./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 aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-data/running_example.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V --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 318c7aa22aeecc0174739978e9fb15d261281003454726c8705d95a97106063f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:23:48,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:23:48,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:23:48,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:23:48,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:23:48,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:23:48,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:23:48,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:23:48,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:23:48,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:23:48,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:23:48,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:23:48,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:23:48,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:23:48,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:23:49,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:23:49,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:23:49,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:23:49,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:23:49,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:23:49,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:23:49,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:23:49,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:23:49,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:23:49,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:23:49,033 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:23:49,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:23:49,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:23:49,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:23:49,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:23:49,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:23:49,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:23:49,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:23:49,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:23:49,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:23:49,043 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:23:49,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:23:49,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:23:49,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:23:49,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:23:49,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:23:49,046 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:23:49,099 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:23:49,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:23:49,100 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:23:49,100 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:23:49,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:23:49,101 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:23:49,101 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:23:49,101 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:23:49,102 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:23:49,102 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:23:49,102 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:23:49,102 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:23:49,103 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:23:49,103 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:23:49,103 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:23:49,103 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:23:49,103 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:23:49,104 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:23:49,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:23:49,105 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:23:49,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:23:49,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:23:49,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:23:49,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:23:49,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:23:49,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:23:49,106 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:23:49,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:23:49,107 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:23:49,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:23:49,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:23:49,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:23:49,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:23:49,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:23:49,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:23:49,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:23:49,108 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:23:49,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:23:49,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:23:49,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:23:49,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:23:49,109 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_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 318c7aa22aeecc0174739978e9fb15d261281003454726c8705d95a97106063f [2021-11-23 02:23:49,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:23:49,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:23:49,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:23:49,422 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:23:49,423 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:23:49,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/heap-data/running_example.i [2021-11-23 02:23:49,520 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/data/43af26b42/76b4133501464fa9b0b70e888525aeed/FLAG3433c2be0 [2021-11-23 02:23:50,039 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:23:50,044 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/sv-benchmarks/c/heap-data/running_example.i [2021-11-23 02:23:50,058 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/data/43af26b42/76b4133501464fa9b0b70e888525aeed/FLAG3433c2be0 [2021-11-23 02:23:50,336 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/data/43af26b42/76b4133501464fa9b0b70e888525aeed [2021-11-23 02:23:50,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:23:50,340 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:23:50,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:23:50,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:23:50,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:23:50,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:23:50" (1/1) ... [2021-11-23 02:23:50,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8676f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:50, skipping insertion in model container [2021-11-23 02:23:50,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:23:50" (1/1) ... [2021-11-23 02:23:50,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:23:50,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:23:50,738 WARN L230 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_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2021-11-23 02:23:50,746 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:23:50,756 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:23:50,817 WARN L230 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_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2021-11-23 02:23:50,825 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:23:50,862 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:23:50,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:50 WrapperNode [2021-11-23 02:23:50,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:23:50,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:23:50,864 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:23:50,864 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:23:50,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:50" (1/1) ... [2021-11-23 02:23:50,884 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:50" (1/1) ... [2021-11-23 02:23:50,905 INFO L137 Inliner]: procedures = 121, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 72 [2021-11-23 02:23:50,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:23:50,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:23:50,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:23:50,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:23:50,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:50" (1/1) ... [2021-11-23 02:23:50,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:50" (1/1) ... [2021-11-23 02:23:50,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:50" (1/1) ... [2021-11-23 02:23:50,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:50" (1/1) ... [2021-11-23 