 31.9 percent of original size [2021-10-13 07:37:04,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 58 treesize of output 119 [2021-10-13 07:37:07,831 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 07:37:07,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:37:10,145 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 07:37:10,146 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:37:10,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787429031] [2021-10-13 07:37:10,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:37:10,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313231055] [2021-10-13 07:37:10,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313231055] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:37:10,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:37:10,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 11 [2021-10-13 07:37:10,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404872356] [2021-10-13 07:37:10,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 07:37:10,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:37:10,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 07:37:10,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=105, Unknown=1, NotChecked=0, Total=156 [2021-10-13 07:37:10,148 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 07:37:28,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:37:28,903 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2021-10-13 07:37:28,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:37:28,904 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) Word has length 16 [2021-10-13 07:37:28,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:37:28,905 INFO L225 Difference]: With dead ends: 109 [2021-10-13 07:37:28,905 INFO L226 Difference]: Without dead ends: 109 [2021-10-13 07:37:28,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 3584.7ms TimeCoverageRelationStatistics Valid=103, Invalid=168, Unknown=1, NotChecked=0, Total=272 [2021-10-13 07:37:28,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-13 07:37:28,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2021-10-13 07:37:28,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 70 states have internal predecessors, (77), 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 07:37:28,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-10-13 07:37:28,909 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 16 [2021-10-13 07:37:28,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:37:28,909 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-10-13 07:37:28,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 07:37:28,910 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-10-13 07:37:28,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:37:28,910 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:37:28,911 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:37:28,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:37:29,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:37:29,117 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:37:29,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:37:29,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1271452533, now seen corresponding path program 1 times [2021-10-13 07:37:29,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:37:29,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484933562] [2021-10-13 07:37:29,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:29,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:37:29,128 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:37:29,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257906916] [2021-10-13 07:37:29,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:29,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:37:29,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:37:29,137 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:37:29,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 07:37:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:37:29,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 07:37:29,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:37:29,453 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-10-13 07:37:29,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2021-10-13 07:37:29,497 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-13 07:37:29,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 19 [2021-10-13 07:37:31,687 INFO L354 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2021-10-13 07:37:31,688 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 3 case distinctions, treesize of input 31 treesize of output 40 [2021-10-13 07:37:33,867 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-10-13 07:37:33,867 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 3 case distinctions, treesize of input 24 treesize of output 37 [2021-10-13 07:37:34,762 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 07:37:34,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:37:35,308 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 07:37:35,308 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:37:35,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484933562] [2021-10-13 07:37:35,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:37:35,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257906916] [2021-10-13 07:37:35,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257906916] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:37:35,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:37:35,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-10-13 07:37:35,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481049622] [2021-10-13 07:37:35,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:37:35,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:37:35,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:37:35,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:37:35,310 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 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 07:37:45,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:37:45,135 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2021-10-13 07:37:45,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:37:45,136 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 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) Word has length 16 [2021-10-13 07:37:45,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:37:45,138 INFO L225 Difference]: With dead ends: 187 [2021-10-13 07:37:45,139 INFO L226 Difference]: Without dead ends: 187 [2021-10-13 07:37:45,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 8460.7ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:37:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-10-13 07:37:45,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 86. [2021-10-13 07:37:45,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.507936507936508) internal successors, (95), 85 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:37:45,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-10-13 07:37:45,146 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 16 [2021-10-13 07:37:45,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:37:45,146 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-10-13 07:37:45,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 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 07:37:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-10-13 07:37:45,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 07:37:45,147 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:37:45,147 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:37:45,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:37:45,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-13 07:37:45,373 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:37:45,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:37:45,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1365290053, now seen corresponding path program 1 times [2021-10-13 07:37:45,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:37:45,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290116062] [2021-10-13 07:37:45,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:45,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:37:45,390 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:37:45,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012620412] [2021-10-13 07:37:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:45,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:37:45,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:37:45,394 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:37:45,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 07:37:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:37:45,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:37:45,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:37:45,881 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 17 treesize of output 13 [2021-10-13 07:37:45,901 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 17 treesize of output 9 [2021-10-13 07:37:45,908 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 07:37:45,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:37:45,937 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 32 treesize of output 28 [2021-10-13 07:37:46,110 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 07:37:46,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:37:46,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290116062] [2021-10-13 07:37:46,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:37:46,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012620412] [2021-10-13 07:37:46,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012620412] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:37:46,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:37:46,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-13 07:37:46,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622646902] [2021-10-13 07:37:46,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:37:46,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:37:46,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:37:46,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:37:46,113 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:37:46,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:37:46,358 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2021-10-13 07:37:46,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:37:46,359 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 07:37:46,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:37:46,360 INFO L225 Difference]: With dead ends: 113 [2021-10-13 07:37:46,360 INFO L226 Difference]: Without dead ends: 113 [2021-10-13 07:37:46,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:37:46,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-13 07:37:46,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2021-10-13 07:37:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.515625) internal successors, (97), 86 states have internal predecessors, (97), 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 07:37:46,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2021-10-13 07:37:46,364 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 21 [2021-10-13 07:37:46,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:37:46,365 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2021-10-13 07:37:46,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:37:46,365 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2021-10-13 07:37:46,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 07:37:46,366 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:37:46,366 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:37:46,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:37:46,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-13 07:37:46,573 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:37:46,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:37:46,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1365290052, now seen corresponding path program 1 times [2021-10-13 07:37:46,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:37:46,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125749681] [2021-10-13 07:37:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:46,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:37:46,583 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:37:46,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562712323] [2021-10-13 07:37:46,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:46,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:37:46,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:37:46,584 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:37:46,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 07:37:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:37:46,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 07:37:46,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:37:47,242 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 33 treesize of output 29 [2021-10-13 07:37:47,245 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 30 treesize of output 26 [2021-10-13 07:37:47,285 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 37 treesize of output 29 [2021-10-13 07:37:47,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-10-13 07:37:47,311 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 07:37:47,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:37:47,384 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 60 treesize of output 56 [2021-10-13 07:37:47,386 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 90 treesize of output 82 [2021-10-13 07:37:47,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:37:47,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:37:47,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:37:47,627 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 26 [2021-10-13 07:37:47,857 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 07:37:47,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:37:47,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125749681] [2021-10-13 07:37:47,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:37:47,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562712323] [2021-10-13 07:37:47,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562712323] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:37:47,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:37:47,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 14 [2021-10-13 07:37:47,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549642984] [2021-10-13 07:37:47,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 07:37:47,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:37:47,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 07:37:47,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:37:47,860 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 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 07:37:48,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:37:48,162 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2021-10-13 07:37:48,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:37:48,163 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 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 07:37:48,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:37:48,164 INFO L225 Difference]: With dead ends: 122 [2021-10-13 07:37:48,164 INFO L226 Difference]: Without dead ends: 122 [2021-10-13 07:37:48,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 317.0ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-10-13 07:37:48,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-13 07:37:48,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2021-10-13 07:37:48,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.5) internal successors, (96), 86 states have internal predecessors, (96), 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 07:37:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2021-10-13 07:37:48,175 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 21 [2021-10-13 