./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-data/running_example.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/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_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-data/running_example.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9f2ba794705756c5490886c819c60d701b0c664a ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/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_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-data/running_example.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9f2ba794705756c5490886c819c60d701b0c664a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 08:16:00,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:16:00,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:16:00,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:16:00,796 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:16:00,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:16:00,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:16:00,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:16:00,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:16:00,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:16:00,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:16:00,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:16:00,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:16:00,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:16:00,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:16:00,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:16:00,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:16:00,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:16:00,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:16:00,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:16:00,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:16:00,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:16:00,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:16:00,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:16:00,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:16:00,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:16:00,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:16:00,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:16:00,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:16:00,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:16:00,871 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:16:00,872 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:16:00,875 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:16:00,876 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:16:00,878 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:16:00,878 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:16:00,879 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:16:00,879 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:16:00,879 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:16:00,880 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:16:00,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:16:00,882 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 08:16:00,936 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:16:00,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:16:00,937 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:16:00,938 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:16:00,938 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:16:00,938 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:16:00,938 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:16:00,938 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:16:00,939 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:16:00,939 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:16:00,939 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:16:00,939 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:16:00,940 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:16:00,941 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:16:00,942 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:16:00,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:16:00,943 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:16:00,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:16:00,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:16:00,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:16:00,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:16:00,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:16:00,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:16:00,945 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:16:00,945 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:16:00,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:16:00,945 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:16:00,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:16:00,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:16:00,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:16:00,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:16:00,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:16:00,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:16:00,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:16:00,948 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:16:00,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:16:00,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:16:00,949 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:16:00,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:16:00,950 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_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f2ba794705756c5490886c819c60d701b0c664a [2021-10-13 08:16:01,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:16:01,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:16:01,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:16:01,301 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:16:01,302 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:16:01,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/heap-data/running_example.i [2021-10-13 08:16:01,380 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/data/24060265f/cb14918ecd6c4af08267bb17424dec0f/FLAG7ea245309 [2021-10-13 08:16:01,978 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:16:01,979 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/sv-benchmarks/c/heap-data/running_example.i [2021-10-13 08:16:02,002 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/data/24060265f/cb14918ecd6c4af08267bb17424dec0f/FLAG7ea245309 [2021-10-13 08:16:02,232 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/data/24060265f/cb14918ecd6c4af08267bb17424dec0f [2021-10-13 08:16:02,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:16:02,238 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:16:02,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:16:02,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:16:02,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:16:02,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:16:02" (1/1) ... [2021-10-13 08:16:02,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10b02de6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:02, skipping insertion in model container [2021-10-13 08:16:02,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:16:02" (1/1) ... [2021-10-13 08:16:02,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:16:02,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:16:02,668 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2021-10-13 08:16:02,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:16:02,690 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:16:02,760 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2021-10-13 08:16:02,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:16:02,790 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:16:02,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:02 WrapperNode [2021-10-13 08:16:02,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:16:02,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:16:02,792 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:16:02,792 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:16:02,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:02" (1/1) ... [2021-10-13 08:16:02,829 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:02" (1/1) ... [2021-10-13 08:16:02,863 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:16:02,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:16:02,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:16:02,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:16:02,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:02" (1/1) ... [2021-10-13 08:16:02,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:02" (1/1) ... [2021-10-13 08:16:02,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:02" (1/1) ... [2021-10-13 08:16:02,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:02" (1/1) ... [2021-10-13 08:16:02,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:02" (1/1) ... [2021-10-13 08:16:02,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:02" (1/1) ... [2021-10-13 08:16:02,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:02" (1/1) ... [2021-10-13 08:16:02,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:16:02,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:16:02,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:16:02,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:16:02,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:02" (1/1) ... [2021-10-13 08:16:02,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:16:02,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:16:02,938 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:16:02,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:16:02,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 08:16:02,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 08:16:02,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 08:16:02,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 08:16:02,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:16:02,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 08:16:02,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:16:02,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:16:02,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:16:03,398 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:16:03,398 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 08:16:03,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:16:03 BoogieIcfgContainer [2021-10-13 08:16:03,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:16:03,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:16:03,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:16:03,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:16:03,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:16:02" (1/3) ... [2021-10-13 08:16:03,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f399967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:16:03, skipping insertion in model container [2021-10-13 08:16:03,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:02" (2/3) ... [2021-10-13 08:16:03,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f399967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:16:03, skipping insertion in model container [2021-10-13 08:16:03,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:16:03" (3/3) ... [2021-10-13 08:16:03,416 INFO L111 eAbstractionObserver]: Analyzing ICFG running_example.i [2021-10-13 08:16:03,424 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:16:03,424 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:16:03,483 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:16:03,492 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 08:16:03,492 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:16:03,506 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 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 08:16:03,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 08:16:03,512 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:03,513 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 08:16:03,514 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:16:03,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:03,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1470856896, now seen corresponding path program 1 times [2021-10-13 08:16:03,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:16:03,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748190529] [2021-10-13 08:16:03,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:03,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:16:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:03,791 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:16:03,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748190529] [2021-10-13 08:16:03,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748190529] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:03,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:03,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:16:03,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809920701] [2021-10-13 08:16:03,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:16:03,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:16:03,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:16:03,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:16:03,823 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:03,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:03,836 INFO L93 Difference]: Finished difference Result 18 states and 26 transitions. [2021-10-13 08:16:03,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:16:03,838 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 08:16:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:03,845 INFO L225 Difference]: With dead ends: 18 [2021-10-13 08:16:03,846 INFO L226 Difference]: Without dead ends: 11 [2021-10-13 08:16:03,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:16:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-13 08:16:03,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-13 08:16:03,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:03,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-10-13 08:16:03,878 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2021-10-13 08:16:03,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:03,878 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-10-13 08:16:03,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:03,879 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2021-10-13 08:16:03,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:16:03,879 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:03,880 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:03,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:16:03,880 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:16:03,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:03,883 INFO L82 PathProgramCache]: Analyzing trace with hash 237321750, now seen corresponding path program 1 times [2021-10-13 08:16:03,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:16:03,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148595042] [2021-10-13 08:16:03,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:03,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:16:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:03,995 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:16:03,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148595042] [2021-10-13 08:16:03,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148595042] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:03,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:03,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 08:16:03,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260445541] [2021-10-13 08:16:03,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:16:03,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:16:03,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:16:03,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:16:03,999 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:04,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:04,069 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2021-10-13 08:16:04,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:16:04,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) 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 8 [2021-10-13 08:16:04,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:04,071 INFO L225 Difference]: With dead ends: 22 [2021-10-13 08:16:04,071 INFO L226 Difference]: Without dead ends: 20 [2021-10-13 08:16:04,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:16:04,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-13 08:16:04,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-10-13 08:16:04,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:04,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-10-13 08:16:04,077 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 8 [2021-10-13 08:16:04,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:04,077 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-10-13 08:16:04,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:04,078 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-10-13 08:16:04,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 08:16:04,078 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:04,078 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:04,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 08:16:04,079 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:16:04,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:04,080 INFO L82 PathProgramCache]: Analyzing trace with hash 540596448, now seen corresponding path program 1 times [2021-10-13 08:16:04,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:16:04,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11856006] [2021-10-13 08:16:04,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:04,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:16:04,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:04,313 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:16:04,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11856006] [2021-10-13 08:16:04,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11856006] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:16:04,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498015868] [2021-10-13 08:16:04,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:04,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:16:04,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:16:04,324 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:16:04,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:16:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:04,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 08:16:04,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:04,502 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 08:16:04,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:16:04,546 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 20 treesize of output 9 [2021-10-13 08:16:04,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:16:04,568 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 20 treesize of output 9 [2021-10-13 08:16:04,999 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:05,006 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-10-13 08:16:05,023 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 54 treesize of output 50 [2021-10-13 08:16:05,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 47 treesize of output 43 [2021-10-13 08:16:05,052 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:05,056 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-10-13 08:16:05,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-10-13 08:16:05,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 treesize of output 10 [2021-10-13 08:16:05,087 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 08:16:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:05,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:05,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-13 08:16:05,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1835832247] [2021-10-13 08:16:05,264 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-13 08:16:05,265 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:16:05,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:16:05,280 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:16:05,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:16:05,324 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:05,325 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:16:05,326 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:05,327 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 08:16:05,327 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:16:05,328 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:05,328 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 08:16:05,332 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:16:05,333 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:05,334 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 08:16:05,334 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:16:05,335 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:05,335 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 08:16:05,338 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:16:05,339 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:05,340 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:16:05,341 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:05,342 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-10-13 08:16:05,342 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 08:16:05,343 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:16:05,344 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:05,345 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:16:05,345 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:05,346 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-10-13 08:16:05,347 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-10-13 08:16:05,347 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:16:05,348 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:05,349 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-10-13 08:16:05,352 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 199 [2021-10-13 08:16:05,362 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@41baa092 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:571) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.doElimAllRec(ElimStorePlain.java:444) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:242) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:402) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:228) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 08:16:05,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 08:16:05,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-13 08:16:05,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890927798] [2021-10-13 08:16:05,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:16:05,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:16:05,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:16:05,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:16:05,379 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:16:05,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:05,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:16:05,580 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@41baa092 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:864) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 08:16:05,583 INFO L168 Benchmark]: Toolchain (without parser) took 3343.83 ms. Allocated memory is still 104.9 MB. Free memory was 66.6 MB in the beginning and 51.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:16:05,584 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 104.9 MB. Free memory was 84.9 MB in the beginning and 84.9 MB in the end (delta: 59.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:16:05,584 INFO L168 Benchmark]: CACSL2BoogieTranslator took 549.31 ms. Allocated memory is still 104.9 MB. Free memory was 66.4 MB in the beginning and 73.6 MB in the end (delta: -7.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:16:05,585 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.37 ms. Allocated memory is still 104.9 MB. Free memory was 73.6 MB in the beginning and 71.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:16:05,586 INFO L168 Benchmark]: Boogie Preprocessor took 43.93 ms. Allocated memory is still 104.9 MB. Free memory was 71.6 MB in the beginning and 70.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:16:05,586 INFO L168 Benchmark]: RCFGBuilder took 492.05 ms. Allocated memory is still 104.9 MB. Free memory was 70.1 MB in the beginning and 54.8 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:16:05,587 INFO L168 Benchmark]: TraceAbstraction took 2179.29 ms. Allocated memory is still 104.9 MB. Free memory was 54.2 MB in the beginning and 51.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:16:05,591 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 104.9 MB. Free memory was 84.9 MB in the beginning and 84.9 MB in the end (delta: 59.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 549.31 ms. Allocated memory is still 104.9 MB. Free memory was 66.4 MB in the beginning and 73.6 MB in the end (delta: -7.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 71.37 ms. Allocated memory is still 104.9 MB. Free memory was 73.6 MB in the beginning and 71.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.93 ms. Allocated memory is still 104.9 MB. Free memory was 71.6 MB in the beginning and 70.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 492.05 ms. Allocated memory is still 104.9 MB. Free memory was 70.1 MB in the beginning and 54.8 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2179.29 ms. Allocated memory is still 104.9 MB. Free memory was 54.2 MB in the beginning and 51.