02:23:50,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:50" (1/1) ... [2021-11-23 02:23:50,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:50" (1/1) ... [2021-11-23 02:23:50,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:50" (1/1) ... [2021-11-23 02:23:50,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:23:50,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:23:50,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:23:50,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:23:50,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:50" (1/1) ... [2021-11-23 02:23:50,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:23:50,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:23:51,000 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:23:51,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:23:51,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:23:51,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:23:51,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:23:51,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:23:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:23:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:23:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:23:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:23:51,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:23:51,164 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:23:51,166 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:23:51,337 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:23:51,377 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:23:51,377 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 02:23:51,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:23:51 BoogieIcfgContainer [2021-11-23 02:23:51,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:23:51,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:23:51,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:23:51,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:23:51,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:23:50" (1/3) ... [2021-11-23 02:23:51,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bafee37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:23:51, skipping insertion in model container [2021-11-23 02:23:51,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:50" (2/3) ... [2021-11-23 02:23:51,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bafee37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:23:51, skipping insertion in model container [2021-11-23 02:23:51,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:23:51" (3/3) ... [2021-11-23 02:23:51,389 INFO L111 eAbstractionObserver]: Analyzing ICFG running_example.i [2021-11-23 02:23:51,394 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:23:51,395 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:23:51,441 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:23:51,448 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, mAutomataTypeConcurrency=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 [2021-11-23 02:23:51,449 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:23:51,461 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) [2021-11-23 02:23:51,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:23:51,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:51,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:23:51,468 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:51,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:51,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1470856896, now seen corresponding path program 1 times [2021-11-23 02:23:51,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:51,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746980430] [2021-11-23 02:23:51,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:51,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:23:51,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:23:51,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746980430] [2021-11-23 02:23:51,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746980430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:23:51,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:23:51,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:23:51,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137247371] [2021-11-23 02:23:51,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:23:51,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:23:51,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:23:51,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:23:51,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:23:51,655 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) [2021-11-23 02:23:51,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:51,713 INFO L93 Difference]: Finished difference Result 18 states and 26 transitions. [2021-11-23 02:23:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:23:51,716 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 [2021-11-23 02:23:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:51,723 INFO L225 Difference]: With dead ends: 18 [2021-11-23 02:23:51,723 INFO L226 Difference]: Without dead ends: 11 [2021-11-23 02:23:51,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:23:51,729 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:51,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:23:51,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-23 02:23:51,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-23 02:23:51,767 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) [2021-11-23 02:23:51,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-11-23 02:23:51,769 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2021-11-23 02:23:51,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:51,770 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-11-23 02:23:51,770 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) [2021-11-23 02:23:51,770 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2021-11-23 02:23:51,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 02:23:51,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:51,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:23:51,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:23:51,772 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:51,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:51,773 INFO L85 PathProgramCache]: Analyzing trace with hash 237321750, now seen corresponding path program 1 times [2021-11-23 02:23:51,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:51,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500109828] [2021-11-23 02:23:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:51,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:23:51,953 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:23:51,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500109828] [2021-11-23 02:23:51,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500109828] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:23:51,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:23:51,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:23:51,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134963805] [2021-11-23 02:23:51,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:23:51,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:23:51,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:23:51,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:23:51,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:23:51,957 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) [2021-11-23 02:23:52,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:52,053 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2021-11-23 02:23:52,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:23:52,054 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 [2021-11-23 02:23:52,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:52,055 INFO L225 Difference]: With dead ends: 22 [2021-11-23 02:23:52,055 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 02:23:52,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:23:52,062 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:52,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:23:52,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 02:23:52,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-23 02:23:52,074 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) [2021-11-23 02:23:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-23 02:23:52,076 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 8 [2021-11-23 02:23:52,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:52,078 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-23 02:23:52,078 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) [2021-11-23 02:23:52,078 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-23 02:23:52,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:23:52,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:52,085 