07:37:48,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:37:48,175 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2021-10-13 07:37:48,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 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 07:37:48,176 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2021-10-13 07:37:48,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 07:37:48,176 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:37:48,177 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:37:48,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:37:48,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-13 07:37:48,389 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:37:48,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:37:48,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2078638933, now seen corresponding path program 1 times [2021-10-13 07:37:48,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:37:48,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631550394] [2021-10-13 07:37:48,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:48,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:37:48,400 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:37:48,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91920576] [2021-10-13 07:37:48,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:48,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:37:48,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:37:48,408 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:37:48,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 07:37:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:37:48,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:37:48,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:37:48,842 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 17 treesize of output 9 [2021-10-13 07:37:48,850 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 07:37:48,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:37:48,867 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-10-13 07:37:48,868 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 16 treesize of output 15 [2021-10-13 07:37:48,912 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 07:37:48,912 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:37:48,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631550394] [2021-10-13 07:37:48,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:37:48,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91920576] [2021-10-13 07:37:48,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91920576] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:37:48,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:37:48,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 07:37:48,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441111869] [2021-10-13 07:37:48,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:37:48,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:37:48,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:37:48,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:37:48,915 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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 07:37:49,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:37:49,068 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-10-13 07:37:49,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:37:49,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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) Word has length 23 [2021-10-13 07:37:49,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:37:49,070 INFO L225 Difference]: With dead ends: 98 [2021-10-13 07:37:49,070 INFO L226 Difference]: Without dead ends: 98 [2021-10-13 07:37:49,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:37:49,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-13 07:37:49,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2021-10-13 07:37:49,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.484375) internal successors, (95), 85 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:37:49,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-10-13 07:37:49,073 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 23 [2021-10-13 07:37:49,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:37:49,073 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-10-13 07:37:49,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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 07:37:49,074 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-10-13 07:37:49,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 07:37:49,074 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:37:49,074 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:37:49,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:37:49,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:37:49,275 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:37:49,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:37:49,276 INFO L82 PathProgramCache]: Analyzing trace with hash -2078638932, now seen corresponding path program 1 times [2021-10-13 07:37:49,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:37:49,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997169055] [2021-10-13 07:37:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:49,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:37:49,284 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:37:49,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176672441] [2021-10-13 07:37:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:49,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:37:49,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:37:49,296 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:37:49,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 07:37:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:37:49,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 07:37:49,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:37:49,993 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 30 treesize of output 26 [2021-10-13 07:37:49,996 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 23 treesize of output 19 [2021-10-13 07:37:50,109 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 37 treesize of output 29 [2021-10-13 07:37:50,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-10-13 07:37:50,138 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 07:37:50,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:37:50,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 71 [2021-10-13 07:37:50,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 105 [2021-10-13 07:37:50,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:37:50,599 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 26 [2021-10-13 07:37:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:50,918 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:37:50,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997169055] [2021-10-13 07:37:50,918 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:37:50,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176672441] [2021-10-13 07:37:50,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176672441] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:37:50,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:37:50,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 16 [2021-10-13 07:37:50,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674034562] [2021-10-13 07:37:50,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 07:37:50,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:37:50,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 07:37:50,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-10-13 07:37:50,936 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:37:51,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:37:51,491 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2021-10-13 07:37:51,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:37:51,492 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-13 07:37:51,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:37:51,492 INFO L225 Difference]: With dead ends: 119 [2021-10-13 07:37:51,493 INFO L226 Difference]: Without dead ends: 119 [2021-10-13 07:37:51,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 535.4ms TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-10-13 07:37:51,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-13 07:37:51,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 88. [2021-10-13 07:37:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 87 states have internal predecessors, (97), 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 07:37:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2021-10-13 07:37:51,497 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 23 [2021-10-13 07:37:51,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:37:51,497 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2021-10-13 07:37:51,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:37:51,498 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2021-10-13 07:37:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 07:37:51,499 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:37:51,499 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:37:51,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-13 07:37:51,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-13 07:37:51,725 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:37:51,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:37:51,726 INFO L82 PathProgramCache]: Analyzing trace with hash -13295280, now seen corresponding path program 1 times [2021-10-13 07:37:51,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:37:51,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107934014] [2021-10-13 07:37:51,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:51,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:37:51,739 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:37:51,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774405188] [2021-10-13 07:37:51,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:51,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:37:51,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:37:51,750 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:37:51,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 07:37:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:37:52,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-13 07:37:52,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:37:52,273 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-10-13 07:37:52,273 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 07:37:52,461 INFO L354 Elim1Store]: treesize reduction 44, result has 45.7 percent of original size [2021-10-13 07:37:52,461 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 07:37:52,927 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 19 treesize of output 15 [2021-10-13 07:37:53,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:37:53,007 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 23 treesize of output 22 [2021-10-13 07:37:53,025 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 25 treesize of output 24 [2021-10-13 07:37:53,031 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 07:37:53,116 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 43 treesize of output 35 [2021-10-13 07:37:53,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:37:53,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 16 [2021-10-13 07:37:53,181 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 07:37:53,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:37:53,296 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 111 treesize of output 103 [2021-10-13 07:38:02,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:38:02,714 INFO L354 Elim1Store]: treesize reduction 196, result has 54.3 percent of original size [2021-10-13 07:38:02,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 63341 treesize of output 60505 [2021-10-13 07:38:05,822 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:38:05,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107934014] [2021-10-13 07:38:05,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:38:05,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774405188] [2021-10-13 07:38:05,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:38:05,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1935329833] [2021-10-13 07:38:05,862 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-10-13 07:38:05,863 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:38:05,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:38:05,871 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:38:05,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:38:05,911 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:38:05,912 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:38:05,913 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:38:05,914 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:38:05,914 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:38:05,915 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:38:05,915 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:38:05,917 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-10-13 07:38:05,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:38:05,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:38:05,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:38:05,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 07:38:05,946 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:38:05,946 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:38:05,947 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:38:05,948 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:38:05,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:38:05,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:38:05,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:38:05,979 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:38:05,981 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-10-13 07:38:05,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:38:05,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:133, output treesize:136 [2021-10-13 07:38:06,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 07:38:06,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-13 07:38:06,202 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_144| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:38:06,207 INFO L168 Benchmark]: Toolchain (without parser) took 150190.15 ms. Allocated memory was 100.7 MB in the beginning and 283.1 MB in the end (delta: 182.5 MB). Free memory was 70.6 MB in the beginning and 142.6 MB in the end (delta: -71.9 MB). Peak memory consumption was 111.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:38:06,207 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 100.7 MB. Free memory was 54.0 MB in the beginning and 53.9 MB in the end (delta: 54.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:38:06,207 INFO L168 Benchmark]: CACSL2BoogieTranslator took 526.39 ms. Allocated memory was 100.7 MB in the beginning and 130.0 MB in the end (delta: 29.4 MB). Free memory was 70.4 MB in the beginning and 94.9 MB in the end (delta: -24.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:38:06,208 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.65 ms. Allocated memory is still 130.0 MB. Free memory was 94.9 MB in the beginning and 92.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:38:06,208 INFO L168 Benchmark]: Boogie Preprocessor took 34.40 ms. Allocated memory is still 130.0 MB. Free memory was 92.8 MB in the beginning and 90.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:38:06,208 INFO L168 Benchmark]: RCFGBuilder took 943.21 ms. Allocated memory is still 130.0 MB. Free memory was 90.7 MB in the beginning and 66.1 MB in the end (delta: 24.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:38:06,208 INFO L168 Benchmark]: TraceAbstraction took 148620.32 ms. Allocated memory was 130.0 MB in the beginning and 283.1 MB in the end (delta: 153.1 MB). Free memory was 65.5 MB in the beginning and 142.6 MB in the end (delta: -77.0 MB). Peak memory consumption was 78.