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@41baa092 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@41baa092: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 08:16:05,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/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 08:16:08,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:16:08,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:16:08,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:16:08,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:16:08,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:16:08,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:16:08,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:16:08,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:16:08,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:16:08,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:16:08,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:16:08,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:16:08,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:16:08,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:16:08,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:16:08,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:16:08,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:16:08,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:16:08,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:16:08,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:16:08,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:16:08,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:16:08,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:16:08,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:16:08,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:16:08,135 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:16:08,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:16:08,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:16:08,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:16:08,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:16:08,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:16:08,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:16:08,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:16:08,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:16:08,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:16:08,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:16:08,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:16:08,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:16:08,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:16:08,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:16:08,157 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 08:16:08,198 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:16:08,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:16:08,199 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:16:08,200 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:16:08,200 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:16:08,200 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:16:08,200 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:16:08,201 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:16:08,201 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:16:08,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:16:08,203 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:16:08,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:16:08,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:16:08,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:16:08,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:16:08,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:16:08,205 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:16:08,205 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:16:08,205 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:16:08,206 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:16:08,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:16:08,206 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:16:08,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:16:08,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:16:08,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:16:08,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:16:08,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:16:08,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:16:08,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:16:08,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:16:08,208 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:16:08,208 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:16:08,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:16:08,209 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:16:08,210 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:16:08,210 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_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f2ba794705756c5490886c819c60d701b0c664a [2021-10-13 08:16:08,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:16:08,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:16:08,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:16:08,645 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:16:08,646 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:16:08,647 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/heap-data/running_example.i [2021-10-13 08:16:08,743 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/data/a5fa5f0d6/b5dd1b021eec49be98705924515ddbab/FLAGed089b45d [2021-10-13 08:16:09,470 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:16:09,471 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/sv-benchmarks/c/heap-data/running_example.i [2021-10-13 08:16:09,499 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/data/a5fa5f0d6/b5dd1b021eec49be98705924515ddbab/FLAGed089b45d [2021-10-13 08:16:09,729 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/data/a5fa5f0d6/b5dd1b021eec49be98705924515ddbab [2021-10-13 08:16:09,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:16:09,734 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:16:09,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:16:09,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:16:09,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:16:09,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:16:09" (1/1) ... [2021-10-13 08:16:09,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722ff3fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:09, skipping insertion in model container [2021-10-13 08:16:09,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:16:09" (1/1) ... [2021-10-13 08:16:09,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:16:09,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:16:10,305 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2021-10-13 08:16:10,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:16:10,342 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:16:10,400 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2021-10-13 08:16:10,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:16:10,455 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:16:10,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:10 WrapperNode [2021-10-13 08:16:10,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:16:10,458 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:16:10,458 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:16:10,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:16:10,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:10" (1/1) ... [2021-10-13 08:16:10,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:10" (1/1) ... [2021-10-13 08:16:10,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:16:10,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:16:10,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:16:10,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:16:10,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:10" (1/1) ... [2021-10-13 08:16:10,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:10" (1/1) ... [2021-10-13 08:16:10,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:10" (1/1) ... [2021-10-13 08:16:10,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:10" (1/1) ... [2021-10-13 08:16:10,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:10" (1/1) ... [2021-10-13 08:16:10,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:10" (1/1) ... [2021-10-13 08:16:10,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:10" (1/1) ... [2021-10-13 08:16:10,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:16:10,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:16:10,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:16:10,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:16:10,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:10" (1/1) ... [2021-10-13 08:16:10,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:16:10,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:16:10,643 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:16:10,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:16:10,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 08:16:10,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 08:16:10,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 08:16:10,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:16:10,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 08:16:10,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 08:16:10,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 08:16:10,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:16:10,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:16:11,269 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:16:11,270 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 08:16:11,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:16:11 BoogieIcfgContainer [2021-10-13 08:16:11,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:16:11,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:16:11,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:16:11,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:16:11,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:16:09" (1/3) ... [2021-10-13 08:16:11,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5cc841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:16:11, skipping insertion in model container [2021-10-13 08:16:11,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:10" (2/3) ... [2021-10-13 08:16:11,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5cc841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:16:11, skipping insertion in model container [2021-10-13 08:16:11,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:16:11" (3/3) ... [2021-10-13 08:16:11,280 INFO L111 eAbstractionObserver]: Analyzing ICFG running_example.i [2021-10-13 08:16:11,286 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:16:11,286 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:16:11,340 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:16:11,348 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 08:16:11,348 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:16:11,365 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:11,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:16:11,371 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:11,371 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:11,372 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:16:11,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:11,379 INFO L82 PathProgramCache]: Analyzing trace with hash 508893296, now seen corresponding path program 1 times [2021-10-13 08:16:11,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:11,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76537679] [2021-10-13 08:16:11,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:11,395 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:11,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:11,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:11,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:16:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:11,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 08:16:11,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:11,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:11,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:11,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76537679] [2021-10-13 08:16:11,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76537679] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:11,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:11,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:16:11,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669722951] [2021-10-13 08:16:11,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:16:11,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:11,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:16:11,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:16:11,738 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:11,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:11,756 INFO L93 Difference]: Finished difference Result 26 states and 42 transitions. [2021-10-13 08:16:11,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:16:11,758 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 8 [2021-10-13 08:16:11,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:11,767 INFO L225 Difference]: With dead ends: 26 [2021-10-13 08:16:11,768 INFO L226 Difference]: Without dead ends: 14 [2021-10-13 08:16:11,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:16:11,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-13 08:16:11,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-13 08:16:11,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:11,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2021-10-13 08:16:11,807 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 8 [2021-10-13 08:16:11,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:11,808 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2021-10-13 08:16:11,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:11,809 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2021-10-13 08:16:11,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 08:16:11,810 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:11,810 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:11,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:12,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:16:12,026 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:16:12,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:12,032 INFO L82 PathProgramCache]: Analyzing trace with hash 307872697, now seen corresponding path program 1 times [2021-10-13 08:16:12,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:12,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330753366] [2021-10-13 08:16:12,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:12,038 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:12,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:12,039 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:12,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:16:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:12,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:16:12,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:12,209 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 08:16:12,386 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 29 treesize of output 17 [2021-10-13 08:16:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:12,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:12,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:12,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330753366] [2021-10-13 08:16:12,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330753366] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:12,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:12,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-13 08:16:12,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813261062] [2021-10-13 08:16:12,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 08:16:12,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:12,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 08:16:12,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:16:12,505 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:13,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:13,164 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2021-10-13 08:16:13,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 08:16:13,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 9 [2021-10-13 08:16:13,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:13,171 INFO L225 Difference]: With dead ends: 52 [2021-10-13 08:16:13,171 INFO L226 Difference]: Without dead ends: 43 [2021-10-13 08:16:13,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-13 08:16:13,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-13 08:16:13,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2021-10-13 08:16:13,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 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 08:16:13,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 41 transitions. [2021-10-13 08:16:13,180 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 41 transitions. Word has length 9 [2021-10-13 08:16:13,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:13,180 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 41 transitions. [2021-10-13 08:16:13,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:13,181 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 41 transitions. [2021-10-13 08:16:13,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 08:16:13,181 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:13,182 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:13,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:13,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:16:13,395 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:16:13,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:13,396 INFO L82 PathProgramCache]: Analyzing trace with hash -44654956, now seen corresponding path program 1 times [2021-10-13 08:16:13,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:13,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918578795] [2021-10-13 08:16:13,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:13,397 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:13,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:13,398 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:13,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:16:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:13,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 08:16:13,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:13,534 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 08:16:13,542 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 08:16:13,689 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:13,691 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-10-13 08:16:13,698 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:13,700 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-10-13 08:16:13,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:16:13,798 INFO L354 Elim1Store]: treesize reduction 152, result has 14.6 percent of original size [2021-10-13 08:16:13,798 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 3 case distinctions, treesize of input 59 treesize of output 51 [2021-10-13 08:16:13,812 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:16:13,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-10-13 08:16:13,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-10-13 08:16:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:13,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:14,028 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:14,041 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-10-13 08:16:14,047 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:14,050 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-10-13 08:16:16,113 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_18 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_18 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_4)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_18 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_18) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_18) v_DerPreprocessor_3) v_ULTIMATE.start_main_~p~0.offset_18 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_18)))))) is different from false [2021-10-13 08:16:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-10-13 08:16:16,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:16,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918578795] [2021-10-13 08:16:16,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918578795] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:16,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [786848403] [2021-10-13 08:16:16,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:16,299 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:16:16,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:16:16,320 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:16:16,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 08:16:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:16,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 08:16:16,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:16,597 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 08:16:16,615 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 08:16:16,757 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:16,758 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-10-13 08:16:16,764 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:16,767 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-10-13 08:16:16,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:16:16,873 INFO L354 Elim1Store]: treesize reduction 152, result has 14.6 percent of original size [2021-10-13 08:16:16,873 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 3 case distinctions, treesize of input 59 treesize of output 51 [2021-10-13 08:16:16,892 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:16:16,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-10-13 08:16:16,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-10-13 08:16:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:16,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:17,054 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:17,056 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 08:16:17,062 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:17,068 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 08:16:19,122 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_21 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_21 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_21))))) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_8)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_21 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_21) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_21) v_DerPreprocessor_7) v_ULTIMATE.start_main_~p~0.offset_21 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) is different from false [2021-10-13 08:16:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-10-13 08:16:19,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [786848403] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:19,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245346475] [2021-10-13 08:16:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:19,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:16:19,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:16:19,274 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:16:19,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 08:16:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:19,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 08:16:19,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:19,418 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 08:16:19,439 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 08:16:19,560 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:19,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-10-13 08:16:19,589 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:19,592 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-13 08:16:19,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:16:19,725 INFO L354 Elim1Store]: treesize reduction 152, result has 14.6 percent of original size [2021-10-13 08:16:19,726 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 3 case distinctions, treesize of input 62 treesize of output 54 [2021-10-13 08:16:19,747 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:16:19,747 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 26 [2021-10-13 08:16:19,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-10-13 08:16:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:19,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:19,913 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:19,917 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 08:16:19,928 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:19,929 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 08:16:21,986 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.offset_24 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_24 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_12)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_24 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_24) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_24) v_DerPreprocessor_11) v_ULTIMATE.start_main_~p~0.offset_24 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_24))))))) is different from false [2021-10-13 08:16:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-10-13 