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:23:52,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:23:52,086 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:52,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:52,087 INFO L85 PathProgramCache]: Analyzing trace with hash 540596448, now seen corresponding path program 1 times [2021-11-23 02:23:52,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:52,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620537015] [2021-11-23 02:23:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:52,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:23:52,342 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:23:52,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620537015] [2021-11-23 02:23:52,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620537015] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:23:52,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905685222] [2021-11-23 02:23:52,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:52,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:23:52,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:23:52,349 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:23:52,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:23:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:52,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:23:52,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:23:52,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:23:52,495 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 [2021-11-23 02:23:52,502 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 [2021-11-23 02:23:52,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:23:52,511 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 [2021-11-23 02:23:52,746 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 [2021-11-23 02:23:52,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2021-11-23 02:23:52,760 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 32 treesize of output 28 [2021-11-23 02:23:52,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-11-23 02:23:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:23:52,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:23:52,882 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-23 02:23:52,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [49231077] [2021-11-23 02:23:52,912 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:23:52,913 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:23:52,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:23:52,923 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:23:52,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:23:52,969 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@1188b0f1 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) 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.applyComplexEliminationRules(ElimStorePlain.java:388) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) 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:119) 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:610) 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:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) 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) [2021-11-23 02:23:52,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:23:52,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-23 02:23:52,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810876307] [2021-11-23 02:23:52,972 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 02:23:52,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:23:52,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:23:52,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:23:52,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:23:52,987 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) [2021-11-23 02:23:52,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:23:52,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:23:52,990 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:52,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:23:53,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:23:53,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:23:53,216 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@1188b0f1 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) 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:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) 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:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) 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) [2021-11-23 02:23:53,218 INFO L158 Benchmark]: Toolchain (without parser) took 2878.19ms. Allocated memory was 104.9MB in the beginning and 146.8MB in the end (delta: 41.9MB). Free memory was 61.3MB in the beginning and 120.6MB in the end (delta: -59.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:23:53,218 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 104.9MB. Free memory is still 79.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:23:53,219 INFO L158 Benchmark]: CACSL2BoogieTranslator took 521.53ms. Allocated memory is still 104.9MB. Free memory was 61.1MB in the beginning and 71.6MB in the end (delta: -10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 02:23:53,219 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.93ms. Allocated memory is still 104.9MB. Free memory was 71.6MB in the beginning and 69.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:23:53,220 INFO L158 Benchmark]: Boogie Preprocessor took 30.37ms. Allocated memory is still 104.9MB. Free memory was 69.6MB in the beginning and 68.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:23:53,220 INFO L158 Benchmark]: RCFGBuilder took 442.84ms. Allocated memory is still 104.9MB. Free memory was 68.1MB in the beginning and 54.9MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 02:23:53,221 INFO L158 Benchmark]: TraceAbstraction took 1835.40ms. Allocated memory was 104.9MB in the beginning and 146.8MB in the end (delta: 41.9MB). Free memory was 54.6MB in the beginning and 120.6MB in the end (delta: -66.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:23:53,223 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 104.9MB. Free memory is still 79.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 521.53ms. Allocated memory is still 104.9MB. Free memory was 61.1MB in the beginning and 71.6MB in the end (delta: -10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.93ms. Allocated memory is still 104.9MB. Free memory was 71.6MB in the beginning and 69.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.37ms. Allocated memory is still 104.9MB. Free memory was 69.6MB in the beginning and 68.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 442.84ms. Allocated memory is still 104.9MB. Free memory was 68.1MB in the beginning and 54.9MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1835.40ms. Allocated memory was 104.9MB in the beginning and 146.8MB in the end (delta: 41.9MB). Free memory was 54.6MB in the beginning and 120.6MB in the end (delta: -66.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@1188b0f1 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@1188b0f1: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 02:23:53,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-data/running_example.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V --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 318c7aa22aeecc0174739978e9fb15d261281003454726c8705d95a97106063f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:23:55,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:23:55,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:23:55,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:23:55,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:23:55,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:23:55,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:23:55,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:23:55,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:23:55,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:23:55,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:23:55,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:23:55,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:23:55,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:23:55,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:23:55,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:23:55,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:23:55,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:23:55,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:23:55,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:23:55,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:23:55,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:23:55,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:23:55,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:23:55,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:23:55,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:23:55,651 