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:38:06,210 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 100.7 MB. Free memory was 54.0 MB in the beginning and 53.9 MB in the end (delta: 54.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 526.39 ms. Allocated memory was 100.7 MB in the beginning and 130.0 MB in the end (delta: 29.4 MB). Free memory was 70.4 MB in the beginning and 94.9 MB in the end (delta: -24.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.65 ms. Allocated memory is still 130.0 MB. Free memory was 94.9 MB in the beginning and 92.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.40 ms. Allocated memory is still 130.0 MB. Free memory was 92.8 MB in the beginning and 90.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 943.21 ms. Allocated memory is still 130.0 MB. Free memory was 90.7 MB in the beginning and 66.1 MB in the end (delta: 24.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 148620.32 ms. Allocated memory was 130.0 MB in the beginning and 283.1 MB in the end (delta: 153.1 MB). Free memory was 65.5 MB in the beginning and 142.6 MB in the end (delta: -77.0 MB). Peak memory consumption was 78.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_144| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_144|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:38:06,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/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 07:38:08,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:38:08,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:38:08,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:38:08,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:38:08,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:38:08,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:38:08,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:38:08,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:38:08,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:38:08,916 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:38:08,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:38:08,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:38:08,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:38:08,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:38:08,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:38:08,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:38:08,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:38:08,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:38:08,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:38:08,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:38:08,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:38:08,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:38:08,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:38:08,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:38:08,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:38:08,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:38:08,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:38:08,969 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:38:08,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:38:08,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:38:08,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:38:08,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:38:08,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:38:08,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:38:08,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:38:08,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:38:08,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:38:08,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:38:08,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:38:08,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:38:08,979 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-13 07:38:09,018 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:38:09,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:38:09,020 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:38:09,021 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:38:09,021 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:38:09,021 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:38:09,021 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:38:09,021 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:38:09,022 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:38:09,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:38:09,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:38:09,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:38:09,025 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:38:09,025 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:38:09,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:38:09,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:38:09,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:38:09,026 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:38:09,026 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:38:09,026 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:38:09,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:38:09,027 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:38:09,027 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:38:09,027 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:38:09,027 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:38:09,028 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:38:09,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:38:09,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:38:09,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:38:09,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:38:09,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:38:09,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:38:09,030 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:38:09,030 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:38:09,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:38:09,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:38:09,031 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_6317390c-5f75-4be8-ba2b-5352ea9a7dea/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0a821c00018fd0a7d1057c117e3e5b172a3096a [2021-10-13 07:38:09,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:38:09,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:38:09,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:38:09,462 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:38:09,463 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:38:09,464 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety/test-0219.i [2021-10-13 07:38:09,539 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/data/a81b28faf/6b8c6ecf8d5140578a32e467a63aa37b/FLAGb1ac79d6b [2021-10-13 07:38:10,201 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:38:10,203 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/sv-benchmarks/c/memsafety/test-0219.i [2021-10-13 07:38:10,225 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/data/a81b28faf/6b8c6ecf8d5140578a32e467a63aa37b/FLAGb1ac79d6b [2021-10-13 07:38:10,421 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/data/a81b28faf/6b8c6ecf8d5140578a32e467a63aa37b [2021-10-13 07:38:10,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:38:10,425 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:38:10,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:38:10,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:38:10,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:38:10,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:38:10" (1/1) ... [2021-10-13 07:38:10,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18b58a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:10, skipping insertion in model container [2021-10-13 07:38:10,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:38:10" (1/1) ... [2021-10-13 07:38:10,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:38:10,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:38:10,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:38:10,900 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:38:10,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:38:10,993 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:38:10,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:10 WrapperNode [2021-10-13 07:38:10,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:38:10,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:38:10,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:38:10,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:38:11,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:10" (1/1) ... [2021-10-13 07:38:11,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:10" (1/1) ... [2021-10-13 07:38:11,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:38:11,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:38:11,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:38:11,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:38:11,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:10" (1/1) ... [2021-10-13 07:38:11,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:10" (1/1) ... [2021-10-13 07:38:11,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:10" (1/1) ... [2021-10-13 07:38:11,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:10" (1/1) ... [2021-10-13 07:38:11,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:10" (1/1) ... [2021-10-13 07:38:11,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:10" (1/1) ... [2021-10-13 07:38:11,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:10" (1/1) ... [2021-10-13 07:38:11,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:38:11,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:38:11,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:38:11,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:38:11,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:10" (1/1) ... [2021-10-13 07:38:11,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:38:11,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:38:11,194 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:38:11,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:38:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:38:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:38:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:38:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:38:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:38:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-13 07:38:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:38:11,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:38:11,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:38:12,024 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:38:12,024 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-13 07:38:12,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:38:12 BoogieIcfgContainer [2021-10-13 07:38:12,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:38:12,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:38:12,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:38:12,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:38:12,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:38:10" (1/3) ... [2021-10-13 07:38:12,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64707212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:38:12, skipping insertion in model container [2021-10-13 07:38:12,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:10" (2/3) ... [2021-10-13 07:38:12,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64707212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:38:12, skipping insertion in model container [2021-10-13 07:38:12,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:38:12" (3/3) ... [2021-10-13 07:38:12,037 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0219.i [2021-10-13 07:38:12,043 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:38:12,043 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2021-10-13 07:38:12,111 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:38:12,119 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 07:38:12,119 INFO L340 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2021-10-13 07:38:12,137 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 105 states have internal predecessors, (118), 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 07:38:12,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:38:12,144 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:12,145 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:38:12,146 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:38:12,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:12,172 INFO L82 PathProgramCache]: Analyzing trace with hash 925636, now seen corresponding path program 1 times [2021-10-13 07:38:12,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:38:12,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289325741] [2021-10-13 07:38:12,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:12,186 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:38:12,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:38:12,190 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:38:12,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:38:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:12,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:38:12,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:38:12,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:38:12,412 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 07:38:12,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:38:12,448 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 07:38:12,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:38:12,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289325741] [2021-10-13 07:38:12,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289325741] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:12,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:38:12,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:38:12,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70081695] [2021-10-13 07:38:12,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:38:12,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:38:12,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:38:12,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:12,494 INFO L87 Difference]: Start difference. First operand has 106 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 105 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:38:12,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:12,836 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2021-10-13 07:38:12,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:38:12,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 07:38:12,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:12,855 INFO L225 Difference]: With dead ends: 132 [2021-10-13 07:38:12,856 INFO L226 Difference]: Without dead ends: 130 [2021-10-13 07:38:12,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:38:12,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-13 07:38:12,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 102. [2021-10-13 07:38:12,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 101 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:38:12,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2021-10-13 07:38:12,915 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 4 [2021-10-13 07:38:12,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:12,916 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2021-10-13 07:38:12,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:38:12,917 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2021-10-13 07:38:12,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:38:12,917 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:12,918 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:38:12,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:38:13,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:38:13,131 