08:16:22,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245346475] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:22,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:16:22,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2021-10-13 08:16:22,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33813244] [2021-10-13 08:16:22,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 08:16:22,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:22,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 08:16:22,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=42, Unknown=3, NotChecked=42, Total=110 [2021-10-13 08:16:22,131 INFO L87 Difference]: Start difference. First operand 29 states and 41 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:23,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:23,164 INFO L93 Difference]: Finished difference Result 69 states and 97 transitions. [2021-10-13 08:16:23,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 08:16:23,166 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 08:16:23,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:23,167 INFO L225 Difference]: With dead ends: 69 [2021-10-13 08:16:23,167 INFO L226 Difference]: Without dead ends: 60 [2021-10-13 08:16:23,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 6335.9ms TimeCoverageRelationStatistics Valid=82, Invalid=137, Unknown=3, NotChecked=84, Total=306 [2021-10-13 08:16:23,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-13 08:16:23,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 32. [2021-10-13 08:16:23,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 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 08:16:23,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2021-10-13 08:16:23,176 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 12 [2021-10-13 08:16:23,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:23,177 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2021-10-13 08:16:23,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:23,177 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2021-10-13 08:16:23,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 08:16:23,178 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:23,179 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:23,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:23,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:23,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-13 08:16:23,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:16:23,785 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:16:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:23,785 INFO L82 PathProgramCache]: Analyzing trace with hash -893074814, now seen corresponding path program 1 times [2021-10-13 08:16:23,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:23,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993528997] [2021-10-13 08:16:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:23,786 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:23,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:23,787 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:23,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 08:16:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:23,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:16:23,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:23,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:16:23,922 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 20 treesize of output 9 [2021-10-13 08:16:23,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:16:23,936 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 20 treesize of output 9 [2021-10-13 08:16:24,123 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 23 treesize of output 11 [2021-10-13 08:16:24,134 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 23 treesize of output 11 [2021-10-13 08:16:24,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-13 08:16:24,160 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 18 treesize of output 10 [2021-10-13 08:16:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:24,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:24,275 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:24,276 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 08:16:24,280 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:24,281 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-13 08:16:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:24,473 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:24,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993528997] [2021-10-13 08:16:24,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993528997] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:24,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1106174577] [2021-10-13 08:16:24,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:24,473 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:16:24,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:16:24,474 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:16:24,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 08:16:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:24,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:16:24,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:24,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:16:24,731 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 20 treesize of output 9 [2021-10-13 08:16:24,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:16:24,741 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 20 treesize of output 9 [2021-10-13 08:16:24,887 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 23 treesize of output 11 [2021-10-13 08:16:24,898 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 23 treesize of output 11 [2021-10-13 08:16:24,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-13 08:16:24,929 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 18 treesize of output 10 [2021-10-13 08:16:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:24,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:25,004 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:25,009 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 08:16:25,012 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:25,014 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-13 08:16:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:25,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1106174577] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:25,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817769180] [2021-10-13 08:16:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:25,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:16:25,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:16:25,170 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:16:25,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 08:16:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:25,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:16:25,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:25,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:16:25,376 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 20 treesize of output 9 [2021-10-13 08:16:25,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:16:25,391 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 20 treesize of output 9 [2021-10-13 08:16:25,564 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 23 treesize of output 11 [2021-10-13 08:16:25,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-10-13 08:16:25,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-13 08:16:25,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-13 08:16:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:25,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:25,673 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:25,674 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 08:16:25,681 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:25,682 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-13 08:16:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:25,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817769180] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:25,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:16:25,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 7 [2021-10-13 08:16:25,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101537043] [2021-10-13 08:16:25,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 08:16:25,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:25,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 08:16:25,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:16:25,854 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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 08:16:26,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:26,514 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2021-10-13 08:16:26,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:16:26,518 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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 15 [2021-10-13 08:16:26,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:26,520 INFO L225 Difference]: With dead ends: 68 [2021-10-13 08:16:26,520 INFO L226 Difference]: Without dead ends: 59 [2021-10-13 08:16:26,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:16:26,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-13 08:16:26,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2021-10-13 08:16:26,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 51 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 08:16:26,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 74 transitions. [2021-10-13 08:16:26,532 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 74 transitions. Word has length 15 [2021-10-13 08:16:26,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:26,533 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 74 transitions. [2021-10-13 08:16:26,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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 08:16:26,533 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 74 transitions. [2021-10-13 08:16:26,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 08:16:26,534 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:26,534 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:26,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:26,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:26,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:27,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:16:27,144 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:16:27,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:27,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1000926759, now seen corresponding path program 2 times [2021-10-13 08:16:27,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:27,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940622941] [2021-10-13 08:16:27,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:16:27,146 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:27,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:27,147 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:27,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 08:16:27,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:16:27,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:16:27,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 08:16:27,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:27,451 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 08:16:27,465 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 08:16:27,611 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:16:27,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-13 08:16:27,621 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:27,623 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-10-13 08:16:27,626 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:27,627 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 08:16:27,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:16:27,658 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-13 08:16:27,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2021-10-13 08:16:27,740 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:27,741 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-10-13 08:16:27,745 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:27,746 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-10-13 08:16:27,873 INFO L354 Elim1Store]: treesize reduction 93, result has 29.0 percent of original size [2021-10-13 08:16:27,873 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 2 case distinctions, treesize of input 54 treesize of output 67 [2021-10-13 08:16:28,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-10-13 08:16:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:28,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:28,199 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:28,200 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-13 08:16:28,204 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:28,205 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-13 08:16:30,255 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_24 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_39 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_24)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_39 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_39) (_ bv4 32) v_DerPreprocessor_23) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)))) is different from false [2021-10-13 08:16:30,404 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:30,406 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-10-13 08:16:30,411 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:30,412 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-10-13 08:16:32,759 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~x~0_16 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_22 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_40 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_23 (_ BitVec 32)) (v_DerPreprocessor_24 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_39 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_22))))) (bvsgt v_ULTIMATE.start_main_~x~0_16 (_ bv20 32)) (bvslt v_ULTIMATE.start_main_~x~0_16 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_26)))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_22 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_22) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_40) v_DerPreprocessor_25) v_ULTIMATE.start_main_~p~0.offset_40 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_23) v_DerPreprocessor_24))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_39 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_39) (_ bv4 32) v_DerPreprocessor_23) (_ bv0 32) v_ULTIMATE.start_main_~x~0_16))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) is different from false [2021-10-13 08:16:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-10-13 08:16:33,456 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:33,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940622941] [2021-10-13 08:16:33,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940622941] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:33,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1657899057] [2021-10-13 08:16:33,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:16:33,456 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:16:33,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:16:33,468 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:16:33,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 08:16:33,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:16:33,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473930056] [2021-10-13 08:16:33,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:16:33,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:16:33,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:16:33,750 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:16:33,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 08:16:33,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 1 [2021-10-13 08:16:34,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:16:34,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:16:34,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 08:16:34,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:34,039 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 08:16:34,054 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 08:16:34,200 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 08:16:34,201 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 08:16:34,225 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:34,226 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-10-13 08:16:34,230 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:34,231 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 08:16:34,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:16:34,273 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-13 08:16:34,273 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 1 case distinctions, treesize of input 44 treesize of output 36 [2021-10-13 08:16:34,487 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:34,489 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-10-13 08:16:34,495 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:34,497 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-10-13 08:16:34,659 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-10-13 08:16:34,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-10-13 08:16:34,698 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 08:16:34,699 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 44 treesize of output 46 [2021-10-13 08:16:34,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-10-13 08:16:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:34,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:34,889 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:34,890 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-10-13 08:16:34,893 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:34,894 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-10-13 08:16:36,940 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_32 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_43 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_43 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_32)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_43 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_43) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_43) v_DerPreprocessor_31) v_ULTIMATE.start_main_~p~0.offset_43 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_43)))))) is different from false [2021-10-13 08:16:37,039 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:37,043 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-10-13 08:16:37,047 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:37,048 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-10-13 08:16:39,266 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_29 (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_32 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_27 (_ BitVec 32)) (v_DerPreprocessor_33 (_ BitVec 32)) (v_DerPreprocessor_34 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_44 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_43 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_43 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_20 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_27))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_34)))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_27 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_27) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_44) v_DerPreprocessor_33) v_ULTIMATE.start_main_~p~0.offset_44 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_29) v_DerPreprocessor_32))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_43 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_43) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_43) v_DerPreprocessor_31) v_ULTIMATE.start_main_~p~0.offset_43 v_ULTIMATE.start_main_~x~0_20))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~tail~0.base_27 (_ bv1 1)) v_ULTIMATE.start_main_~p~0.base_43)))))))) is different from false [2021-10-13 08:16:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-10-13 08:16:39,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473930056] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:39,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2021-10-13 08:16:39,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 16 [2021-10-13 08:16:39,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953395039] [2021-10-13 08:16:39,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 08:16:39,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:39,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 08:16:39,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=99, Unknown=4, NotChecked=92, Total=240 [2021-10-13 08:16:39,710 INFO L87 Difference]: Start difference. First operand 52 states and 74 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 08:16:42,165 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)))) (and (not (= c_ULTIMATE.start_main_~list~0.base c_ULTIMATE.start_main_~tail~0.base)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~tail~0.base))))) (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_24 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_39 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_24)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_39 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_39) (_ bv4 32) v_DerPreprocessor_23) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)))) (not (bvslt .cse1 (_ bv10 32))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (not (bvsgt .cse1 (_ bv20 32))) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_32 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_43 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_43 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_32)))) (store .cse2 v_ULTIMATE.start_main_~p~0.base_43 (store (store (select .cse2 v_ULTIMATE.start_main_~p~0.base_43) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_43) v_DerPreprocessor_31) v_ULTIMATE.start_main_~p~0.offset_43 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_43)))))) (exists ((v_arrayElimCell_32 (_ BitVec 1))) (let ((.cse3 (bvneg v_arrayElimCell_32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg .cse3)) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse3 (select |c_#valid| c_ULTIMATE.start_main_~list~0.base)))))))) is different from false [2021-10-13 08:16:44,261 WARN L838 $PredicateComparison]: unable to prove that (and (not (= c_ULTIMATE.start_main_~list~0.base c_ULTIMATE.start_main_~tail~0.base)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~tail~0.base))))) (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_24 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_39 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_24)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_39 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_39) (_ bv4 32) v_DerPreprocessor_23) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)))) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_32 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_43 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_43 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_32)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_43 (store (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_43) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_43) v_DerPreprocessor_31) v_ULTIMATE.start_main_~p~0.offset_43 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_43)))))) (exists ((v_arrayElimCell_32 (_ BitVec 1))) (let ((.cse2 (bvneg v_arrayElimCell_32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg .cse2)) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse2 (select |c_#valid| c_ULTIMATE.start_main_~list~0.base))))))) is different from false [2021-10-13 08:16:45,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:45,338 INFO L93 Difference]: Finished difference Result 144 states and 206 transitions. [2021-10-13 08:16:45,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 08:16:45,340 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 15 [2021-10-13 08:16:45,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:45,342 INFO L225 Difference]: With dead ends: 144 [2021-10-13 08:16:45,342 INFO L226 Difference]: Without dead ends: 127 [2021-10-13 08:16:45,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 12737.2ms TimeCoverageRelationStatistics Valid=129, Invalid=269, Unknown=6, NotChecked=246, Total=650 [2021-10-13 08:16:45,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-13 08:16:45,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 75. [2021-10-13 08:16:45,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.4594594594594594) internal successors, (108), 74 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 08:16:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 108 transitions. [2021-10-13 08:16:45,358 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 108 transitions. Word has length 15 [2021-10-13 08:16:45,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:45,358 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 108 transitions. [2021-10-13 08:16:45,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 08:16:45,358 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 108 transitions. [2021-10-13 08:16:45,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 08:16:45,359 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:45,360 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:45,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:45,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:45,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:16:45,760 