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:23:55,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:23:55,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:23:55,653 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:23:55,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:23:55,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:23:55,655 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:23:55,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:23:55,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:23:55,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:23:55,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:23:55,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:23:55,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:23:55,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:23:55,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:23:55,669 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 02:23:55,701 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:23:55,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:23:55,702 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:23:55,702 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:23:55,703 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:23:55,703 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:23:55,704 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:23:55,704 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:23:55,704 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:23:55,704 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:23:55,705 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:23:55,706 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:23:55,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:23:55,707 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:23:55,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:23:55,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:23:55,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:23:55,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:23:55,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:23:55,709 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:23:55,709 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:23:55,709 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:23:55,709 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:23:55,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:23:55,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:23:55,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:23:55,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:23:55,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:23:55,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:23:55,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:23:55,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:23:55,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:23:55,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:23:55,712 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:23:55,712 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:23:55,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:23:55,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:23:55,713 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:23:55,713 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_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 318c7aa22aeecc0174739978e9fb15d261281003454726c8705d95a97106063f [2021-11-23 02:23:56,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:23:56,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:23:56,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:23:56,178 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:23:56,180 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:23:56,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/heap-data/running_example.i [2021-11-23 02:23:56,257 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/data/e80946402/c8ff44d4f2ae4a9d9f4492a6f44cdc67/FLAGf0a417605 [2021-11-23 02:23:56,857 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:23:56,860 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/sv-benchmarks/c/heap-data/running_example.i [2021-11-23 02:23:56,874 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/data/e80946402/c8ff44d4f2ae4a9d9f4492a6f44cdc67/FLAGf0a417605 [2021-11-23 02:23:57,087 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/data/e80946402/c8ff44d4f2ae4a9d9f4492a6f44cdc67 [2021-11-23 02:23:57,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:23:57,090 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:23:57,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:23:57,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:23:57,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:23:57,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:23:57" (1/1) ... [2021-11-23 02:23:57,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@765dbf02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:57, skipping insertion in model container [2021-11-23 02:23:57,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:23:57" (1/1) ... [2021-11-23 02:23:57,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:23:57,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:23:57,507 WARN L230 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_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2021-11-23 02:23:57,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:23:57,536 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:23:57,619 WARN L230 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_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2021-11-23 02:23:57,621 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:23:57,662 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:23:57,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:57 WrapperNode [2021-11-23 02:23:57,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:23:57,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:23:57,665 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:23:57,665 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:23:57,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:57" (1/1) ... [2021-11-23 02:23:57,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:57" (1/1) ... [2021-11-23 02:23:57,744 INFO L137 Inliner]: procedures = 124, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 71 [2021-11-23 02:23:57,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:23:57,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:23:57,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:23:57,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:23:57,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:57" (1/1) ... [2021-11-23 02:23:57,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:57" (1/1) ... [2021-11-23 02:23:57,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:57" (1/1) ... [2021-11-23 02:23:57,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:57" (1/1) ... [2021-11-23 02:23:57,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:57" (1/1) ... [2021-11-23 02:23:57,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:57" (1/1) ... [2021-11-23 02:23:57,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:57" (1/1) ... [2021-11-23 02:23:57,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:23:57,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:23:57,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:23:57,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:23:57,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:57" (1/1) ... [2021-11-23 02:23:57,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:23:57,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:23:57,849 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:23:57,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:23:57,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 02:23:57,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:23:57,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:23:57,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:23:57,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:23:57,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 02:23:57,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 02:23:57,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:23:57,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:23:58,064 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:23:58,066 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:23:58,336 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:23:58,341 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:23:58,342 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 02:23:58,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:23:58 BoogieIcfgContainer [2021-11-23 02:23:58,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:23:58,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:23:58,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:23:58,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:23:58,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:23:57" (1/3) ... [2021-11-23 