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:38:13,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:13,132 INFO L82 PathProgramCache]: Analyzing trace with hash 28694756, now seen corresponding path program 1 times [2021-10-13 07:38:13,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:38:13,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347107568] [2021-10-13 07:38:13,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:13,134 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:38:13,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:38:13,141 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:38:13,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:38:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:13,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:38:13,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:38:13,296 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 07:38:13,334 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 07:38:13,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:38:13,439 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 07:38:13,440 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:38:13,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347107568] [2021-10-13 07:38:13,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347107568] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:13,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:38:13,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 07:38:13,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797643553] [2021-10-13 07:38:13,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:38:13,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:38:13,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:38:13,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:38:13,448 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:38:14,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:14,132 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2021-10-13 07:38:14,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:38:14,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 07:38:14,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:14,135 INFO L225 Difference]: With dead ends: 102 [2021-10-13 07:38:14,136 INFO L226 Difference]: Without dead ends: 102 [2021-10-13 07:38:14,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:38:14,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-13 07:38:14,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2021-10-13 07:38:14,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 56 states have (on average 1.875) internal successors, (105), 99 states have internal predecessors, (105), 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 07:38:14,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2021-10-13 07:38:14,145 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 5 [2021-10-13 07:38:14,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:14,145 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2021-10-13 07:38:14,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:38:14,146 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2021-10-13 07:38:14,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:38:14,147 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:14,147 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:14,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:38:14,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:38:14,348 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:38:14,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:14,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1069793572, now seen corresponding path program 1 times [2021-10-13 07:38:14,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:38:14,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578364365] [2021-10-13 07:38:14,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:14,350 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:38:14,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:38:14,355 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:38:14,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:38:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:14,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:38:14,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:38:14,552 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 07:38:14,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:38:14,661 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 07:38:14,662 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:38:14,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578364365] [2021-10-13 07:38:14,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578364365] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:14,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:38:14,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:38:14,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026202676] [2021-10-13 07:38:14,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:38:14,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:38:14,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:38:14,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:38:14,668 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:38:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:14,787 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2021-10-13 07:38:14,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:38:14,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 07:38:14,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:14,795 INFO L225 Difference]: With dead ends: 105 [2021-10-13 07:38:14,795 INFO L226 Difference]: Without dead ends: 105 [2021-10-13 07:38:14,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:38:14,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-13 07:38:14,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-10-13 07:38:14,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.8166666666666667) internal successors, (109), 103 states have internal predecessors, (109), 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 07:38:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-10-13 07:38:14,803 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 18 [2021-10-13 07:38:14,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:14,804 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-10-13 07:38:14,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:38:14,804 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-10-13 07:38:14,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 07:38:14,805 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:14,805 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:14,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:38:15,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:38:15,008 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:38:15,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:15,009 INFO L82 PathProgramCache]: Analyzing trace with hash 179406396, now seen corresponding path program 1 times [2021-10-13 07:38:15,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:38:15,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651886008] [2021-10-13 07:38:15,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:15,015 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:38:15,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:38:15,016 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:38:15,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:38:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:15,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:38:15,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:38:15,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:38:15,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:38:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:38:15,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:38:15,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651886008] [2021-10-13 07:38:15,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651886008] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:38:15,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1603935400] [2021-10-13 07:38:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:15,482 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:38:15,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:38:15,484 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:38:15,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-13 07:38:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:15,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:38:15,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:38:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:38:15,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:38:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:38:15,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1603935400] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:38:15,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553168064] [2021-10-13 07:38:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:15,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:38:15,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:38:15,913 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:38:15,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 07:38:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:16,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:38:16,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:38:16,118 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 07:38:16,250 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:38:16,250 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 23 treesize of output 30 [2021-10-13 07:38:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 07:38:16,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:38:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 07:38:24,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553168064] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:24,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:38:24,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6, 6, 6] total 17 [2021-10-13 07:38:24,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624167881] [2021-10-13 07:38:24,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 07:38:24,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:38:24,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 07:38:24,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=217, Unknown=3, NotChecked=0, Total=272 [2021-10-13 07:38:24,773 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 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 07:38:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:25,525 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2021-10-13 07:38:25,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:38:25,526 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 07:38:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:25,527 INFO L225 Difference]: With dead ends: 138 [2021-10-13 07:38:25,527 INFO L226 Difference]: Without dead ends: 138 [2021-10-13 07:38:25,528 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 8515.0ms TimeCoverageRelationStatistics Valid=86, Invalid=331, Unknown=3, NotChecked=0, Total=420 [2021-10-13 07:38:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-13 07:38:25,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2021-10-13 07:38:25,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 60 states have (on average 1.7666666666666666) internal successors, (106), 100 states have internal predecessors, (106), 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 07:38:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2021-10-13 07:38:25,547 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 22 [2021-10-13 07:38:25,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:25,552 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2021-10-13 07:38:25,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 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 07:38:25,553 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2021-10-13 07:38:25,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 07:38:25,553 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:25,554 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:25,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:38:25,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:38:25,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:38:26,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:38:26,155 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:38:26,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:26,155 INFO L82 PathProgramCache]: Analyzing trace with hash 179406397, now seen corresponding path program 1 times [2021-10-13 07:38:26,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:38:26,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611744878] [2021-10-13 07:38:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:26,156 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:38:26,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:38:26,157 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:38:26,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:38:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:26,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:38:26,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:38:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:38:26,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:38:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:38:26,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:38:26,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611744878] [2021-10-13 07:38:26,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611744878] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:38:26,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [717989822] [2021-10-13 07:38:26,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:26,646 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:38:26,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:38:26,648 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:38:26,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-13 07:38:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:26,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:38:26,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:38:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:38:27,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:38:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:38:27,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [717989822] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:38:27,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343066390] [2021-10-13 07:38:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:27,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:38:27,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:38:27,122 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:38:27,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 07:38:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:27,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:38:27,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:38:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:38:27,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:38:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:38:27,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343066390] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:38:27,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:38:27,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 12 [2021-10-13 07:38:27,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569604216] [2021-10-13 07:38:27,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 07:38:27,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:38:27,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 07:38:27,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:38:27,628 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:38:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:28,047 