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:16:45,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:45,761 INFO L82 PathProgramCache]: Analyzing trace with hash -128474150, now seen corresponding path program 1 times [2021-10-13 08:16:45,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:45,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209056980] [2021-10-13 08:16:45,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:45,761 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:45,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:45,775 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:45,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 08:16:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:45,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:16:45,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:45,961 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 08:16:46,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 08:16:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:16:46,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:16:46,164 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:46,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209056980] [2021-10-13 08:16:46,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209056980] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:46,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:46,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 08:16:46,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124841476] [2021-10-13 08:16:46,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:16:46,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:46,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:16:46,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:16:46,166 INFO L87 Difference]: Start difference. First operand 75 states and 108 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:46,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:46,861 INFO L93 Difference]: Finished difference Result 87 states and 123 transitions. [2021-10-13 08:16:46,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:16:46,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 08:16:46,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:46,864 INFO L225 Difference]: With dead ends: 87 [2021-10-13 08:16:46,864 INFO L226 Difference]: Without dead ends: 77 [2021-10-13 08:16:46,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-10-13 08:16:46,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-13 08:16:46,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-10-13 08:16:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 74 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 08:16:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2021-10-13 08:16:46,879 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 17 [2021-10-13 08:16:46,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:46,879 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2021-10-13 08:16:46,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:46,880 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2021-10-13 08:16:46,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 08:16:46,881 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:46,881 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:46,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:47,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:16:47,088 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:16:47,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:47,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1524987734, now seen corresponding path program 1 times [2021-10-13 08:16:47,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:47,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765855466] [2021-10-13 08:16:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:47,090 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:47,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:47,090 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:47,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 08:16:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:47,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 08:16:47,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:47,420 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 08:16:47,437 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 08:16:47,569 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:16:47,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-13 08:16:47,579 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:47,580 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-10-13 08:16:47,583 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:47,584 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 08:16:47,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:16:47,610 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-13 08:16:47,610 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 1 case distinctions, treesize of input 44 treesize of output 36 [2021-10-13 08:16:47,719 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:47,721 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-10-13 08:16:47,724 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:47,725 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-10-13 08:16:47,880 INFO L354 Elim1Store]: treesize reduction 93, result has 29.0 percent of original size [2021-10-13 08:16:47,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 67 [2021-10-13 08:16:48,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-10-13 08:16:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:16:48,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:48,155 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:48,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-13 08:16:48,159 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:48,160 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-13 08:16:50,211 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_51 (_ BitVec 32)) (v_DerPreprocessor_40 (_ BitVec 32)) (v_DerPreprocessor_39 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_40)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_51 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_51) (_ bv4 32) v_DerPreprocessor_39) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) is different from false [2021-10-13 08:16:50,420 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:50,420 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-10-13 08:16:50,423 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:50,424 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-13 08:16:52,632 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~x~0_26 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_33 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_51 (_ BitVec 32)) (v_DerPreprocessor_42 (_ BitVec 32)) (v_DerPreprocessor_40 (_ BitVec 32)) (v_DerPreprocessor_41 (_ BitVec 32)) (v_DerPreprocessor_39 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_36 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_52 (_ BitVec 32))) (or (bvslt v_ULTIMATE.start_main_~x~0_26 (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_33)))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_42)))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_33 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_33) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_52) v_DerPreprocessor_41) v_ULTIMATE.start_main_~p~0.offset_52 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_36) v_DerPreprocessor_40))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_51 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_51) (_ bv4 32) v_DerPreprocessor_39) (_ bv0 32) v_ULTIMATE.start_main_~x~0_26))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (bvsgt v_ULTIMATE.start_main_~x~0_26 (_ bv20 32)))) is different from false [2021-10-13 08:16:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2021-10-13 08:16:53,130 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:53,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765855466] [2021-10-13 08:16:53,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765855466] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:53,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1513958927] [2021-10-13 08:16:53,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:53,131 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:16:53,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:16:53,131 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:16:53,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-13 08:16:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:53,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 08:16:53,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:53,529 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 08:16:53,542 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 08:16:53,642 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:16:53,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-10-13 08:16:53,660 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:53,663 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-10-13 08:16:53,666 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:53,667 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 08:16:53,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:16:53,712 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-13 08:16:53,712 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 1 case distinctions, treesize of input 44 treesize of output 36 [2021-10-13 08:16:53,830 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:53,832 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-10-13 08:16:53,836 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:53,837 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-10-13 08:16:53,967 INFO L354 Elim1Store]: treesize reduction 93, result has 29.0 percent of original size [2021-10-13 08:16:53,968 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 2 case distinctions, treesize of input 54 treesize of output 67 [2021-10-13 08:16:54,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-10-13 08:16:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:16:54,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:54,211 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:54,212 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-13 08:16:54,215 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:54,216 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-13 08:16:56,278 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_47 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_DerPreprocessor_48 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_55 (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_48)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_55 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_55) (_ bv4 32) v_DerPreprocessor_47) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) is different from false [2021-10-13 08:16:56,540 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:56,546 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-10-13 08:16:56,550 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:56,551 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-13 08:16:58,867 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_50 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_56 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_42 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_38 (_ BitVec 32)) (v_DerPreprocessor_47 (_ BitVec 32)) (v_DerPreprocessor_48 (_ BitVec 32)) (v_DerPreprocessor_49 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_55 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_31 (_ BitVec 32))) (or (bvsgt v_ULTIMATE.start_main_~x~0_31 (_ bv20 32)) (bvslt v_ULTIMATE.start_main_~x~0_31 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_50)))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_38 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_38) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_56) v_DerPreprocessor_49) v_ULTIMATE.start_main_~p~0.offset_56 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_42) v_DerPreprocessor_48))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_55 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_55) (_ bv4 32) v_DerPreprocessor_47) (_ bv0 32) v_ULTIMATE.start_main_~x~0_31))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_38)))))))) is different from false [2021-10-13 08:16:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2021-10-13 08:16:59,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1513958927] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:59,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219908942] [2021-10-13 08:16:59,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:59,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:16:59,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:16:59,492 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:16:59,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 08:16:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:59,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 08:16:59,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:59,814 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 08:16:59,824 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 08:16:59,930 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 08:16:59,930 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 24 treesize of output 31 [2021-10-13 08:16:59,948 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:59,949 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-10-13 08:16:59,952 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:59,953 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 08:16:59,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:16:59,981 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-13 08:16:59,981 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 1 case distinctions, treesize of input 44 treesize of output 36 [2021-10-13 08:17:00,215 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:00,216 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-10-13 08:17:00,221 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:00,222 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-13 08:17:00,335 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-10-13 08:17:00,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 70 [2021-10-13 08:17:00,363 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 08:17:00,364 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 42 treesize of output 44 [2021-10-13 08:17:00,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-10-13 08:17:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:17:00,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:00,580 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:00,581 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-10-13 08:17:00,585 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:00,586 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-10-13 08:17:02,642 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.offset_59 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_55 (_ BitVec 32)) (v_DerPreprocessor_56 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_59 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_56)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_59 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_59) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_59) v_DerPreprocessor_55) v_ULTIMATE.start_main_~p~0.offset_59 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_59)))))) is different from false [2021-10-13 08:17:02,806 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:02,808 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-13 08:17:02,813 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:02,814 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-13 08:17:05,023 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.offset_59 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_43 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_36 (_ BitVec 32)) (v_DerPreprocessor_57 (_ BitVec 32)) (v_DerPreprocessor_58 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_60 (_ BitVec 32)) (v_DerPreprocessor_55 (_ BitVec 32)) (v_DerPreprocessor_56 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_59 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_48 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~tail~0.base_43 (_ bv1 1)) v_ULTIMATE.start_main_~p~0.base_59)))))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_43)))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_58)))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_43 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_43) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_60) v_DerPreprocessor_57) v_ULTIMATE.start_main_~p~0.offset_60 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_48) v_DerPreprocessor_56))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_59 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_59) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_59) v_DerPreprocessor_55) v_ULTIMATE.start_main_~p~0.offset_59 v_ULTIMATE.start_main_~x~0_36))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) is different from false [2021-10-13 08:17:05,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2021-10-13 08:17:05,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219908942] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:17:05,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:17:05,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 18 [2021-10-13 08:17:05,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527833677] [2021-10-13 08:17:05,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 08:17:05,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:17:05,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 08:17:05,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=101, Unknown=6, NotChecked=150, Total=306 [2021-10-13 08:17:05,350 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:17:07,756 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)))) (and (not (= c_ULTIMATE.start_main_~list~0.base c_ULTIMATE.start_main_~tail~0.base)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~tail~0.base))))) (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (exists ((v_arrayElimCell_51 (_ BitVec 1))) (let ((.cse0 (bvneg v_arrayElimCell_51))) (and (= (_ bv0 1) (bvadd (bvneg .cse0) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse0 (select |c_#valid| c_ULTIMATE.start_main_~list~0.base)))))) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_51 (_ BitVec 32)) (v_DerPreprocessor_40 (_ BitVec 32)) (v_DerPreprocessor_39 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)) (bvsge (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_40)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_51 (store (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_51) (_ bv4 32) v_DerPreprocessor_39) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) (not (bvslt .cse2 (_ bv10 32))) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_47 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_DerPreprocessor_48 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_55 (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)) (bvsge (select (select (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_48)))) (store .cse3 v_ULTIMATE.start_main_~p~0.base_55 (store (store (select .cse3 v_ULTIMATE.start_main_~p~0.base_55) (_ bv4 32) v_DerPreprocessor_47) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) (forall ((v_ULTIMATE.start_main_~p~0.offset_59 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_55 (_ BitVec 32)) (v_DerPreprocessor_56 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_59 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvsge (select (select (let ((.cse4 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_56)))) (store .cse4 v_ULTIMATE.start_main_~p~0.base_59 (store (store (select .cse4 v_ULTIMATE.start_main_~p~0.base_59) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_59) v_DerPreprocessor_55) v_ULTIMATE.start_main_~p~0.offset_59 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_59)))))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (not (bvsgt .cse2 (_ bv20 32))))) is different from false [2021-10-13 08:17:09,816 WARN L838 $PredicateComparison]: unable to prove that (and (not (= c_ULTIMATE.start_main_~list~0.base c_ULTIMATE.start_main_~tail~0.base)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~tail~0.base))))) (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (exists ((v_arrayElimCell_51 (_ BitVec 1))) (let ((.cse0 (bvneg v_arrayElimCell_51))) (and (= (_ bv0 1) (bvadd (bvneg .cse0) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse0 (select |c_#valid| c_ULTIMATE.start_main_~list~0.base)))))) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_51 (_ BitVec 32)) (v_DerPreprocessor_40 (_ BitVec 32)) (v_DerPreprocessor_39 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)) (bvsge (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_40)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_51 (store (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_51) (_ bv4 32) v_DerPreprocessor_39) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_47 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_DerPreprocessor_48 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_55 (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)) (bvsge (select (select (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_48)))) (store .cse2 v_ULTIMATE.start_main_~p~0.base_55 (store (store (select .cse2 v_ULTIMATE.start_main_~p~0.base_55) (_ bv4 32) v_DerPreprocessor_47) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) (forall ((v_ULTIMATE.start_main_~p~0.offset_59 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_55 (_ BitVec 32)) (v_DerPreprocessor_56 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_59 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvsge (select (select (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_56)))) (store .cse3 v_ULTIMATE.start_main_~p~0.base_59 (store (store (select .cse3 v_ULTIMATE.start_main_~p~0.base_59) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_59) v_DerPreprocessor_55) v_ULTIMATE.start_main_~p~0.offset_59 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_59))))))) is different from false [2021-10-13 08:17:10,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:17:10,457 INFO L93 Difference]: Finished difference Result 155 states and 217 transitions. [2021-10-13 08:17:10,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 08:17:10,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 08:17:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:17:10,460 INFO L225 Difference]: With dead ends: 155 [2021-10-13 08:17:10,460 INFO L226 Difference]: Without dead ends: 146 [2021-10-13 08:17:10,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 16613.1ms TimeCoverageRelationStatistics Valid=133, Invalid=271, Unknown=8, NotChecked=344, Total=756 [2021-10-13 08:17:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-13 08:17:10,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 73. [2021-10-13 08:17:10,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:17:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 102 transitions. [2021-10-13 08:17:10,472 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 102 transitions. Word has length 17 [2021-10-13 08:17:10,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:17:10,472 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 102 transitions. [2021-10-13 08:17:10,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:17:10,472 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 102 transitions. [2021-10-13 08:17:10,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 08:17:10,473 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:17:10,473 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:17:10,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-13 08:17:10,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-10-13 08:17:10,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 08:17:11,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:17:11,074 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:17:11,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:17:11,074 INFO L82 PathProgramCache]: Analyzing trace with hash -668283619, now seen corresponding path program 1 times [2021-10-13 08:17:11,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:17:11,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879152737] [2021-10-13 08:17:11,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:11,075 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:17:11,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:17:11,076 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:17:11,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 08:17:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:11,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 08:17:11,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:11,436 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 08:17:11,698 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-10-13 08:17:11,698 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 2 case distinctions, treesize of input 115 treesize of output 93 [2021-10-13 08:17:11,704 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 114 treesize of output 110 [2021-10-13 08:17:11,753 INFO L354 Elim1Store]: treesize reduction 174, result has 12.6 percent of original size [2021-10-13 08:17:11,753 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 2 case distinctions, treesize of input 117 treesize of output 83 [2021-10-13 08:17:11,769 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-10-13 08:17:11,769 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 104 treesize of output 104 [2021-10-13 08:17:12,196 