02:23:58,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16dfd0df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:23:58, skipping insertion in model container [2021-11-23 02:23:58,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:57" (2/3) ... [2021-11-23 02:23:58,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16dfd0df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:23:58, skipping insertion in model container [2021-11-23 02:23:58,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:23:58" (3/3) ... [2021-11-23 02:23:58,351 INFO L111 eAbstractionObserver]: Analyzing ICFG running_example.i [2021-11-23 02:23:58,357 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:23:58,357 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:23:58,430 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:23:58,442 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, mAutomataTypeConcurrency=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 [2021-11-23 02:23:58,443 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:23:58,457 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) [2021-11-23 02:23:58,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 02:23:58,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:58,465 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:23:58,466 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:58,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:58,472 INFO L85 PathProgramCache]: Analyzing trace with hash 508893296, now seen corresponding path program 1 times [2021-11-23 02:23:58,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:23:58,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101747149] [2021-11-23 02:23:58,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:58,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:23:58,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:23:58,491 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:23:58,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:23:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:58,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 02:23:58,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:23:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:23:58,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:23:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:23:58,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:23:58,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101747149] [2021-11-23 02:23:58,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101747149] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:23:58,654 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:23:58,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 02:23:58,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408590307] [2021-11-23 02:23:58,657 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:23:58,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:23:58,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:23:58,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:23:58,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:23:58,695 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) [2021-11-23 02:23:58,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:58,707 INFO L93 Difference]: Finished difference Result 26 states and 42 transitions. [2021-11-23 02:23:58,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:23:58,709 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 [2021-11-23 02:23:58,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:58,716 INFO L225 Difference]: With dead ends: 26 [2021-11-23 02:23:58,717 INFO L226 Difference]: Without dead ends: 14 [2021-11-23 02:23:58,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:23:58,723 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:58,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:23:58,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-23 02:23:58,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-23 02:23:58,749 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) [2021-11-23 02:23:58,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2021-11-23 02:23:58,750 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 8 [2021-11-23 02:23:58,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:58,755 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2021-11-23 02:23:58,755 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) [2021-11-23 02:23:58,755 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2021-11-23 02:23:58,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:23:58,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:58,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:23:58,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 02:23:58,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:23:58,975 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:58,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:58,975 INFO L85 PathProgramCache]: Analyzing trace with hash 307872697, now seen corresponding path program 1 times [2021-11-23 02:23:58,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:23:58,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808628025] [2021-11-23 02:23:58,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:58,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:23:58,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:23:58,978 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:23:59,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:23:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:59,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:23:59,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:23:59,102 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 [2021-11-23 02:23:59,194 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 [2021-11-23 02:23:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:23:59,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:23:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:23:59,264 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:23:59,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808628025] [2021-11-23 02:23:59,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808628025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:23:59,265 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:23:59,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-23 02:23:59,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241393236] [2021-11-23 02:23:59,266 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:23:59,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:23:59,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:23:59,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:23:59,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:23:59,269 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) [2021-11-23 02:23:59,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:59,884 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2021-11-23 02:23:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:23:59,887 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 [2021-11-23 02:23:59,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:59,889 INFO L225 Difference]: With dead ends: 52 [2021-11-23 02:23:59,890 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 02:23:59,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:23:59,892 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:59,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 80 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:23:59,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 02:23:59,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2021-11-23 02:23:59,911 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) [2021-11-23 02:23:59,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 41 transitions. [2021-11-23 02:23:59,912 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 41 transitions. Word has length 9 [2021-11-23 02:23:59,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:59,913 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 41 transitions. [2021-11-23 02:23:59,913 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) [2021-11-23 02:23:59,913 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 41 transitions. [2021-11-23 02:23:59,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 02:23:59,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:59,914 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:23:59,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:24:00,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:24:00,115 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:00,116 INFO L85 PathProgramCache]: Analyzing trace with hash -44654956, now seen corresponding path program 1 times [2021-11-23 02:24:00,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:24:00,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538741831] [2021-11-23 