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2021-10-13 07:38:28,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:38:28,049 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 07:38:28,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:28,051 INFO L225 Difference]: With dead ends: 112 [2021-10-13 07:38:28,051 INFO L226 Difference]: Without dead ends: 112 [2021-10-13 07:38:28,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 291.3ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:38:28,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-13 07:38:28,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-10-13 07:38:28,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 68 states have (on average 1.6764705882352942) internal successors, (114), 108 states have internal predecessors, (114), 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 07:38:28,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2021-10-13 07:38:28,059 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 22 [2021-10-13 07:38:28,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:28,060 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2021-10-13 07:38:28,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:38:28,060 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2021-10-13 07:38:28,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 07:38:28,061 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:28,061 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:28,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:38:28,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:38:28,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-13 07:38:28,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:38:28,665 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:38:28,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:28,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1164168445, now seen corresponding path program 2 times [2021-10-13 07:38:28,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:38:28,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728247947] [2021-10-13 07:38:28,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:38:28,667 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:38:28,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:38:28,668 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:38:28,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 07:38:28,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 07:38:28,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:38:28,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 07:38:28,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:38:28,958 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 07:38:28,967 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 07:38:29,255 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:38:29,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 27 treesize of output 29 [2021-10-13 07:38:29,268 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:38:29,270 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 26 treesize of output 22 [2021-10-13 07:38:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-13 07:38:29,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:38:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-13 07:38:36,638 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:38:36,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728247947] [2021-10-13 07:38:36,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728247947] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:38:36,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:38:36,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-13 07:38:36,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281732964] [2021-10-13 07:38:36,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:38:36,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:38:36,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:38:36,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=65, Unknown=2, NotChecked=0, Total=90 [2021-10-13 07:38:36,641 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 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 07:38:43,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:43,013 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2021-10-13 07:38:43,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:38:43,017 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-13 07:38:43,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:43,019 INFO L225 Difference]: With dead ends: 154 [2021-10-13 07:38:43,019 INFO L226 Difference]: Without dead ends: 154 [2021-10-13 07:38:43,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 7603.3ms TimeCoverageRelationStatistics Valid=68, Invalid=140, Unknown=2, NotChecked=0, Total=210 [2021-10-13 07:38:43,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-13 07:38:43,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 106. [2021-10-13 07:38:43,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.6323529411764706) internal successors, (111), 105 states have internal predecessors, (111), 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 07:38:43,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2021-10-13 07:38:43,027 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 30 [2021-10-13 07:38:43,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:43,027 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2021-10-13 07:38:43,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 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 07:38:43,028 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2021-10-13 07:38:43,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 07:38:43,029 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:43,029 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:43,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:38:43,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:38:43,236 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:38:43,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:43,237 INFO L82 PathProgramCache]: Analyzing trace with hash 612907455, now seen corresponding path program 1 times [2021-10-13 07:38:43,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:38:43,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9304667] [2021-10-13 07:38:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:43,237 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:38:43,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:38:43,238 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:38:43,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 07:38:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:43,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:38:43,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:38:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 07:38:43,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:38:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 07:38:44,293 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:38:44,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9304667] [2021-10-13 07:38:44,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9304667] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:38:44,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1147911634] [2021-10-13 07:38:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:44,294 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:38:44,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:38:44,295 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:38:44,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 07:38:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:44,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:38:44,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:38:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 07:38:44,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:38:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 07:38:44,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1147911634] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:38:44,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860923470] [2021-10-13 07:38:44,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:44,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:38:44,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:38:44,989 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:38:45,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 07:38:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:45,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:38:45,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:38:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 07:38:45,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:38:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 07:38:45,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860923470] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:38:45,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:38:45,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 20 [2021-10-13 07:38:45,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914518333] [2021-10-13 07:38:45,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 07:38:45,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:38:45,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 07:38:45,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-10-13 07:38:45,734 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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 07:38:46,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:38:46,546 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-10-13 07:38:46,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 07:38:46,552 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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) Word has length 34 [2021-10-13 07:38:46,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:38:46,553 INFO L225 Difference]: With dead ends: 113 [2021-10-13 07:38:46,553 INFO L226 Difference]: Without dead ends: 113 [2021-10-13 07:38:46,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 667.3ms TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-10-13 07:38:46,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-13 07:38:46,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2021-10-13 07:38:46,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 72 states have (on average 1.5972222222222223) internal successors, (115), 109 states have internal predecessors, (115), 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 07:38:46,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2021-10-13 07:38:46,573 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 34 [2021-10-13 07:38:46,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:38:46,574 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2021-10-13 07:38:46,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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 07:38:46,574 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2021-10-13 07:38:46,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 07:38:46,576 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:46,577 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:38:46,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:38:46,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:38:47,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:38:47,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:38:47,191 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:38:47,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:47,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1812105503, now seen corresponding path program 2 times [2021-10-13 07:38:47,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:38:47,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73394816] [2021-10-13 07:38:47,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:38:47,192 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:38:47,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:38:47,193 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:38:47,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 07:38:47,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 07:38:47,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:38:47,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:38:47,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:38:47,497 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 07:38:47,635 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:38:47,635 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 21 treesize of output 28 [2021-10-13 07:38:48,238 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-13 07:38:48,239 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 3 case distinctions, treesize of input 36 treesize of output 47 [2021-10-13 07:38:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:38:48,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:39:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:39:00,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:39:00,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73394816] [2021-10-13 07:39:00,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73394816] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:39:00,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:39:00,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-13 07:39:00,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924963147] [2021-10-13 07:39:00,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:39:00,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:39:00,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:39:00,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=65, Unknown=4, NotChecked=0, Total=90 [2021-10-13 07:39:00,966 INFO L87 Difference]: Start difference. First operand 110 states and 115 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:39:01,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:39:01,956 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2021-10-13 07:39:01,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:39:01,956 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-13 07:39:01,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:39:01,958 INFO L225 Difference]: With dead ends: 150 [2021-10-13 07:39:01,958 INFO L226 Difference]: Without dead ends: 150 [2021-10-13 07:39:01,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 12420.5ms TimeCoverageRelationStatistics Valid=76, Invalid=160, Unknown=4, NotChecked=0, Total=240 [2021-10-13 07:39:01,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-13 07:39:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 107. [2021-10-13 07:39:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.5555555555555556) internal successors, (112), 106 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:39:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2021-10-13 07:39:01,966 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 38 [2021-10-13 07:39:01,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:39:01,967 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2021-10-13 07:39:01,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:39:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2021-10-13 07:39:01,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 07:39:01,968 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:39:01,969 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:39:01,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:39:02,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:39:02,173 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:39:02,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:39:02,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1812105504, now seen corresponding path program 1 times [2021-10-13 07:39:02,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:39:02,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524769277] [2021-10-13 07:39:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:39:02,175 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:39:02,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:39:02,178 