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-10-13 08:17:12,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 140 treesize of output 110 [2021-10-13 08:17:12,228 INFO L354 Elim1Store]: treesize reduction 87, result has 17.9 percent of original size [2021-10-13 08:17:12,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 125 treesize of output 104 [2021-10-13 08:17:12,282 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-13 08:17:12,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 84 [2021-10-13 08:17:12,334 INFO L354 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2021-10-13 08:17:12,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 66 [2021-10-13 08:17:12,342 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 08:17:12,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 32 [2021-10-13 08:17:12,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-10-13 08:17:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:12,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:12,524 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:12,530 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-10-13 08:17:12,532 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:12,533 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 08:17:12,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:12,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 351 treesize of output 350 [2021-10-13 08:17:12,866 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:12,877 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 540 [2021-10-13 08:17:15,310 INFO L354 Elim1Store]: treesize reduction 78, result has 39.1 percent of original size [2021-10-13 08:17:15,310 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 540 treesize of output 358 [2021-10-13 08:17:15,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:15,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 350 treesize of output 356 [2021-10-13 08:17:15,437 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:15,443 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 546 [2021-10-13 08:17:18,041 INFO L354 Elim1Store]: treesize reduction 78, result has 39.1 percent of original size [2021-10-13 08:17:18,041 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 546 treesize of output 364 [2021-10-13 08:17:18,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:18,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 356 treesize of output 362 [2021-10-13 08:17:18,150 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 08:17:18,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 4 [2021-10-13 08:17:18,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 4 [2021-10-13 08:17:18,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 4 [2021-10-13 08:17:19,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 4 [2021-10-13 08:17:19,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:19,279 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 17 treesize of output 21 [2021-10-13 08:17:19,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 4 [2021-10-13 08:17:19,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:19,743 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 17 treesize of output 21 [2021-10-13 08:17:19,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 4 [2021-10-13 08:17:20,926 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-13 08:17:20,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 4 [2021-10-13 08:17:21,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 4 [2021-10-13 08:17:25,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:25,361 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 110 treesize of output 122 [2021-10-13 08:17:28,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:28,271 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 147 treesize of output 167 [2021-10-13 08:17:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:29,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:17:29,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879152737] [2021-10-13 08:17:29,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879152737] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:17:29,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [439048411] [2021-10-13 08:17:29,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:29,187 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:17:29,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:17:29,189 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:17:29,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-13 08:17:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:29,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 08:17:29,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:29,693 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 08:17:29,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:17:29,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:17:29,894 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-13 08:17:29,895 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 1 case distinctions, treesize of input 111 treesize of output 89 [2021-10-13 08:17:29,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:17:29,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:17:29,920 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-13 08:17:29,921 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 1 case distinctions, treesize of input 89 treesize of output 67 [2021-10-13 08:17:29,926 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 88 treesize of output 78 [2021-10-13 08:17:29,941 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-10-13 08:17:29,941 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 85 treesize of output 85 [2021-10-13 08:17:30,513 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 08:17:30,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 100 [2021-10-13 08:17:30,542 INFO L354 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2021-10-13 08:17:30,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 81 [2021-10-13 08:17:30,550 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 08:17:30,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 55 [2021-10-13 08:17:30,601 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 08:17:30,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 51 [2021-10-13 08:17:30,608 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 08:17:30,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2021-10-13 08:17:30,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-10-13 08:17:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:30,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:30,764 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:30,765 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-10-13 08:17:30,768 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:30,768 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 08:17:31,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:31,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 654 treesize of output 623 [2021-10-13 08:17:31,050 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:31,068 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1049 [2021-10-13 08:17:31,282 INFO L354 Elim1Store]: treesize reduction 60, result has 39.4 percent of original size [2021-10-13 08:17:31,282 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 1049 treesize of output 622 [2021-10-13 08:17:31,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:31,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 614 treesize of output 604 [2021-10-13 08:17:31,477 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:31,487 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1030 [2021-10-13 08:17:31,693 INFO L354 Elim1Store]: treesize reduction 51, result has 48.5 percent of original size [2021-10-13 08:17:31,693 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 1030 treesize of output 612 [2021-10-13 08:17:31,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:31,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 604 treesize of output 594 [2021-10-13 08:17:31,831 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 08:17:32,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:32,491 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 31 treesize of output 35 [2021-10-13 08:17:32,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 4 [2021-10-13 08:17:32,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:32,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-10-13 08:17:33,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 4 [2021-10-13 08:17:33,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:33,810 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 541 treesize of output 525 [2021-10-13 08:17:33,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:33,880 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 655 treesize of output 643 [2021-10-13 08:17:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:36,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [439048411] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:17:36,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686013015] [2021-10-13 08:17:36,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:36,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:17:36,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:17:36,371 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:17:36,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 08:17:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:36,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 08:17:36,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:36,819 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 08:17:37,036 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-10-13 08:17:37,036 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 2 case distinctions, treesize of input 116 treesize of output 94 [2021-10-13 08:17:37,042 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 127 treesize of output 117 [2021-10-13 08:17:37,096 INFO L354 Elim1Store]: treesize reduction 150, result has 14.3 percent of original size [2021-10-13 08:17:37,096 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 2 case distinctions, treesize of input 124 treesize of output 90 [2021-10-13 08:17:37,113 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-10-13 08:17:37,113 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 105 treesize of output 105 [2021-10-13 08:17:37,705 INFO L354 Elim1Store]: treesize reduction 71, result has 17.4 percent of original size [2021-10-13 08:17:37,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 105 [2021-10-13 08:17:37,751 INFO L354 Elim1Store]: treesize reduction 65, result has 16.7 percent of original size [2021-10-13 08:17:37,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 83 [2021-10-13 08:17:37,801 INFO L354 Elim1Store]: treesize reduction 57, result has 16.2 percent of original size [2021-10-13 08:17:37,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 72 [2021-10-13 08:17:37,877 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-10-13 08:17:37,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 58 [2021-10-13 08:17:37,889 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 08:17:37,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 32 [2021-10-13 08:17:37,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-10-13 08:17:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:37,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:38,002 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:38,004 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-10-13 08:17:38,007 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:38,007 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 08:17:38,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:38,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 349 treesize of output 348 [2021-10-13 08:17:38,401 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:38,406 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 538 [2021-10-13 08:17:41,341 INFO L354 Elim1Store]: treesize reduction 78, result has 39.1 percent of original size [2021-10-13 08:17:41,342 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 538 treesize of output 356 [2021-10-13 08:17:41,355 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:41,358 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 538 [2021-10-13 08:17:43,267 INFO L354 Elim1Store]: treesize reduction 78, result has 39.1 percent of original size [2021-10-13 08:17:43,267 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 538 treesize of output 356 [2021-10-13 08:17:43,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:43,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 348 treesize of output 354 [2021-10-13 08:17:43,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:43,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 354 treesize of output 360 [2021-10-13 08:17:43,393 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 08:17:43,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 4 [2021-10-13 08:17:43,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 4 [2021-10-13 08:17:43,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:43,871 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 38 treesize of output 42 [2021-10-13 08:17:44,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 4 [2021-10-13 08:17:44,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:44,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-10-13 08:17:44,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 4 [2021-10-13 08:17:48,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 4 [2021-10-13 08:17:58,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:58,416 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 192 treesize of output 196 [2021-10-13 08:17:59,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:17:59,633 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 219 treesize of output 227 [2021-10-13 08:18:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:18:01,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686013015] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:18:01,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:18:01,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7, 8, 7, 8] total 19 [2021-10-13 08:18:01,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863407437] [2021-10-13 08:18:01,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 08:18:01,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:18:01,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 08:18:01,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-10-13 08:18:01,045 INFO L87 Difference]: Start difference. First operand 73 states and 102 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:18:04,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:18:04,303 INFO L93 Difference]: Finished difference Result 133 states and 185 transitions. [2021-10-13 08:18:04,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 08:18:04,304 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 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 08:18:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:18:04,305 INFO L225 Difference]: With dead ends: 133 [2021-10-13 08:18:04,305 INFO L226 Difference]: Without dead ends: 115 [2021-10-13 08:18:04,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 2014.1ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-10-13 08:18:04,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-13 08:18:04,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2021-10-13 08:18:04,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.4) internal successors, (126), 90 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:18:04,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 126 transitions. [2021-10-13 08:18:04,323 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 126 transitions. Word has length 18 [2021-10-13 08:18:04,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:18:04,324 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 126 transitions. [2021-10-13 08:18:04,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:18:04,324 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 126 transitions. [2021-10-13 08:18:04,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 08:18:04,331 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:18:04,331 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:18:04,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 08:18:04,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 08:18:04,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-10-13 08:18:04,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:18:04,932 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:18:04,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:18:04,932 INFO L82 PathProgramCache]: Analyzing trace with hash -776135564, now seen corresponding path program 3 times [2021-10-13 08:18:04,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:18:04,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167107959] [2021-10-13 08:18:04,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:18:04,933 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:18:04,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:18:04,935 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:18:04,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 08:18:05,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 08:18:05,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:18:05,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 08:18:05,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:18:05,477 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 08:18:05,492 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 08:18:05,593 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:05,594 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-10-13 08:18:05,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:05,599 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 08:18:05,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:18:05,786 INFO L354 Elim1Store]: treesize reduction 118, result has 33.7 percent of original size [2021-10-13 08:18:05,786 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 3 case distinctions, treesize of input 44 treesize of output 70 [2021-10-13 08:18:05,898 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 08:18:05,899 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 22 treesize of output 29 [2021-10-13 08:18:06,059 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:06,060 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-13 08:18:06,063 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:06,064 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-10-13 08:18:06,215 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-10-13 08:18:06,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 75 [2021-10-13 08:18:06,253 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 08:18:06,254 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 47 treesize of output 49 [2021-10-13 08:18:06,357 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:06,358 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-10-13 08:18:06,362 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:06,363 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-10-13 08:18:06,516 INFO L354 Elim1Store]: treesize reduction 93, result has 29.0 percent of original size [2021-10-13 08:18:06,517 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 2 case distinctions, treesize of input 54 treesize of output 67 [2021-10-13 08:18:06,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-10-13 08:18:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:18:06,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:18:06,775 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:06,775 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-13 08:18:06,777 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:06,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-13 08:18:08,821 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_77 (_ BitVec 32)) (v_DerPreprocessor_78 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_78 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_78)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_78 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_78) (_ bv4 32) v_DerPreprocessor_77) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)))) is different from false [2021-10-13 08:18:08,916 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:08,917 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-10-13 08:18:08,920 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:08,920 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-10-13 08:18:11,138 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_80 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_79 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_46 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_64 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_58 (_ BitVec 32)) (v_DerPreprocessor_79 (_ BitVec 32)) (v_DerPreprocessor_77 (_ BitVec 32)) (v_DerPreprocessor_78 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_78 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt v_ULTIMATE.start_main_~x~0_46 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_80)))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_58 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_58) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_79) v_DerPreprocessor_79) v_ULTIMATE.start_main_~p~0.offset_79 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_64) v_DerPreprocessor_78))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_78 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_78) (_ bv4 32) v_DerPreprocessor_77) (_ bv0 32) v_ULTIMATE.start_main_~x~0_46))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (bvsgt v_ULTIMATE.start_main_~x~0_46 (_ bv20 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_58))))))) is different from false [2021-10-13 08:18:11,621 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:11,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-10-13 08:18:11,624 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:11,625 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 234 [2021-10-13 08:18:14,402 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_79 (_ BitVec 32)) (v_DerPreprocessor_82 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_48 (_ BitVec 32)) (v_DerPreprocessor_80 (_ BitVec 32)) (v_DerPreprocessor_81 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_46 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_80 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_64 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_58 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_59 (_ BitVec 32)) (v_DerPreprocessor_79 (_ BitVec 32)) (v_DerPreprocessor_77 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_66 (_ BitVec 32)) (v_DerPreprocessor_78 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_78 (_ BitVec 32))) (or (bvslt v_ULTIMATE.start_main_~x~0_46 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_82)))) (store .cse2 v_ULTIMATE.start_main_~tail~0.base_59 (store (store (store (select .cse2 v_ULTIMATE.start_main_~tail~0.base_59) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_80) v_DerPreprocessor_81) v_ULTIMATE.start_main_~p~0.offset_80 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_66) v_DerPreprocessor_80))))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_58 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_58) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_79) v_DerPreprocessor_79) v_ULTIMATE.start_main_~p~0.offset_79 v_ULTIMATE.start_main_~x~0_48) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_64) v_DerPreprocessor_78))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_78 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_78) (_ bv4 32) v_DerPreprocessor_77) (_ bv0 32) v_ULTIMATE.start_main_~x~0_46))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~tail~0.base_59 (_ bv1 1)) v_ULTIMATE.start_main_~tail~0.base_58)))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_59)))))) (bvsgt v_ULTIMATE.start_main_~x~0_46 (_ bv20 32)))) is different from false [2021-10-13 08:18:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2021-10-13 08:18:16,124 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:18:16,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167107959] [2021-10-13 08:18:16,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167107959] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:18:16,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [905246508] [2021-10-13 08:18:16,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:18:16,125 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:18:16,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:18:16,132 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:18:16,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-10-13 08:18:16,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:18:16,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747194268] [2021-10-13 08:18:16,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:18:16,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:18:16,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:18:16,735 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:18:16,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 1 [2021-10-13 08:18:16,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 08:18:18,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 08:18:18,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:18:18,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 08:18:18,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:18:18,246 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 08:18:18,269 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 11 treesize of output 7 [2021-10-13 08:18:18,368 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:18,369 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-10-13 