02:24:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:00,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:24:00,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:24:00,119 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:24:00,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 02:24:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:00,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:24:00,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:24:00,291 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 [2021-11-23 02:24:00,307 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 [2021-11-23 02:24:00,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:00,624 INFO L354 Elim1Store]: treesize reduction 152, result has 14.6 percent of original size [2021-11-23 02:24:00,624 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 60 treesize of output 52 [2021-11-23 02:24:00,646 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:24:00,647 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 24 treesize of output 24 [2021-11-23 02:24:00,798 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 [2021-11-23 02:24:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:24:00,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:24:02,977 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_4 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_17| (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_17| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_4)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_17| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_17|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_17|) v_DerPreprocessor_3) |v_ULTIMATE.start_main_~p~0#1.offset_17| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_17|)))))) is different from false [2021-11-23 02:24:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 02:24:03,198 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:24:03,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538741831] [2021-11-23 02:24:03,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538741831] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:24:03,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [605776767] [2021-11-23 02:24:03,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:03,199 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:24:03,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:24:03,205 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:24:03,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 02:24:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:03,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:24:03,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:24:03,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:24:03,381 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 [2021-11-23 02:24:03,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:03,631 INFO L354 Elim1Store]: treesize reduction 152, result has 14.6 percent of original size [2021-11-23 02:24:03,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 51 [2021-11-23 02:24:03,648 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:24:03,649 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 [2021-11-23 02:24:03,739 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 [2021-11-23 02:24:03,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:24:03,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:24:05,866 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_20| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_20| (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_20|))))) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_8)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_20| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_20|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_20|) v_DerPreprocessor_7) |v_ULTIMATE.start_main_~p~0#1.offset_20| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)))) is different from false [2021-11-23 02:24:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 02:24:05,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [605776767] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:24:05,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978369390] [2021-11-23 02:24:05,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:05,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:24:05,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:24:05,999 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:24:06,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:24:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:06,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:24:06,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:24:06,091 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 [2021-11-23 02:24:06,114 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 [2021-11-23 02:24:06,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:06,347 INFO L354 Elim1Store]: treesize reduction 152, result has 14.6 percent of original size [2021-11-23 02:24:06,347 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 60 treesize of output 52 [2021-11-23 02:24:06,362 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:24:06,362 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 24 treesize of output 24 [2021-11-23 02:24:06,429 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 [2021-11-23 02:24:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:24:06,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:24:08,549 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_23| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_23| (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_23|)))) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_12)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_23| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_23|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_23|) v_DerPreprocessor_11) |v_ULTIMATE.start_main_~p~0#1.offset_23| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)))) is different from false [2021-11-23 02:24:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 02:24:08,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978369390] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:24:08,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:24:08,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2021-11-23 02:24:08,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145694326] [2021-11-23 02:24:08,666 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:24:08,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 02:24:08,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:24:08,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 02:24:08,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=42, Unknown=3, NotChecked=42, Total=110 [2021-11-23 02:24:08,669 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) [2021-11-23 02:24:09,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:09,741 INFO L93 Difference]: Finished difference Result 69 states and 97 transitions. [2021-11-23 02:24:09,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:24:09,743 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 [2021-11-23 02:24:09,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:09,745 INFO L225 Difference]: With dead ends: 69 [2021-11-23 02:24:09,745 INFO L226 Difference]: Without dead ends: 60 [2021-11-23 02:24:09,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=82, Invalid=137, Unknown=3, NotChecked=84, Total=306 [2021-11-23 02:24:09,750 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:09,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 97 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 98 Invalid, 0 Unknown, 132 Unchecked, 0.8s Time] [2021-11-23 02:24:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-23 02:24:09,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 32. [2021-11-23 02:24:09,758 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) [2021-11-23 02:24:09,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2021-11-23 02:24:09,759 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 12 [2021-11-23 02:24:09,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:09,759 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2021-11-23 02:24:09,760 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) [2021-11-23 02:24:09,760 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2021-11-23 02:24:09,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 02:24:09,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:09,761 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:09,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 02:24:09,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:24:10,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:24:10,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:24:10,378 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:10,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:10,379 INFO L85 PathProgramCache]: Analyzing trace