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:39:02,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 07:39:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:39:02,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 07:39:02,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:39:02,833 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 07:39:02,846 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 07:39:03,227 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-13 07:39:03,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 31 [2021-10-13 07:39:03,287 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:39:03,287 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 28 treesize of output 28 [2021-10-13 07:39:03,862 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:39:03,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 18 [2021-10-13 07:39:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:39:04,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:39:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:39:08,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:39:08,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524769277] [2021-10-13 07:39:08,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524769277] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:39:08,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:39:08,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-13 07:39:08,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055591911] [2021-10-13 07:39:08,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 07:39:08,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:39:08,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 07:39:08,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:39:08,138 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:39:12,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:39:12,313 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2021-10-13 07:39:12,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 07:39:12,318 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-13 07:39:12,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:39:12,319 INFO L225 Difference]: With dead ends: 148 [2021-10-13 07:39:12,319 INFO L226 Difference]: Without dead ends: 148 [2021-10-13 07:39:12,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2655.2ms TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2021-10-13 07:39:12,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-13 07:39:12,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 104. [2021-10-13 07:39:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 72 states have (on average 1.5138888888888888) internal successors, (109), 103 states have internal predecessors, (109), 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 07:39:12,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-10-13 07:39:12,325 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 38 [2021-10-13 07:39:12,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:39:12,326 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-10-13 07:39:12,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:39:12,326 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-10-13 07:39:12,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-13 07:39:12,327 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:39:12,327 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:39:12,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-10-13 07:39:12,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:39:12,543 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:39:12,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:39:12,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1003649363, now seen corresponding path program 1 times [2021-10-13 07:39:12,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:39:12,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978171653] [2021-10-13 07:39:12,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:39:12,544 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:39:12,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:39:12,546 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:39:12,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 07:39:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:39:13,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 07:39:13,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:39:13,284 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-10-13 07:39:13,285 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 37 [2021-10-13 07:39:13,504 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 07:39:13,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 21 [2021-10-13 07:39:13,921 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-13 07:39:13,921 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 3 case distinctions, treesize of input 33 treesize of output 44 [2021-10-13 07:39:14,651 INFO L354 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2021-10-13 07:39:14,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 70 [2021-10-13 07:39:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:39:15,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:39:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:39:16,325 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:39:16,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978171653] [2021-10-13 07:39:16,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978171653] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:39:16,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:39:16,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 10] imperfect sequences [] total 18 [2021-10-13 07:39:16,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463088530] [2021-10-13 07:39:16,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 07:39:16,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:39:16,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 07:39:16,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-10-13 07:39:16,327 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 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 07:39:17,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:39:17,874 INFO L93 Difference]: Finished difference Result 153 states and 159 transitions. [2021-10-13 07:39:17,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:39:17,875 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-10-13 07:39:17,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:39:17,876 INFO L225 Difference]: With dead ends: 153 [2021-10-13 07:39:17,877 INFO L226 Difference]: Without dead ends: 153 [2021-10-13 07:39:17,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1334.6ms TimeCoverageRelationStatistics Valid=290, Invalid=466, Unknown=0, NotChecked=0, Total=756 [2021-10-13 07:39:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-13 07:39:17,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 99. [2021-10-13 07:39:17,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.4444444444444444) internal successors, (104), 98 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:39:17,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2021-10-13 07:39:17,882 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 43 [2021-10-13 07:39:17,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:39:17,882 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2021-10-13 07:39:17,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 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 07:39:17,883 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2021-10-13 07:39:17,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-13 07:39:17,884 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:39:17,884 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:39:17,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 07:39:18,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:39:18,093 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:39:18,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:39:18,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1003649362, now seen corresponding path program 1 times [2021-10-13 07:39:18,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:39:18,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386895494] [2021-10-13 07:39:18,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:39:18,094 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:39:18,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:39:18,096 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:39:18,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 07:39:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:39:18,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 07:39:18,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:39:18,845 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-10-13 07:39:18,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 42 [2021-10-13 07:39:18,961 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-10-13 07:39:18,961 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 42 treesize of output 63 [2021-10-13 07:39:19,387 INFO L354 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2021-10-13 07:39:19,388 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 3 case distinctions, treesize of input 46 treesize of output 53 [2021-10-13 07:39:19,533 INFO L354 Elim1Store]: treesize reduction -2, result has 108.0 percent of original size [2021-10-13 07:39:19,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 70 [2021-10-13 07:39:21,879 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:39:21,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 18 [2021-10-13 07:39:22,519 INFO L354 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2021-10-13 07:39:22,520 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 3 case distinctions, treesize of input 21 treesize of output 42 [2021-10-13 07:39:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:39:23,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:39:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:39:25,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:39:25,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386895494] [2021-10-13 07:39:25,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386895494] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:39:25,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:39:25,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 10 [2021-10-13 07:39:25,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283723658] [2021-10-13 07:39:25,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 07:39:25,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:39:25,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 07:39:25,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:39:25,301 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 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 07:39:29,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:39:29,345 INFO L93 Difference]: Finished difference Result 226 states and 235 transitions. [2021-10-13 07:39:29,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:39:29,346 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 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 43 [2021-10-13 07:39:29,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:39:29,349 INFO L225 Difference]: With dead ends: 226 [2021-10-13 07:39:29,349 INFO L226 Difference]: Without dead ends: 226 [2021-10-13 07:39:29,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2132.0ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-10-13 07:39:29,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-10-13 07:39:29,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 101. [2021-10-13 07:39:29,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 76 states have (on average 1.4210526315789473) internal successors, (108), 100 states have internal predecessors, (108), 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 07:39:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2021-10-13 07:39:29,354 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 43 [2021-10-13 07:39:29,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:39:29,355 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2021-10-13 07:39:29,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 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 07:39:29,355 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2021-10-13 07:39:29,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-13 07:39:29,356 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:39:29,357 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:39:29,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:39:29,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:39:29,572 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:39:29,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:39:29,573 INFO L82 PathProgramCache]: Analyzing trace with hash -709520902, now seen corresponding path program 1 times [2021-10-13 07:39:29,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:39:29,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468003606] [2021-10-13 07:39:29,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:39:29,574 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:39:29,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:39:29,575 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:39:29,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 07:39:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:39:30,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:39:30,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:39:31,052 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 19 treesize of output 15 [2021-10-13 07:39:31,090 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 21 treesize of output 13 [2021-10-13 07:39:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:39:31,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:39:31,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-10-13 07:39:31,517 INFO L354 Elim1Store]: treesize reduction -1, result has 104.0 percent of original size [2021-10-13 07:39:31,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2021-10-13 07:39:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:39:32,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:39:32,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468003606] [2021-10-13 07:39:32,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468003606] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:39:32,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:39:32,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-10-13 07:39:32,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214517313] [2021-10-13 07:39:32,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:39:32,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:39:32,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:39:32,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:39:32,246 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:39:33,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:39:33,206 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2021-10-13 07:39:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:39:33,207 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-10-13 07:39:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:39:33,208 INFO L225 Difference]: With dead ends: 144 [2021-10-13 07:39:33,208 INFO L226 Difference]: Without dead ends: 144 [2021-10-13 07:39:33,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 370.1ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:39:33,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-13 07:39:33,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 101. [2021-10-13 07:39:33,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 76 states have (on average 1.4078947368421053) internal successors, (107), 100 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:39:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2021-10-13 07:39:33,212 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 49 [2021-10-13 07:39:33,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:39:33,212 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2021-10-13 