08:18:18,372 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:18,373 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 08:18:18,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:18:18,582 INFO L354 Elim1Store]: treesize reduction 118, result has 33.7 percent of original size [2021-10-13 08:18:18,582 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 3 case distinctions, treesize of input 44 treesize of output 70 [2021-10-13 08:18:18,670 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 08:18:18,670 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 24 treesize of output 31 [2021-10-13 08:18:18,866 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:18,867 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-10-13 08:18:18,872 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:18,873 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-10-13 08:18:19,026 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-10-13 08:18:19,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 82 [2021-10-13 08:18:19,086 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-10-13 08:18:19,086 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 5 case distinctions, treesize of input 54 treesize of output 71 [2021-10-13 08:18:19,517 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:19,521 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-10-13 08:18:19,530 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:19,532 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-10-13 08:18:19,663 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-10-13 08:18:19,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 109 [2021-10-13 08:18:19,712 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-10-13 08:18:19,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 85 [2021-10-13 08:18:19,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-10-13 08:18:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:18:19,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:18:19,948 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:19,950 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 08:18:19,952 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:19,953 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 08:18:22,006 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.base_83 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_83 (_ BitVec 32)) (v_DerPreprocessor_89 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_DerPreprocessor_90 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_83))))) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_90)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_83 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_83) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_83) v_DerPreprocessor_89) v_ULTIMATE.start_main_~p~0.offset_83 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) is different from false [2021-10-13 08:18:22,108 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:22,109 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-10-13 08:18:22,112 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:22,113 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-10-13 08:18:24,302 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_84 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_52 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_83 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_DerPreprocessor_90 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_65 (_ BitVec 32)) (v_DerPreprocessor_91 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_83 (_ BitVec 32)) (v_DerPreprocessor_92 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_73 (_ BitVec 32)) (v_DerPreprocessor_89 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_92)))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_65 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_65) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_84) v_DerPreprocessor_91) v_ULTIMATE.start_main_~p~0.offset_84 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_73) v_DerPreprocessor_90))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_83 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_83) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_83) v_DerPreprocessor_89) v_ULTIMATE.start_main_~p~0.offset_83 v_ULTIMATE.start_main_~x~0_52))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_65))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~tail~0.base_65 (_ bv1 1)) v_ULTIMATE.start_main_~p~0.base_83)))))))) is different from false [2021-10-13 08:18:24,724 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:24,725 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-10-13 08:18:24,729 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:18:24,730 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 245 [2021-10-13 08:18:27,499 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_84 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_52 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_83 (_ BitVec 32)) (v_DerPreprocessor_90 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_54 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_85 (_ BitVec 32)) (v_DerPreprocessor_93 (_ BitVec 32)) (v_DerPreprocessor_94 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_65 (_ BitVec 32)) (v_DerPreprocessor_91 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_83 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_66 (_ BitVec 32)) (v_DerPreprocessor_92 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_75 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_73 (_ BitVec 32)) (v_DerPreprocessor_89 (_ BitVec 32))) (let ((.cse3 (store |c_#valid| v_ULTIMATE.start_main_~tail~0.base_66 (_ bv1 1)))) (or (bvsge (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_94)))) (store .cse2 v_ULTIMATE.start_main_~tail~0.base_66 (store (store (store (select .cse2 v_ULTIMATE.start_main_~tail~0.base_66) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_85) v_DerPreprocessor_93) v_ULTIMATE.start_main_~p~0.offset_85 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_75) v_DerPreprocessor_92))))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_65 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_65) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_84) v_DerPreprocessor_91) v_ULTIMATE.start_main_~p~0.offset_84 v_ULTIMATE.start_main_~x~0_54) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_73) v_DerPreprocessor_90))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_83 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_83) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_83) v_DerPreprocessor_89) v_ULTIMATE.start_main_~p~0.offset_83 v_ULTIMATE.start_main_~x~0_52))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select .cse3 v_ULTIMATE.start_main_~tail~0.base_65)))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_66)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select (store .cse3 v_ULTIMATE.start_main_~tail~0.base_65 (_ bv1 1)) v_ULTIMATE.start_main_~p~0.base_83))))))))))) is different from false [2021-10-13 08:18:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2021-10-13 08:18:29,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747194268] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:18:29,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2021-10-13 08:18:29,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8] total 19 [2021-10-13 08:18:29,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111424215] [2021-10-13 08:18:29,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 08:18:29,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:18:29,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 08:18:29,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=118, Unknown=6, NotChecked=162, Total=342 [2021-10-13 08:18:29,227 INFO L87 Difference]: Start difference. First operand 91 states and 126 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:18:36,712 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)))) (and (not (= c_ULTIMATE.start_main_~list~0.base c_ULTIMATE.start_main_~tail~0.base)) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_77 (_ BitVec 32)) (v_DerPreprocessor_78 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_78 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_78)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_78 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_78) (_ bv4 32) v_DerPreprocessor_77) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~tail~0.base))))) (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (forall ((v_ULTIMATE.start_main_~p~0.base_83 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_83 (_ BitVec 32)) (v_DerPreprocessor_89 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_DerPreprocessor_90 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_83))))) (bvsge (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_90)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_83 (store (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_83) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_83) v_DerPreprocessor_89) v_ULTIMATE.start_main_~p~0.offset_83 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) (not (bvslt .cse2 (_ bv10 32))) (exists ((v_arrayElimCell_180 (_ BitVec 1)) (v_ULTIMATE.start_main_~tail~0.base_62 (_ BitVec 32))) (let ((.cse3 (bvneg v_arrayElimCell_180))) (and (not (= c_ULTIMATE.start_main_~tail~0.base v_ULTIMATE.start_main_~tail~0.base_62)) (not (= c_ULTIMATE.start_main_~list~0.base v_ULTIMATE.start_main_~tail~0.base_62)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg .cse3)))) (= (_ bv0 1) (bvadd (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_62) .cse3))))) (exists ((v_arrayElimCell_181 (_ BitVec 1)) (v_arrayElimCell_168 (_ BitVec 1))) (let ((.cse5 (bvneg (bvneg (bvneg v_arrayElimCell_168)))) (.cse4 (bvneg v_arrayElimCell_181))) (and (= (_ bv0 1) (bvadd .cse4 (select |c_#valid| c_ULTIMATE.start_main_~list~0.base))) (= (_ bv0 1) (bvadd .cse5 (_ bv1 1))) (= (_ bv0 1) (bvadd (bvneg .cse5) (bvneg (bvneg .cse4))))))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (not (bvsgt .cse2 (_ bv20 32))))) is different from false [2021-10-13 08:18:38,811 WARN L838 $PredicateComparison]: unable to prove that (and (not (= c_ULTIMATE.start_main_~list~0.base c_ULTIMATE.start_main_~tail~0.base)) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_77 (_ BitVec 32)) (v_DerPreprocessor_78 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_78 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_78)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_78 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_78) (_ bv4 32) v_DerPreprocessor_77) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~tail~0.base))))) (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (forall ((v_ULTIMATE.start_main_~p~0.base_83 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_83 (_ BitVec 32)) (v_DerPreprocessor_89 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_DerPreprocessor_90 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_83))))) (bvsge (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_90)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_83 (store (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_83) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_83) v_DerPreprocessor_89) v_ULTIMATE.start_main_~p~0.offset_83 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) (exists ((v_arrayElimCell_180 (_ BitVec 1)) (v_ULTIMATE.start_main_~tail~0.base_62 (_ BitVec 32))) (let ((.cse2 (bvneg v_arrayElimCell_180))) (and (not (= c_ULTIMATE.start_main_~tail~0.base v_ULTIMATE.start_main_~tail~0.base_62)) (not (= c_ULTIMATE.start_main_~list~0.base v_ULTIMATE.start_main_~tail~0.base_62)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg .cse2)))) (= (_ bv0 1) (bvadd (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_62) .cse2))))) (exists ((v_arrayElimCell_181 (_ BitVec 1)) (v_arrayElimCell_168 (_ BitVec 1))) (let ((.cse4 (bvneg (bvneg (bvneg v_arrayElimCell_168)))) (.cse3 (bvneg v_arrayElimCell_181))) (and (= (_ bv0 1) (bvadd .cse3 (select |c_#valid| c_ULTIMATE.start_main_~list~0.base))) (= (_ bv0 1) (bvadd .cse4 (_ bv1 1))) (= (_ bv0 1) (bvadd (bvneg .cse4) (bvneg (bvneg .cse3)))))))) is different from false [2021-10-13 08:18:41,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:18:41,196 INFO L93 Difference]: Finished difference Result 192 states and 269 transitions. [2021-10-13 08:18:41,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 08:18:41,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 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 08:18:41,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:18:41,201 INFO L225 Difference]: With dead ends: 192 [2021-10-13 08:18:41,201 INFO L226 Difference]: Without dead ends: 183 [2021-10-13 08:18:41,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 21520.6ms TimeCoverageRelationStatistics Valid=237, Invalid=488, Unknown=9, NotChecked=456, Total=1190 [2021-10-13 08:18:41,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-10-13 08:18:41,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 96. [2021-10-13 08:18:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.4210526315789473) internal successors, (135), 95 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:18:41,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2021-10-13 08:18:41,220 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 18 [2021-10-13 08:18:41,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:18:41,221 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2021-10-13 08:18:41,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:18:41,221 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2021-10-13 08:18:41,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 08:18:41,223 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:18:41,223 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:18:41,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 08:18:41,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-13 08:18:41,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:18:41,636 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:18:41,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:18:41,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1147499445, now seen corresponding path program 1 times [2021-10-13 08:18:41,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:18:41,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079594784] [2021-10-13 08:18:41,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:18:41,637 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:18:41,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:18:41,639 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:18:41,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 08:18:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:18:42,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 08:18:42,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:18:42,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 20 [2021-10-13 08:18:43,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-10-13 08:18:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:18:43,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:18:45,067 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-10-13 08:18:45,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 33 [2021-10-13 08:18:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:18:45,139 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:18:45,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079594784] [2021-10-13 08:18:45,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079594784] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:18:45,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1557712382] [2021-10-13 08:18:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:18:45,140 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:18:45,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:18:45,141 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:18:45,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-10-13 08:18:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:18:45,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 08:18:45,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:18:46,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-10-13 08:18:47,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-10-13 08:18:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:18:48,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:18:48,351 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-10-13 08:18:48,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 33 [2021-10-13 08:18:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:18:48,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1557712382] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:18:48,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527699827] [2021-10-13 08:18:48,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:18:48,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:18:48,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:18:48,418 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:18:48,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 08:18:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:18:48,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 08:18:48,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:18:49,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-10-13 08:18:49,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-10-13 08:18:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:18:49,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:18:50,304 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-10-13 08:18:50,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 33 [2021-10-13 08:18:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:18:50,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527699827] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:18:50,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:18:50,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11, 9, 10, 9] total 23 [2021-10-13 08:18:50,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133091778] [2021-10-13 08:18:50,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 08:18:50,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:18:50,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 08:18:50,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-10-13 08:18:50,359 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:18:59,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:18:59,823 INFO L93 Difference]: Finished difference Result 195 states and 270 transitions. [2021-10-13 08:18:59,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 08:18:59,830 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 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 20 [2021-10-13 08:18:59,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:18:59,831 INFO L225 Difference]: With dead ends: 195 [2021-10-13 08:18:59,832 INFO L226 Difference]: Without dead ends: 178 [2021-10-13 08:18:59,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 9561.6ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 08:18:59,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-13 08:18:59,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 113. [2021-10-13 08:18:59,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.4464285714285714) internal successors, (162), 112 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:18:59,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 162 transitions. [2021-10-13 08:18:59,848 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 162 transitions. Word has length 20 [2021-10-13 08:18:59,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:18:59,849 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 162 transitions. [2021-10-13 08:18:59,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:18:59,849 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 162 transitions. [2021-10-13 08:18:59,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 08:18:59,850 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:18:59,851 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:18:59,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 08:19:00,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-10-13 08:19:00,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-13 08:19:00,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:19:00,456 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:19:00,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:19:00,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1494005967, now seen corresponding path program 2 times [2021-10-13 08:19:00,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:19:00,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770802097] [2021-10-13 08:19:00,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:19:00,457 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:19:00,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:19:00,458 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:19:00,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 08:19:01,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:19:01,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:19:01,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 08:19:01,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:19:01,125 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 08:19:01,133 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 08:19:01,236 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:01,237 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-10-13 08:19:01,239 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:01,240 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 08:19:01,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:19:01,436 INFO L354 Elim1Store]: treesize reduction 118, result has 33.7 percent of original size [2021-10-13 08:19:01,437 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 3 case distinctions, treesize of input 44 treesize of output 70 [2021-10-13 08:19:01,503 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 08:19:01,503 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 24 treesize of output 31 [2021-10-13 08:19:01,660 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:01,661 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-13 08:19:01,665 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:01,666 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-10-13 08:19:01,799 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-10-13 08:19:01,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 81 [2021-10-13 08:19:01,832 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 08:19:01,832 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 53 treesize of output 55 [2021-10-13 08:19:01,954 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:01,955 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-10-13 08:19:02,050 INFO L354 Elim1Store]: treesize reduction 54, result has 31.6 percent of original size [2021-10-13 08:19:02,050 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 2 case distinctions, treesize of input 66 treesize of output 51 [2021-10-13 08:19:02,139 INFO L354 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2021-10-13 08:19:02,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 64 [2021-10-13 08:19:02,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-10-13 08:19:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:19:02,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:19:02,485 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:02,487 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-13 08:19:02,490 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:02,492 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-13 08:19:04,540 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.base_97 (_ BitVec 32)) (v_DerPreprocessor_100 (_ BitVec 32)) (v_DerPreprocessor_101 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_101)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_97 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_97) (_ bv4 32) v_DerPreprocessor_100) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) is different from false [2021-10-13 08:19:04,736 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:04,740 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-10-13 08:19:04,742 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:04,743 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-13 08:19:06,964 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~tail~0.offset_82 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_97 (_ BitVec 32)) (v_DerPreprocessor_100 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_59 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_101 (_ BitVec 32)) (v_DerPreprocessor_102 (_ BitVec 32)) (v_DerPreprocessor_103 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_98 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_72 (_ BitVec 32))) (or (bvslt v_ULTIMATE.start_main_~x~0_59 (_ bv10 32)) (bvsgt v_ULTIMATE.start_main_~x~0_59 (_ bv20 32)) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_103)))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_72 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_72) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_98) v_DerPreprocessor_102) v_ULTIMATE.start_main_~p~0.offset_98 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_82) v_DerPreprocessor_101))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_97 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_97) (_ bv4 32) v_DerPreprocessor_100) (_ bv0 32) v_ULTIMATE.start_main_~x~0_59))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_72)))))))) is different from false [2021-10-13 08:19:07,491 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:07,492 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-10-13 08:19:07,495 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:07,496 