with hash -893074814, now seen corresponding path program 1 times [2021-11-23 02:24:10,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:24:10,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786627074] [2021-11-23 02:24:10,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:10,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:24:10,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:24:10,381 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:24:10,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 02:24:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:10,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:24:10,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:24:10,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:10,469 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 [2021-11-23 02:24:10,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:10,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 02:24:10,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:10,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 02:24:10,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:10,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 02:24:10,670 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 [2021-11-23 02:24:10,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-23 02:24:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:24:10,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:24:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:24:10,920 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:24:10,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786627074] [2021-11-23 02:24:10,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786627074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:24:10,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2036728950] [2021-11-23 02:24:10,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:10,923 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:24:10,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:24:10,928 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:24:10,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 02:24:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:11,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:24:11,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:24:11,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:11,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 02:24:11,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:11,078 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 [2021-11-23 02:24:11,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:11,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 02:24:11,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:11,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 02:24:11,245 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 [2021-11-23 02:24:11,250 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 [2021-11-23 02:24:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:24:11,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:24:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:24:11,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2036728950] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:24:11,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235525727] [2021-11-23 02:24:11,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:11,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:24:11,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:24:11,424 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:24:11,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:24:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:11,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:24:11,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:24:11,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:11,489 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 [2021-11-23 02:24:11,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:11,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 02:24:11,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:11,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 02:24:11,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:11,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 02:24:11,652 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 [2021-11-23 02:24:11,656 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 [2021-11-23 02:24:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:24:11,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:24:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:24:11,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235525727] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:24:11,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:24:11,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 7 [2021-11-23 02:24:11,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802737632] [2021-11-23 02:24:11,840 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:24:11,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:24:11,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:24:11,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:24:11,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:24:11,843 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) [2021-11-23 02:24:12,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:12,481 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2021-11-23 02:24:12,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:24:12,481 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 [2021-11-23 02:24:12,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:12,484 INFO L225 Difference]: With dead ends: 68 [2021-11-23 02:24:12,484 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 02:24:12,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:24:12,488 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:12,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 77 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:24:12,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 02:24:12,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2021-11-23 02:24:12,496 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) [2021-11-23 02:24:12,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 74 transitions. [2021-11-23 02:24:12,497 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 74 transitions. Word has length 15 [2021-11-23 02:24:12,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:12,498 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 74 transitions. [2021-11-23 02:24:12,498 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) [2021-11-23 02:24:12,498 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 74 transitions. [2021-11-23 02:24:12,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 02:24:12,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:12,499 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:12,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:24:12,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-23 02:24:12,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:24:13,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:24:13,128 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:13,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:13,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1000926759, now seen corresponding path program 2 times [2021-11-23 02:24:13,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:24:13,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630811821] [2021-11-23 02:24:13,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:24:13,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:24:13,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:24:13,130 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:24:13,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 02:24:13,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:24:13,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:24:13,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:24:13,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:24:13,251 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 [2021-11-23 02:24:13,265 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 [2021-11-23 02:24:13,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:13,572 INFO L354 Elim1Store]: treesize reduction 118, result has 33.7 percent of original size [2021-11-23 02:24:13,573 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 [2021-11-23 02:24:13,624 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:24:13,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-23 02:24:13,814 INFO L354 Elim1Store]: treesize reduction 54, result has 31.6 percent of original size [2021-11-23 02:24:13,815 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 [2021-11-23 02:24:13,919 INFO L354 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2021-11-23 02:24:13,919 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 [2021-11-23 