07:39:33,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:39:33,213 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2021-10-13 07:39:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-13 07:39:33,214 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:39:33,215 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:39:33,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 07:39:33,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:39:33,422 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:39:33,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:39:33,423 INFO L82 PathProgramCache]: Analyzing trace with hash -709520901, now seen corresponding path program 1 times [2021-10-13 07:39:33,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:39:33,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645461714] [2021-10-13 07:39:33,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:39:33,424 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:39:33,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:39:33,425 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:39:33,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 07:39:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:39:34,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 07:39:34,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:39:35,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 07:39:35,332 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 07:39:35,397 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 31 treesize of output 23 [2021-10-13 07:39:35,401 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 20 treesize of output 12 [2021-10-13 07:39:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:39:35,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:39:35,647 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 36 treesize of output 28 [2021-10-13 07:39:35,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:39:35,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:39:35,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:39:35,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:39:35,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:39:35,909 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 28 treesize of output 32 [2021-10-13 07:39:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:39:37,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:39:37,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645461714] [2021-10-13 07:39:37,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645461714] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:39:37,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:39:37,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2021-10-13 07:39:37,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221083559] [2021-10-13 07:39:37,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 07:39:37,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:39:37,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 07:39:37,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:39:37,854 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 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 07:39:39,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:39:39,628 INFO L93 Difference]: Finished difference Result 163 states and 170 transitions. [2021-10-13 07:39:39,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 07:39:39,629 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 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 49 [2021-10-13 07:39:39,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:39:39,631 INFO L225 Difference]: With dead ends: 163 [2021-10-13 07:39:39,631 INFO L226 Difference]: Without dead ends: 163 [2021-10-13 07:39:39,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1341.4ms TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2021-10-13 07:39:39,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-13 07:39:39,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 101. [2021-10-13 07:39:39,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 76 states have (on average 1.394736842105263) internal successors, (106), 100 states have internal predecessors, (106), 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 07:39:39,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2021-10-13 07:39:39,636 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 49 [2021-10-13 07:39:39,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:39:39,636 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2021-10-13 07:39:39,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 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 07:39:39,637 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2021-10-13 07:39:39,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 07:39:39,637 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:39:39,638 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:39:39,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-10-13 07:39:39,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:39:39,854 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:39:39,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:39:39,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1803046405, now seen corresponding path program 1 times [2021-10-13 07:39:39,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:39:39,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489733602] [2021-10-13 07:39:39,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:39:39,855 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:39:39,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:39:39,856 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:39:39,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 07:39:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:39:40,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:39:40,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:39:41,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-13 07:39:41,400 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 21 treesize of output 13 [2021-10-13 07:39:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:39:41,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:39:41,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-10-13 07:39:41,757 INFO L354 Elim1Store]: treesize reduction -1, result has 104.0 percent of original size [2021-10-13 07:39:41,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2021-10-13 07:39:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:39:42,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:39:42,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489733602] [2021-10-13 07:39:42,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489733602] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:39:42,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:39:42,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-10-13 07:39:42,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282414234] [2021-10-13 07:39:42,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:39:42,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:39:42,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:39:42,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:39:42,389 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:39:43,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:39:43,280 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2021-10-13 07:39:43,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:39:43,281 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-10-13 07:39:43,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:39:43,282 INFO L225 Difference]: With dead ends: 155 [2021-10-13 07:39:43,282 INFO L226 Difference]: Without dead ends: 155 [2021-10-13 07:39:43,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 287.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:39:43,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-10-13 07:39:43,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 102. [2021-10-13 07:39:43,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 77 states have (on average 1.4025974025974026) internal successors, (108), 101 states have internal predecessors, (108), 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 07:39:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2021-10-13 07:39:43,288 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 52 [2021-10-13 07:39:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:39:43,288 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2021-10-13 07:39:43,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:39:43,288 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2021-10-13 07:39:43,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 07:39:43,289 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:39:43,290 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:39:43,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 07:39:43,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:39:43,497 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:39:43,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:39:43,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1803046404, now seen corresponding path program 1 times [2021-10-13 07:39:43,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:39:43,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294871536] [2021-10-13 07:39:43,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:39:43,498 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:39:43,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:39:43,500 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:39:43,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 07:39:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:39:44,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 07:39:44,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:39:45,733 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 11 treesize of output 7 [2021-10-13 07:39:45,740 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 17 treesize of output 13 [2021-10-13 07:39:45,825 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 31 treesize of output 23 [2021-10-13 07:39:45,829 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 20 treesize of output 12 [2021-10-13 07:39:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:39:45,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:39:46,111 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 60 treesize of output 56 [2021-10-13 07:39:46,116 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 90 treesize of output 82 [2021-10-13 07:39:46,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-10-13 07:39:46,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:39:46,688 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 30 treesize of output 34 [2021-10-13 07:39:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:39:48,477 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:39:48,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294871536] [2021-10-13 07:39:48,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294871536] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:39:48,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:39:48,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2021-10-13 07:39:48,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001191405] [2021-10-13 07:39:48,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 07:39:48,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:39:48,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 07:39:48,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:39:48,479 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 16 states, 15 states have (on average 4.933333333333334) internal successors, (74), 16 states have internal predecessors, (74), 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 07:39:50,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:39:50,427 INFO L93 Difference]: Finished difference Result 161 states and 168 transitions. [2021-10-13 07:39:50,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 07:39:50,428 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.933333333333334) internal successors, (74), 16 states have internal predecessors, (74), 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 52 [2021-10-13 07:39:50,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:39:50,429 INFO L225 Difference]: With dead ends: 161 [2021-10-13 07:39:50,430 INFO L226 Difference]: Without dead ends: 161 [2021-10-13 07:39:50,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1368.5ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-10-13 07:39:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-10-13 07:39:50,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 102. [2021-10-13 07:39:50,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 77 states have (on average 1.3896103896103895) internal successors, (107), 101 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:39:50,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2021-10-13 07:39:50,434 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 52 [2021-10-13 07:39:50,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:39:50,434 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2021-10-13 07:39:50,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.933333333333334) internal successors, (74), 16 states have internal predecessors, (74), 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 07:39:50,434 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2021-10-13 07:39:50,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-13 07:39:50,435 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:39:50,435 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:39:50,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 07:39:50,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:39:50,646 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-13 07:39:50,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:39:50,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1855772065, now seen corresponding path program 1 times [2021-10-13 07:39:50,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:39:50,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442580860] [2021-10-13 07:39:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:39:50,646 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:39:50,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:39:50,647 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:39:50,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 07:39:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:39:51,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 07:39:51,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:39:52,035 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-10-13 07:39:52,036 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 37 [2021-10-13 07:39:52,244 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:39:52,244 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 07:39:53,739 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 22 treesize of output 18 [2021-10-13 07:39:53,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:39:53,888 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 26 [2021-10-13 07:39:53,957 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 30 treesize of output 29 [2021-10-13 07:39:53,973 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 07:39:54,115 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 50 treesize of output 42 [2021-10-13 07:39:54,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:39:54,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-10-13 07:39:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:39:54,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:39:54,467 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 112 treesize of output 108 [2021-10-13 07:40:13,362 INFO L354 Elim1Store]: treesize reduction 196, result has 54.3 percent of original size [2021-10-13 07:40:13,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 11611 treesize of output 11399 [2021-10-13 07:40:14,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:40:14,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442580860] [2021-10-13 