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 234 [2021-10-13 08:19:10,239 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_100 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_101 (_ BitVec 32)) (v_DerPreprocessor_102 (_ BitVec 32)) (v_DerPreprocessor_103 (_ BitVec 32)) (v_DerPreprocessor_104 (_ BitVec 32)) (v_DerPreprocessor_105 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_61 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_99 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_98 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_82 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_97 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_59 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_84 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_72 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_73 (_ BitVec 32))) (or (bvslt v_ULTIMATE.start_main_~x~0_59 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_105)))) (store .cse2 v_ULTIMATE.start_main_~tail~0.base_73 (store (store (store (select .cse2 v_ULTIMATE.start_main_~tail~0.base_73) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_99) v_DerPreprocessor_104) v_ULTIMATE.start_main_~p~0.offset_99 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_84) v_DerPreprocessor_103))))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_72 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_72) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_98) v_DerPreprocessor_102) v_ULTIMATE.start_main_~p~0.offset_98 v_ULTIMATE.start_main_~x~0_61) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_82) v_DerPreprocessor_101))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_97 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_97) (_ bv4 32) v_DerPreprocessor_100) (_ bv0 32) v_ULTIMATE.start_main_~x~0_59))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~tail~0.base_73 (_ bv1 1)) v_ULTIMATE.start_main_~tail~0.base_72))))))) (bvsgt v_ULTIMATE.start_main_~x~0_59 (_ bv20 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_73))))))) is different from false [2021-10-13 08:19:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 20 not checked. [2021-10-13 08:19:11,684 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:19:11,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770802097] [2021-10-13 08:19:11,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770802097] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:19:11,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1149566394] [2021-10-13 08:19:11,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:19:11,685 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:19:11,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:19:11,685 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:19:11,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-10-13 08:19:12,423 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:19:12,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074134520] [2021-10-13 08:19:12,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:19:12,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:19:12,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:19:12,425 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:19:12,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 1 [2021-10-13 08:19:12,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-13 08:19:13,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:19:13,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:19:13,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 08:19:13,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:19:13,100 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 08:19:13,109 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 08:19:13,191 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:13,192 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-10-13 08:19:13,194 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:13,195 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 08:19:13,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:19:13,392 INFO L354 Elim1Store]: treesize reduction 118, result has 33.7 percent of original size [2021-10-13 08:19:13,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 70 [2021-10-13 08:19:13,453 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 08:19:13,454 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 24 treesize of output 31 [2021-10-13 08:19:13,631 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:13,631 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-10-13 08:19:13,637 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:13,639 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-10-13 08:19:13,773 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-10-13 08:19:13,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 86 [2021-10-13 08:19:13,835 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-10-13 08:19:13,835 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 5 case distinctions, treesize of input 58 treesize of output 75 [2021-10-13 08:19:14,322 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:14,323 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-10-13 08:19:14,328 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:14,329 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-10-13 08:19:14,464 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-10-13 08:19:14,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 108 [2021-10-13 08:19:14,523 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-10-13 08:19:14,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 84 [2021-10-13 08:19:14,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-10-13 08:19:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:19:14,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:19:14,683 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:14,684 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-10-13 08:19:14,686 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:14,687 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-10-13 08:19:16,727 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_112 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_113 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_102 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_102 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_113)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_102 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_102) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_102) v_DerPreprocessor_112) v_ULTIMATE.start_main_~p~0.offset_102 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_102)))))) is different from false [2021-10-13 08:19:16,936 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:16,937 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-10-13 08:19:16,940 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:16,941 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-10-13 08:19:19,138 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.offset_103 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_112 (_ BitVec 32)) (v_DerPreprocessor_113 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_102 (_ BitVec 32)) (v_DerPreprocessor_114 (_ BitVec 32)) (v_DerPreprocessor_115 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_66 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_102 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_91 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_79 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~tail~0.base_79 (_ bv1 1)) v_ULTIMATE.start_main_~p~0.base_102))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_79)))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_115)))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_79 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_79) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_103) v_DerPreprocessor_114) v_ULTIMATE.start_main_~p~0.offset_103 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_91) v_DerPreprocessor_113))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_102 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_102) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_102) v_DerPreprocessor_112) v_ULTIMATE.start_main_~p~0.offset_102 v_ULTIMATE.start_main_~x~0_66))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) is different from false [2021-10-13 08:19:19,577 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:19,578 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 182 [2021-10-13 08:19:19,581 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:19,582 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 242 [2021-10-13 08:19:22,272 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.offset_104 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_103 (_ BitVec 32)) (v_DerPreprocessor_112 (_ BitVec 32)) (v_DerPreprocessor_113 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_102 (_ BitVec 32)) (v_DerPreprocessor_114 (_ BitVec 32)) (v_DerPreprocessor_115 (_ BitVec 32)) (v_DerPreprocessor_116 (_ BitVec 32)) (v_DerPreprocessor_117 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_66 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_102 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_93 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_68 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_91 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_79 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_80 (_ BitVec 32))) (let ((.cse0 (store |c_#valid| v_ULTIMATE.start_main_~tail~0.base_80 (_ bv1 1)))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select .cse0 v_ULTIMATE.start_main_~tail~0.base_79)))))) (bvsge (select (select (let ((.cse1 (let ((.cse2 (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_117)))) (store .cse3 v_ULTIMATE.start_main_~tail~0.base_80 (store (store (store (select .cse3 v_ULTIMATE.start_main_~tail~0.base_80) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_104) v_DerPreprocessor_116) v_ULTIMATE.start_main_~p~0.offset_104 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_93) v_DerPreprocessor_115))))) (store .cse2 v_ULTIMATE.start_main_~tail~0.base_79 (store (store (store (select .cse2 v_ULTIMATE.start_main_~tail~0.base_79) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_103) v_DerPreprocessor_114) v_ULTIMATE.start_main_~p~0.offset_103 v_ULTIMATE.start_main_~x~0_68) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_91) v_DerPreprocessor_113))))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_102 (store (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_102) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_102) v_DerPreprocessor_112) v_ULTIMATE.start_main_~p~0.offset_102 v_ULTIMATE.start_main_~x~0_66))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_80)))) (not (= (_ bv0 1) (bvneg (bvneg (select (store .cse0 v_ULTIMATE.start_main_~tail~0.base_79 (_ bv1 1)) v_ULTIMATE.start_main_~p~0.base_102)))))))) is different from false [2021-10-13 08:19:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 20 not checked. [2021-10-13 08:19:23,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074134520] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:19:23,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2021-10-13 08:19:23,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8] total 19 [2021-10-13 08:19:23,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103329259] [2021-10-13 08:19:23,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 08:19:23,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:19:23,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 08:19:23,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=118, Unknown=6, NotChecked=162, Total=342 [2021-10-13 08:19:23,954 INFO L87 Difference]: Start difference. First operand 113 states and 162 transitions. Second operand has 19 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 08:19:33,433 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)))) (and (not (= c_ULTIMATE.start_main_~list~0.base c_ULTIMATE.start_main_~tail~0.base)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~tail~0.base))))) (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (exists ((v_arrayElimCell_202 (_ BitVec 1)) (v_arrayElimCell_217 (_ BitVec 1))) (let ((.cse0 (bvneg (bvneg (bvneg (bvneg v_arrayElimCell_202))))) (.cse1 (bvneg v_arrayElimCell_217))) (and (= (_ bv0 1) (bvadd (bvneg .cse0) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse0 (bvneg (bvneg .cse1)))) (= (_ bv0 1) (bvadd .cse1 (select |c_#valid| c_ULTIMATE.start_main_~list~0.base)))))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (bvslt .cse2 (_ bv10 32))) (exists ((v_ULTIMATE.start_main_~tail~0.base_76 (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_76))))) (_ bv1 1))) (not (= c_ULTIMATE.start_main_~list~0.base v_ULTIMATE.start_main_~tail~0.base_76)) (not (= c_ULTIMATE.start_main_~tail~0.base v_ULTIMATE.start_main_~tail~0.base_76)))) (forall ((v_ULTIMATE.start_main_~p~0.base_97 (_ BitVec 32)) (v_DerPreprocessor_100 (_ BitVec 32)) (v_DerPreprocessor_101 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)) (bvsge (select (select (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_101)))) (store .cse3 v_ULTIMATE.start_main_~p~0.base_97 (store (store (select .cse3 v_ULTIMATE.start_main_~p~0.base_97) (_ bv4 32) v_DerPreprocessor_100) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (not (bvsgt .cse2 (_ bv20 32))) (forall ((v_DerPreprocessor_112 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_113 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_102 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_102 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse4 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_113)))) (store .cse4 v_ULTIMATE.start_main_~p~0.base_102 (store (store (select .cse4 v_ULTIMATE.start_main_~p~0.base_102) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_102) v_DerPreprocessor_112) v_ULTIMATE.start_main_~p~0.offset_102 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_102)))))))) is different from false [2021-10-13 08:19:35,544 WARN L838 $PredicateComparison]: unable to prove that (and (not (= c_ULTIMATE.start_main_~list~0.base c_ULTIMATE.start_main_~tail~0.base)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~tail~0.base))))) (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (exists ((v_arrayElimCell_202 (_ BitVec 1)) (v_arrayElimCell_217 (_ BitVec 1))) (let ((.cse0 (bvneg (bvneg (bvneg (bvneg v_arrayElimCell_202))))) (.cse1 (bvneg v_arrayElimCell_217))) (and (= (_ bv0 1) (bvadd (bvneg .cse0) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse0 (bvneg (bvneg .cse1)))) (= (_ bv0 1) (bvadd .cse1 (select |c_#valid| c_ULTIMATE.start_main_~list~0.base)))))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (exists ((v_ULTIMATE.start_main_~tail~0.base_76 (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_76))))) (_ bv1 1))) (not (= c_ULTIMATE.start_main_~list~0.base v_ULTIMATE.start_main_~tail~0.base_76)) (not (= c_ULTIMATE.start_main_~tail~0.base v_ULTIMATE.start_main_~tail~0.base_76)))) (forall ((v_ULTIMATE.start_main_~p~0.base_97 (_ BitVec 32)) (v_DerPreprocessor_100 (_ BitVec 32)) (v_DerPreprocessor_101 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)) (bvsge (select (select (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_101)))) (store .cse2 v_ULTIMATE.start_main_~p~0.base_97 (store (store (select .cse2 v_ULTIMATE.start_main_~p~0.base_97) (_ bv4 32) v_DerPreprocessor_100) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) (forall ((v_DerPreprocessor_112 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_113 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_102 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_102 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_113)))) (store .cse3 v_ULTIMATE.start_main_~p~0.base_102 (store (store (select .cse3 v_ULTIMATE.start_main_~p~0.base_102) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_102) v_DerPreprocessor_112) v_ULTIMATE.start_main_~p~0.offset_102 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_102))))))) is different from false [2021-10-13 08:19:37,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:19:37,372 INFO L93 Difference]: Finished difference Result 236 states and 334 transitions. [2021-10-13 08:19:37,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 08:19:37,372 INFO L78 Accepts]: Start accepts. Automaton has has 19 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 20 [2021-10-13 08:19:37,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:19:37,374 INFO L225 Difference]: With dead ends: 236 [2021-10-13 08:19:37,375 INFO L226 Difference]: Without dead ends: 204 [2021-10-13 08:19:37,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 23523.5ms TimeCoverageRelationStatistics Valid=237, Invalid=488, Unknown=9, NotChecked=456, Total=1190 [2021-10-13 08:19:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-10-13 08:19:37,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 105. [2021-10-13 08:19:37,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.4230769230769231) internal successors, (148), 104 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:19:37,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 148 transitions. [2021-10-13 08:19:37,398 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 148 transitions. Word has length 20 [2021-10-13 08:19:37,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:19:37,398 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 148 transitions. [2021-10-13 08:19:37,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 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 08:19:37,399 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 148 transitions. [2021-10-13 08:19:37,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 08:19:37,399 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:19:37,400 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:19:37,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-10-13 08:19:37,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-13 08:19:37,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:19:37,804 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:19:37,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:19:37,805 INFO L82 PathProgramCache]: Analyzing trace with hash 232192162, now seen corresponding path program 2 times [2021-10-13 08:19:37,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:19:37,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602633443] [2021-10-13 08:19:37,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:19:37,805 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:19:37,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:19:37,807 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:19:37,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-13 08:19:38,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:19:38,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:19:38,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 08:19:38,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:19:38,522 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 08:19:38,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:19:38,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:19:38,637 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-13 08:19:38,637 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 1 case distinctions, treesize of input 40 treesize of output 19 [2021-10-13 08:19:38,686 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 08:19:38,687 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 24 treesize of output 31 [2021-10-13 08:19:38,715 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 20 treesize of output 16 [2021-10-13 08:19:38,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:19:38,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 19 [2021-10-13 08:19:40,101 INFO L354 Elim1Store]: treesize reduction 307, result has 10.0 percent of original size [2021-10-13 08:19:40,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 371 treesize of output 241 [2021-10-13 08:19:40,394 INFO L354 Elim1Store]: treesize reduction 323, result has 9.0 percent of original size [2021-10-13 08:19:40,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 463 treesize of output 317 [2021-10-13 08:19:40,412 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:40,413 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 343 [2021-10-13 08:19:40,418 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:40,419 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 350 [2021-10-13 08:19:40,553 INFO L354 Elim1Store]: treesize reduction 955, result has 8.3 percent of original size [2021-10-13 08:19:40,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 350 treesize of output 302 [2021-10-13 08:19:40,592 INFO L354 Elim1Store]: treesize reduction 22, result has 69.9 percent of original size [2021-10-13 08:19:40,592 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 206 treesize of output 226 [2021-10-13 08:19:40,594 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 08:19:41,451 INFO L354 Elim1Store]: treesize reduction 71, result has 17.4 percent of original size [2021-10-13 08:19:41,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 201 treesize of output 184 [2021-10-13 08:19:41,532 INFO L354 Elim1Store]: treesize reduction 122, result has 14.7 percent of original size [2021-10-13 08:19:41,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 184 treesize of output 125 [2021-10-13 08:19:41,609 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-10-13 08:19:41,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 169 treesize of output 130 [2021-10-13 08:19:41,755 INFO L354 Elim1Store]: treesize reduction 45, result has 8.2 percent of original size [2021-10-13 08:19:41,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 97 [2021-10-13 08:19:41,772 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-13 08:19:41,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 48 [2021-10-13 08:19:41,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-10-13 08:19:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:19:41,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:19:42,034 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:42,035 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-10-13 08:19:42,037 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:42,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 08:19:42,306 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:42,307 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-10-13 08:19:42,311 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:42,312 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 228 [2021-10-13 08:19:42,317 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:42,319 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 220 [2021-10-13 08:19:42,323 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:42,324 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 212 [2021-10-13 08:19:44,775 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_121 (_ BitVec 32)) (v_DerPreprocessor_122 (_ BitVec 32)) (v_DerPreprocessor_123 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_124 (_ BitVec 32)) (v_DerPreprocessor_125 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_109 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_109 (_ BitVec 32)) (v_DerPreprocessor_120 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_109)))) (bvsge (let ((.cse3 (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_109)) (.cse4 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset)) (.cse6 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) .cse4 v_DerPreprocessor_123)))) (store .cse2 v_ULTIMATE.start_main_~p~0.base_109 (store (store (select .cse2 v_ULTIMATE.start_main_~p~0.base_109) .cse3 v_DerPreprocessor_122) v_ULTIMATE.start_main_~p~0.offset_109 ULTIMATE.start_main_~x~0))))) (store .cse0 c_ULTIMATE.start_main_~list~0.base (let ((.cse1 (select .cse0 c_ULTIMATE.start_main_~list~0.base))) (store .cse1 c_ULTIMATE.start_main_~list~0.offset (bvadd (select .cse1 c_ULTIMATE.start_main_~list~0.offset) (_ bv1 32)))))) (select (store (select (let ((.cse5 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base) .cse4 v_ULTIMATE.start_main_~p~0.base_109)))) (store .cse5 v_ULTIMATE.start_main_~p~0.base_109 (store (store (select .cse5 v_ULTIMATE.start_main_~p~0.base_109) .cse3 (_ bv0 32)) v_ULTIMATE.start_main_~p~0.offset_109 v_DerPreprocessor_124))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset v_DerPreprocessor_120) .cse6)) (select (store (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~tail~0.base) .cse4 v_ULTIMATE.start_main_~p~0.offset_109)))) (store .cse7 v_ULTIMATE.start_main_~p~0.base_109 (store (store (select .cse7 v_ULTIMATE.start_main_~p~0.base_109) .cse3 (_ bv0 32)) v_ULTIMATE.start_main_~p~0.offset_109 v_DerPreprocessor_125))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset v_DerPreprocessor_121) .cse6))) (_ bv10 32)))) is different from false [2021-10-13 08:19:46,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:19:46,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9061376 treesize of output 8954967 [2021-10-13 08:20:14,700 WARN L207 SmtUtils]: Spent 28.08 s on a formula simplification that was a NOOP. DAG size: 1092 [2021-10-13 08:20:42,254 WARN L207 SmtUtils]: Spent 27.46 s on a formula simplification that was a NOOP. DAG size: 1096 [2021-10-13 08:20:42,269 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:21:09,819 WARN L207 SmtUtils]: Spent 27.54 s on a formula simplification that was a NOOP. DAG size: 1060 [2021-10-13 08:21:36,654 WARN L207 SmtUtils]: Spent 26.83 s on a formula simplification that was a NOOP. DAG size: 1087 [2021-10-13 08:21:36,656 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10658812 [2021-10-13 08:22:04,049 WARN L207 SmtUtils]: Spent 27.33 s on a formula simplification that was a NOOP. DAG size: 1087 [2021-10-13 08:22:09,389 WARN L207 SmtUtils]: Spent 5.25 s on a formula simplification. DAG size of input: 95 DAG size of output: 48 [2021-10-13 08:22:09,389 INFO L354 Elim1Store]: treesize reduction 366, result has 19.0 percent of original size [2021-10-13 08:22:09,391 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 1 new quantified variables, introduced 5 case distinctions, treesize of input 10658812 treesize of output 8004770 [2021-10-13 08:22:37,110 WARN L207 SmtUtils]: Spent 27.72 s on a formula simplification that was a NOOP. DAG size: 1110 [2021-10-13 08:23:04,803 WARN L207 SmtUtils]: Spent 27.69 s on a formula simplification that was a NOOP. DAG size: 1099 [2021-10-13 08:23:06,396 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-10-13 08:23:06,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 9883002 treesize of output 8878380 [2021-10-13 08:23:33,862 WARN L207 SmtUtils]: Spent 27.46 s on a formula simplification that was a NOOP. DAG size: 1119 [2021-10-13 08:23:59,660 WARN L207 SmtUtils]: Spent 25.79 s on a formula simplification that was a NOOP. DAG size: 1114 [2021-10-13 08:24:25,001 WARN L207 SmtUtils]: Spent 25.23 s on a formula simplification that was a NOOP. DAG size: 1118 [2021-10-13 08:24:25,002 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:24:50,141 WARN L207 SmtUtils]: Spent 25.14 s on a formula simplification that was a NOOP. DAG size: 1052 [2021-10-13 08:25:15,387 WARN L207 SmtUtils]: Spent 25.24 s on a formula simplification that was a NOOP. DAG size: 1109 [2021-10-13 08:25:15,388 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10582223 [2021-10-13 08:25:40,682 WARN L207 SmtUtils]: Spent 25.24 s on a formula simplification that was a NOOP. DAG size: 1109 [2021-10-13 08:25:42,779 INFO L354 Elim1Store]: treesize reduction 417, result has 16.6 percent of original size [2021-10-13 08:25:42,780 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 1 new quantified variables, introduced 5 case distinctions, treesize of input 10582223 treesize of output 7797110 [2021-10-13 08:26:08,072 WARN L207 SmtUtils]: Spent 25.29 s on a formula simplification that was a NOOP. DAG size: 1116 [2021-10-13 08:26:33,694 WARN L207 SmtUtils]: Spent 25.61 s on a formula simplification that was a NOOP. DAG size: 1105 [2021-10-13 08:26:33,954 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2021-10-13 08:26:33,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 9413208 treesize of output 8539650 [2021-10-13 08:26:59,521 WARN L207 SmtUtils]: Spent 25.56 s on a formula simplification that was a NOOP. DAG size: 1119 [2021-10-13 08:26:59,522 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 08:27:00,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:27:00,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602633443] [2021-10-13 08:27:00,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 08:27:00,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1057004887] [2021-10-13 08:27:00,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:27:00,481 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:27:00,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:27:00,488 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:27:00,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-10-13 08:27:01,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:27:01,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:27:01,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 08:27:01,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:27:01,439 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 08:27:01,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:27:01,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:27:01,548 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 08:27:01,548 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 1 case distinctions, treesize of input 40 treesize of output 23 [2021-10-13 08:27:01,584 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 08:27:01,584 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 08:27:01,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:27:01,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 19 [2021-10-13 08:27:01,622 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 20 treesize of output 16 [2021-10-13 08:27:01,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:27:02,253 INFO L354 Elim1Store]: treesize reduction 202, result has 11.0 percent of original size [2021-10-13 08:27:02,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 368 treesize of output 238 [2021-10-13 08:27:02,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:27:02,395 INFO L354 Elim1Store]: treesize reduction 194, result has 10.6 percent of original size [2021-10-13 08:27:02,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 460 treesize of output 314 [2021-10-13 08:27:02,400 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:02,402 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 215 [2021-10-13 08:27:02,405 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:02,406 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 222 [2021-10-13 08:27:02,443 INFO L354 Elim1Store]: treesize reduction 108, result has 20.0 percent of original size [2021-10-13 08:27:02,444 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 2 case distinctions, treesize of input 222 treesize of output 188 [2021-10-13 08:27:02,472 INFO L354 Elim1Store]: treesize reduction 22, result has 61.4 percent of original size [2021-10-13 08:27:02,472 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 148 treesize of output 160 [2021-10-13 08:27:02,476 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 08:27:03,122 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-10-13 08:27:03,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 148 treesize of output 142 [2021-10-13 08:27:03,146 INFO L354 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2021-10-13 08:27:03,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 133 treesize of output 120 [2021-10-13 08:27:03,152 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-13 08:27:03,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 76 [2021-10-13 08:27:03,235 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-10-13 08:27:03,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 69 [2021-10-13 08:27:03,241 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-13 08:27:03,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 41 [2021-10-13 08:27:03,348 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 42 treesize of output 26 [2021-10-13 08:27:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:27:03,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:27:03,522 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:03,522 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-13 08:27:03,525 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:03,525 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-10-13 08:27:04,136 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:04,137 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 203 [2021-10-13 08:27:04,139 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:04,140 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 243 [2021-10-13 08:27:04,142 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:04,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 266 [2021-10-13 08:27:04,145 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:04,146 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 289 [2021-10-13 08:27:08,631 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_132 (_ BitVec 32)) (v_DerPreprocessor_133 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_134 (_ BitVec 32)) (v_DerPreprocessor_135 (_ BitVec 32)) (v_DerPreprocessor_130 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_114 (_ BitVec 32)) (v_DerPreprocessor_131 (_ BitVec 32))) (let ((.cse5 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset)) (.cse7 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset))) (let ((.cse0 (select (store (select (let ((.cse8 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base) .cse5 v_ULTIMATE.start_main_~p~0.base_114)))) (store .cse8 v_ULTIMATE.start_main_~p~0.base_114 (store (store (select .cse8 v_ULTIMATE.start_main_~p~0.base_114) (_ bv4 32) (_ bv0 32)) (_ bv0 32) v_DerPreprocessor_134))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset v_DerPreprocessor_130) .cse7)) (.cse1 (select (store (select (let ((.cse6 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~tail~0.base) .cse5 (_ bv0 32))))) (store .cse6 v_ULTIMATE.start_main_~p~0.base_114 (store (store (select .cse6 v_ULTIMATE.start_main_~p~0.base_114) (_ bv4 32) (_ bv0 32)) (_ bv0 32) v_DerPreprocessor_135))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset v_DerPreprocessor_131) .cse7))) (or (and (= .cse0 (_ bv0 32)) (= .cse1 (_ bv0 32))) (bvsge (select (select (let ((.cse2 (let ((.cse4 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) .cse5 v_DerPreprocessor_133)))) (store .cse4 v_ULTIMATE.start_main_~p~0.base_114 (store (store (select .cse4 v_ULTIMATE.start_main_~p~0.base_114) (_ bv4 32) v_DerPreprocessor_132) (_ bv0 32) ULTIMATE.start_main_~x~0))))) (store .cse2 c_ULTIMATE.start_main_~list~0.base (let ((.cse3 (select .cse2 c_ULTIMATE.start_main_~list~0.base))) (store .cse3 c_ULTIMATE.start_main_~list~0.offset (bvadd (_ bv1 32) (select .cse3 c_ULTIMATE.start_main_~list~0.offset)))))) .cse0) .cse1) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_114)))))))) is different from false [2021-10-13 08:27:13,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:13,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 351122 treesize of output 346725 [2021-10-13 08:27:15,714 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:17,393 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 453182 [2021-10-13 08:27:20,016 INFO L354 Elim1Store]: treesize reduction 243, result has 25.7 percent of original size [2021-10-13 08:27:20,017 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 1 new quantified variables, introduced 5 case distinctions, treesize of input 453182 treesize of output 291473 [2021-10-13 08:27:22,636 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-10-13 08:27:22,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 362217 treesize of output 322777 [2021-10-13 08:27:25,231 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:26,915 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 429232 [2021-10-13 08:27:28,050 INFO L354 Elim1Store]: treesize reduction 289, result has 19.9 percent of original size [2021-10-13 08:27:28,051 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 1 new quantified variables, introduced 5 case distinctions, treesize of input 429232 treesize of output 259319 [2021-10-13 08:27:29,968 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2021-10-13 08:27:29,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 259301 treesize of output 255241 [2021-10-13 08:27:30,835 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 08:27:31,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 08:27:31,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097773560] [2021-10-13 08:27:31,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:27:31,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:27:31,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:27:31,085 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:27:31,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-13 08:27:31,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:27:31,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:27:31,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 08:27:31,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:27:31,855 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 08:27:31,911 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 20 treesize of output 16 [2021-10-13 08:27:31,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:27:31,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:27:31,949 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 08:27:31,949 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 1 case distinctions, treesize of input 40 treesize of output 23 [2021-10-13 08:27:31,990 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 08:27:31,990 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 08:27:32,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:27:32,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 19 [2021-10-13 08:27:32,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:27:32,820 INFO L354 Elim1Store]: treesize reduction 209, result has 11.1 percent of original size [2021-10-13 08:27:32,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 293 treesize of output 179 [2021-10-13 08:27:32,826 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:32,827 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 285 [2021-10-13 08:27:32,830 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:32,831 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 292 [2021-10-13 08:27:32,956 INFO L354 Elim1Store]: treesize reduction 332, result has 12.2 percent of original size [2021-10-13 08:27:32,957 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 3 case distinctions, treesize of input 292 treesize of output 258 [2021-10-13 08:27:32,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:27:33,039 INFO L354 Elim1Store]: treesize reduction 429, result has 8.9 percent of original size [2021-10-13 08:27:33,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 216 treesize of output 151 [2021-10-13 08:27:33,069 INFO L354 Elim1Store]: treesize reduction 22, result has 61.4 percent of original size [2021-10-13 08:27:33,069 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 152 treesize of output 164 [2021-10-13 08:27:33,070 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 08:27:33,686 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-10-13 08:27:33,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 201 treesize of output 162 [2021-10-13 08:27:33,727 INFO L354 Elim1Store]: treesize reduction 61, result has 10.3 percent of original size [2021-10-13 08:27:33,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 142 treesize of output 101 [2021-10-13 08:27:33,753 INFO L354 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2021-10-13 08:27:33,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 114 [2021-10-13 08:27:33,869 INFO L354 Elim1Store]: treesize reduction 45, result has 8.2 percent of original size [2021-10-13 08:27:33,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 97 [2021-10-13 08:27:33,879 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-13 08:27:33,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 48 [2021-10-13 08:27:33,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-10-13 08:27:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:27:33,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:27:33,975 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:33,976 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-10-13 08:27:33,978 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:33,979 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 08:27:34,149 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:34,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-10-13 08:27:34,154 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:34,155 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 228 [2021-10-13 08:27:34,158 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:34,159 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 220 [2021-10-13 08:27:34,162 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:34,163 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 212 [2021-10-13 08:27:36,534 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_143 (_ BitVec 32)) (v_DerPreprocessor_121 (_ BitVec 32)) (v_DerPreprocessor_144 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_145 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_119 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_119 (_ BitVec 32)) (v_DerPreprocessor_142 (_ BitVec 32)) (v_DerPreprocessor_120 (_ BitVec 32))) (or (bvsge (let ((.cse3 (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_119)) (.cse4 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset)) (.cse6 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) .cse4 v_DerPreprocessor_143)))) (store .cse2 v_ULTIMATE.start_main_~p~0.base_119 (store (store (select .cse2 v_ULTIMATE.start_main_~p~0.base_119) .cse3 v_DerPreprocessor_142) v_ULTIMATE.start_main_~p~0.offset_119 ULTIMATE.start_main_~x~0))))) (store .cse0 c_ULTIMATE.start_main_~list~0.base (let ((.cse1 (select .cse0 c_ULTIMATE.start_main_~list~0.base))) (store .cse1 c_ULTIMATE.start_main_~list~0.offset (bvadd (select .cse1 c_ULTIMATE.start_main_~list~0.offset) (_ bv1 32)))))) (select (store (select (let ((.cse5 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base) .cse4 v_ULTIMATE.start_main_~p~0.base_119)))) (store .cse5 v_ULTIMATE.start_main_~p~0.base_119 (store (store (select .cse5 v_ULTIMATE.start_main_~p~0.base_119) .cse3 (_ bv0 32)) v_ULTIMATE.start_main_~p~0.offset_119 v_DerPreprocessor_144))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset v_DerPreprocessor_120) .cse6)) (select (store (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~tail~0.base) .cse4 v_ULTIMATE.start_main_~p~0.offset_119)))) (store .cse7 v_ULTIMATE.start_main_~p~0.base_119 (store (store (select .cse7 v_ULTIMATE.start_main_~p~0.base_119) .cse3 (_ bv0 32)) v_ULTIMATE.start_main_~p~0.offset_119 v_DerPreprocessor_145))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset v_DerPreprocessor_121) .cse6))) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_119)))))) is different from false [2021-10-13 08:27:37,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:37,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70764 treesize of output 70019 [2021-10-13 08:27:38,120 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:38,522 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83240 [2021-10-13 08:27:44,076 WARN L207 SmtUtils]: Spent 5.33 s on a formula simplification. DAG size of input: 95 DAG size of output: 48 [2021-10-13 08:27:44,076 INFO L354 Elim1Store]: treesize reduction 366, result has 19.0 percent of original size [2021-10-13 08:27:44,077 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 1 new quantified variables, introduced 5 case distinctions, treesize of input 83240 treesize of output 62670 [2021-10-13 08:27:45,458 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-10-13 08:27:45,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 77598 treesize of output 69652 [2021-10-13 08:27:46,101 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:27:46,516 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82871 [2021-10-13 08:27:53,738 WARN L207 SmtUtils]: Spent 7.00 s on a formula simplification. DAG size of input: 94 DAG size of output: 46 [2021-10-13 08:27:53,739 INFO L354 Elim1Store]: treesize reduction 417, result has 16.6 percent of original size [2021-10-13 08:27:53,739 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 1 new quantified variables, introduced 5 case distinctions, treesize of input 82871 treesize of output 61278 [2021-10-13 08:27:54,353 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2021-10-13 08:27:54,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74168 treesize of output 67238 [2021-10-13 08:27:54,569 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 08:27:54,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 08:27:54,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:27:54,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 08:27:54,653 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 08:27:54,653 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 08:27:54,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:27:54,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-13 08:27:54,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-13 08:27:55,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-10-13 08:27:55,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:27:55,279 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:27:55,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:27:55 BoogieIcfgContainer [2021-10-13 08:27:55,310 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:27:55,311 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:27:55,311 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:27:55,311 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:27:55,311 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:16:11" (3/4) ... [2021-10-13 08:27:55,314 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 08:27:55,314 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:27:55,315 INFO L168 Benchmark]: Toolchain (without parser) took 705581.30 ms. Allocated memory was 67.1 MB in the beginning and 650.1 MB in the end (delta: 583.0 MB). Free memory was 44.7 MB in the beginning and 204.0 MB in the end (delta: -159.4 MB). Peak memory consumption was 422.8 MB. Max. memory is 16.1 GB. [2021-10-13 08:27:55,315 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 67.1 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:27:55,316 INFO L168 Benchmark]: CACSL2BoogieTranslator took 721.76 ms. Allocated memory is still 67.1 MB. Free memory was 44.4 MB in the beginning and 41.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:27:55,316 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.46 ms. Allocated memory is still 67.1 MB. Free memory was 41.8 MB in the beginning and 39.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:27:55,316 INFO L168 Benchmark]: Boogie Preprocessor took 51.42 ms. Allocated memory is still 67.1 MB. Free memory was 39.8 MB in the beginning and 38.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:27:55,316 INFO L168 Benchmark]: RCFGBuilder took 687.56 ms. Allocated memory is still 67.1 MB. Free memory was 38.1 MB in the beginning and 42.8 MB in the end (delta: -4.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:27:55,317 INFO L168 Benchmark]: TraceAbstraction took 704037.13 ms. Allocated memory was 67.1 MB in the beginning and 650.1 MB in the end (delta: 583.0 MB). Free memory was 42.3 MB in the beginning and 204.0 MB in the end (delta: -161.8 MB). Peak memory consumption was 423.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:27:55,317 INFO L168 Benchmark]: Witness Printer took 3.84 ms. Allocated memory is still 650.1 MB. Free memory is still 204.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:27:55,318 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 67.1 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 721.76 ms. Allocated memory is still 67.1 MB. Free memory was 44.4 MB in the beginning and 41.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 73.46 ms. Allocated memory is still 67.1 MB. Free memory was 41.8 MB in the beginning and 39.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.42 ms. Allocated memory is still 67.1 MB. Free memory was 39.8 MB in the beginning and 38.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 687.56 ms. Allocated memory is still 67.1 MB. Free memory was 38.1 MB in the beginning and 42.8 MB in the end (delta: -4.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 704037.13 ms. Allocated memory was 67.1 MB in the beginning and 650.1 MB in the end (delta: 583.0 MB). Free memory was 42.3 MB in the beginning and 204.0 MB in the end (delta: -161.8 MB). Peak memory consumption was 423.7 MB. Max. memory is 16.1 GB. * Witness Printer took 3.84 ms. Allocated memory is still 650.1 MB. Free memory is still 204.0 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: 589]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L573] Node *p, *list = malloc(sizeof(*list)); [L573] Node *p, *list = malloc(sizeof(*list)); [L574] Node *tail = list; [L575] list->next = ((void *)0) [L576] list->val = 10 [L577] COND TRUE __VERIFIER_nondet_int() [L578] int x = __VERIFIER_nondet_int(); [L579] COND FALSE !(x < 10 || x > 20) [L580] p = malloc(sizeof(*p)) [L581] tail->next = p [L582] p->next = ((void *)0) [L583] p->val = x [L584] tail = p [L577] COND TRUE __VERIFIER_nondet_int() [L578] int x = __VERIFIER_nondet_int(); [L579] COND FALSE !(x < 10 || x > 20) [L580] p = malloc(sizeof(*p)) [L581] tail->next = p [L582] p->next = ((void *)0) [L583] p->val = x [L584] tail = p [L577] COND FALSE !(__VERIFIER_nondet_int()) [L586] COND TRUE 1 [L587] p = list [L587] COND TRUE p!= ((void *)0) [L588] EXPR p->val [L588] EXPR p->val <= 20 && p->val >= 10 [L588] EXPR p->val [L588] EXPR p->val <= 20 && p->val >= 10 [L588] COND FALSE !(!(p->val <= 20 && p->val >= 10)) [L590] EXPR p->val [L590] COND TRUE p->val < 20 [L590] EXPR p->val [L590] p->val++ [L587] EXPR p->next [L587] p = p->next [L587] COND TRUE p!= ((void *)0) [L588] EXPR p->val [L588] EXPR p->val <= 20 && p->val >= 10 [L588] EXPR p->val [L588] EXPR p->val <= 20 && p->val >= 10 [L588] COND TRUE !(p->val <= 20 && p->val >= 10) [L589] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 703934.3ms, OverallIterations: 12, TraceHistogramMax: 4, EmptinessCheckTime: 26.5ms, AutomataDifference: 52009.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 212 SDtfs, 654 SDslu, 1120 SDs, 0 SdLazy, 1658 SolverSat, 365 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14651.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 831 GetRequests, 596 SyntacticMatches, 14 SemanticMatches, 221 ConstructedPredicates, 33 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 92842.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=10, InterpolantAutomatonStates: 160, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 157.4ms AutomataMinimizationTime, 11 MinimizatonAttempts, 451 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 239.9ms SsaConstructionTime, 2376.4ms SatisfiabilityAnalysisTime, 138520.8ms InterpolantComputationTime, 386 NumberOfCodeBlocks, 386 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 724 ConstructedInterpolants, 161 QuantifiedInterpolants, 18692 SizeOfPredicates, 301 NumberOfNonLiveVariables, 1736 ConjunctsInSsa, 402 ConjunctsInUnsatCore, 48 InterpolantComputations, 6 PerfectInterpolantSequences, 70/368 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 08:27:55,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fde0d6d-c456-4bdc-81db-2708a9e17b1d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...