07:40:14,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:40:14,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1376988988] [2021-10-13 07:40:14,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:14,498 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:40:14,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:40:14,500 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:40:14,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-10-13 07:40:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:16,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-13 07:40:16,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:40:17,479 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 07:40:17,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 22 [2021-10-13 07:40:19,315 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-13 07:40:19,315 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 3 case distinctions, treesize of input 34 treesize of output 45 [2021-10-13 07:40:20,269 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 24 treesize of output 20 [2021-10-13 07:40:20,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:40:20,631 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 29 treesize of output 28 [2021-10-13 07:40:20,734 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 07:40:20,741 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 50 treesize of output 49 [2021-10-13 07:40:21,135 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 73 treesize of output 65 [2021-10-13 07:40:21,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:40:21,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 43 [2021-10-13 07:40:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:40:22,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:40:22,364 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 114 treesize of output 110 [2021-10-13 07:40:34,811 INFO L354 Elim1Store]: treesize reduction 196, result has 54.3 percent of original size [2021-10-13 07:40:34,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 18486 treesize of output 17746 [2021-10-13 07:40:35,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:40:35,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990124704] [2021-10-13 07:40:35,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:35,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:40:35,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:40:35,333 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:40:35,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 07:40:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:36,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 07:40:36,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:40:36,694 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-10-13 07:40:36,694 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 37 [2021-10-13 07:40:36,882 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:40:36,882 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 13 treesize of output 13 [2021-10-13 07:40:38,331 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 22 treesize of output 18 [2021-10-13 07:40:38,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:40:38,457 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 26 [2021-10-13 07:40:38,521 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 31 treesize of output 30 [2021-10-13 07:40:38,534 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 07:40:38,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2021-10-13 07:40:38,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:40:38,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-10-13 07:40:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:40:38,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:40:38,832 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 112 treesize of output 108 [2021-10-13 07:40:41,427 INFO L354 Elim1Store]: treesize reduction 196, result has 54.3 percent of original size [2021-10-13 07:40:41,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 12084 treesize of output 11872 [2021-10-13 07:40:41,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:40:41,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:40:41,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 07:40:41,810 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 07:40:41,811 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 07:40:41,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION [2021-10-13 07:40:41,820 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-10-13 07:40:41,821 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-10-13 07:40:41,821 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-10-13 07:40:41,821 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-10-13 07:40:41,821 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 07:40:41,821 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 07:40:41,822 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 07:40:41,822 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 07:40:41,822 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 07:40:41,822 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 07:40:41,822 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 07:40:41,823 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 07:40:41,823 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-13 07:40:41,823 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-13 07:40:41,823 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-13 07:40:41,823 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-13 07:40:41,824 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-13 07:40:41,824 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-13 07:40:41,824 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-10-13 07:40:41,824 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-10-13 07:40:41,824 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION [2021-10-13 07:40:41,825 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION [2021-10-13 07:40:41,825 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION [2021-10-13 07:40:41,825 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION [2021-10-13 07:40:41,825 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION [2021-10-13 07:40:41,825 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION [2021-10-13 07:40:41,826 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION [2021-10-13 07:40:41,826 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION [2021-10-13 07:40:41,826 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION [2021-10-13 07:40:41,826 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATION [2021-10-13 07:40:41,826 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION [2021-10-13 07:40:41,827 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:40:41,827 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:40:41,827 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:40:41,827 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:40:41,828 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:40:41,828 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:40:41,828 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATION [2021-10-13 07:40:41,828 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39REQUIRES_VIOLATION [2021-10-13 07:40:41,828 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:40:41,829 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:40:41,829 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:40:41,829 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr43REQUIRES_VIOLATION [2021-10-13 07:40:41,829 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr44REQUIRES_VIOLATION [2021-10-13 07:40:41,829 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr45REQUIRES_VIOLATION [2021-10-13 07:40:41,830 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr46REQUIRES_VIOLATION [2021-10-13 07:40:41,830 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:40:41,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 07:40:42,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-10-13 07:40:42,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-13 07:40:42,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:40:42,453 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:40:42,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:40:42 BoogieIcfgContainer [2021-10-13 07:40:42,489 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:40:42,490 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:40:42,490 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:40:42,490 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:40:42,491 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:38:12" (3/4) ... [2021-10-13 07:40:42,501 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:40:42,501 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:40:42,502 INFO L168 Benchmark]: Toolchain (without parser) took 152076.73 ms. Allocated memory was 60.8 MB in the beginning and 218.1 MB in the end (delta: 157.3 MB). Free memory was 39.1 MB in the beginning and 112.0 MB in the end (delta: -73.0 MB). Peak memory consumption was 84.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:40:42,502 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 60.8 MB. Free memory is still 41.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:40:42,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 568.37 ms. Allocated memory is still 60.8 MB. Free memory was 38.8 MB in the beginning and 33.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:40:42,505 INFO L168 Benchmark]: Boogie Procedure Inliner took 76.12 ms. Allocated memory is still 60.8 MB. Free memory was 32.8 MB in the beginning and 30.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:40:42,506 INFO L168 Benchmark]: Boogie Preprocessor took 62.37 ms. Allocated memory is still 60.8 MB. Free memory was 30.5 MB in the beginning and 28.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:40:42,506 INFO L168 Benchmark]: RCFGBuilder took 891.29 ms. Allocated memory was 60.8 MB in the beginning and 81.8 MB in the end (delta: 21.0 MB). Free memory was 28.4 MB in the beginning and 46.1 MB in the end (delta: -17.7 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:40:42,507 INFO L168 Benchmark]: TraceAbstraction took 150458.79 ms. Allocated memory was 81.8 MB in the beginning and 218.1 MB in the end (delta: 136.3 MB). Free memory was 45.8 MB in the beginning and 113.1 MB in the end (delta: -67.3 MB). Peak memory consumption was 140.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:40:42,507 INFO L168 Benchmark]: Witness Printer took 11.25 ms. Allocated memory is still 218.1 MB. Free memory was 113.1 MB in the beginning and 112.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:40:42,511 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 60.8 MB. Free memory is still 41.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 568.37 ms. Allocated memory is still 60.8 MB. Free memory was 38.8 MB in the beginning and 33.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 76.12 ms. Allocated memory is still 60.8 MB. Free memory was 32.8 MB in the beginning and 30.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 62.37 ms. Allocated memory is still 60.8 MB. Free memory was 30.5 MB in the beginning and 28.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 891.29 ms. Allocated memory was 60.8 MB in the beginning and 81.8 MB in the end (delta: 21.0 MB). Free memory was 28.4 MB in the beginning and 46.1 MB in the end (delta: -17.7 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 150458.79 ms. Allocated memory was 81.8 MB in the beginning and 218.1 MB in the end (delta: 136.3 MB). Free memory was 45.8 MB in the beginning and 113.1 MB in the end (delta: -67.3 MB). Peak memory consumption was 140.1 MB. Max. memory is 16.1 GB. * Witness Printer took 11.25 ms. Allocated memory is still 218.1 MB. Free memory was 113.1 MB in the beginning and 112.0 MB in the end (delta: 1.0 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: 667]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L687] static struct L1 *list; [L641] void *ptr = malloc(nmemb * size); [L642] return memset(ptr, 0, nmemb * size); [L676] struct L1 *item = calloc_model(1U, sizeof *item); [L677] COND FALSE !(!item) [L641] void *ptr = malloc(nmemb * size); [L642] return memset(ptr, 0, nmemb * size); [L655] struct L2 *item = calloc_model(1U, sizeof *item); [L656] COND FALSE !(!item) [L658] item->proto = malloc(119U) [L659] EXPR item->proto [L659] COND FALSE !(!item->proto) [L661] EXPR \read(**list) [L661] item->next = *list [L662] *list = item [L681] COND FALSE !(__VERIFIER_nondet_int()) [L682] EXPR \read(**list) [L682] item->next = *list [L683] *list = item [L690] COND FALSE !(__VERIFIER_nondet_int()) [L692] EXPR \read(*list) [L692] EXPR list->next [L692] struct L1 *next = list->next; [L693] EXPR \read(*list) [L693] list->l2 [L667] list->next - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 658]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 658]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 659]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 659]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 661]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 661]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 661]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 661]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 662]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 662]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 682]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 682]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 682]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 682]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 683]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 683]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 692]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 692]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 692]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 692]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 667]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 668]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 668]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 668]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 668]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 668]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 669]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 669]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 669]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 697]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 697]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 685]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 106 locations, 48 error locations. Started 1 CEGAR loops. OverallTime: 150341.7ms, OverallIterations: 16, TraceHistogramMax: 8, EmptinessCheckTime: 26.9ms, AutomataDifference: 25955.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 976 SDtfs, 5364 SDslu, 3409 SDs, 0 SdLazy, 3141 SolverSat, 307 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 18617.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1346 GetRequests, 1119 SyntacticMatches, 9 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 39080.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred in iteration=7, InterpolantAutomatonStates: 137, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 148.9ms AutomataMinimizationTime, 15 MinimizatonAttempts, 605 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 321.3ms SsaConstructionTime, 3027.5ms SatisfiabilityAnalysisTime, 59966.8ms InterpolantComputationTime, 655 NumberOfCodeBlocks, 627 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1268 ConstructedInterpolants, 218 QuantifiedInterpolants, 14155 SizeOfPredicates, 197 NumberOfNonLiveVariables, 3210 ConjunctsInSsa, 245 ConjunctsInUnsatCore, 42 InterpolantComputations, 26 PerfectInterpolantSequences, 1404/1560 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 07:40:42,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6317390c-5f75-4be8-ba2b-5352ea9a7dea/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...