02:24:14,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:24:14,274 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 37 [2021-11-23 02:24:14,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:24:14,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:24:16,510 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_39| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_23)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_39| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_39|) (_ bv4 32) v_DerPreprocessor_22) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) is different from false [2021-11-23 02:24:18,975 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_39| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_21| (_ BitVec 32)) (v_DerPreprocessor_24 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_39| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_22| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_16| (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32))) (or (bvslt |v_ULTIMATE.start_main_~x~0#1_16| (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_21|))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_25)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_21| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_21|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_39|) v_DerPreprocessor_24) |v_ULTIMATE.start_main_~p~0#1.offset_39| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_22| (_ bv4 32)) v_DerPreprocessor_23))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_39| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_39|) (_ bv4 32) v_DerPreprocessor_22) (_ bv0 32) |v_ULTIMATE.start_main_~x~0#1_16|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvsgt |v_ULTIMATE.start_main_~x~0#1_16| (_ bv20 32)))) is different from false [2021-11-23 02:24:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-23 02:24:19,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:24:19,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630811821] [2021-11-23 02:24:19,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1630811821] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:24:19,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1547802640] [2021-11-23 02:24:19,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:24:19,583 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:24:19,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:24:19,588 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:24:19,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 02:24:19,706 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:24:19,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915382137] [2021-11-23 02:24:19,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:24:19,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:24:19,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:24:19,713 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:24:19,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 1 [2021-11-23 02:24:19,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:24:19,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:24:19,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:24:19,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 02:24:19,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:24:19,894 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 [2021-11-23 02:24:19,903 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 [2021-11-23 02:24:20,035 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:24:20,035 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 [2021-11-23 02:24:20,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:20,095 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-23 02:24:20,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2021-11-23 02:24:20,390 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-23 02:24:20,391 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 [2021-11-23 02:24:20,425 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 02:24:20,425 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 [2021-11-23 02:24:20,536 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 [2021-11-23 02:24:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:24:20,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:24:22,647 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_42| (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_30 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_43| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_31)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_43| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_43|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_42|) v_DerPreprocessor_30) |v_ULTIMATE.start_main_~p~0#1.offset_42| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_43|))))))))) is different from false [2021-11-23 02:24:25,020 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_42| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_20| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_28| (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_32 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_43| (_ BitVec 32)) (v_DerPreprocessor_30 (_ BitVec 32)) (v_DerPreprocessor_33 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_26| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_43| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_33)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_26| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_26|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_43|) v_DerPreprocessor_32) |v_ULTIMATE.start_main_~p~0#1.offset_43| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_28| (_ bv4 32)) v_DerPreprocessor_31))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_43| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_43|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_42|) v_DerPreprocessor_30) |v_ULTIMATE.start_main_~p~0#1.offset_42| |v_ULTIMATE.start_main_~x~0#1_20|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_26| (_ bv1 1)) |v_ULTIMATE.start_main_~p~0#1.base_43|)))))))) (_ bv0 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_26|)))))) is different from false [2021-11-23 02:24:27,245 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_42| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_20| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_28| (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_32 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_43| (_ BitVec 32)) (v_DerPreprocessor_30 (_ BitVec 32)) (v_DerPreprocessor_33 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_26| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_43| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_26| (_ bv1 1)) |v_ULTIMATE.start_main_~p~0#1.base_43|))))))))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_33)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_26| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_26|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_43|) v_DerPreprocessor_32) |v_ULTIMATE.start_main_~p~0#1.offset_43| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_28| (_ bv4 32)) v_DerPreprocessor_31))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_43| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_43|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_42|) v_DerPreprocessor_30) |v_ULTIMATE.start_main_~p~0#1.offset_42| |v_ULTIMATE.start_main_~x~0#1_20|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_26|)))))) is different from false [2021-11-23 02:24:27,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-23 02:24:27,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915382137] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:24:27,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-23 02:24:27,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 8] total 17 [2021-11-23 02:24:27,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024860250] [2021-11-23 02:24:27,493 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-23 02:24:27,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 02:24:27,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:24:27,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 02:24:27,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=100, Unknown=5, NotChecked=120, Total=272 [2021-11-23 02:24:27,496 INFO L87 Difference]: Start difference. First operand 52 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-11-23 02:24:29,964 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_42| (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_30 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_43| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_31)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_43| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_43|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_42|) v_DerPreprocessor_30) |v_ULTIMATE.start_main_~p~0#1.offset_42| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_43|))))))))) (forall ((|v_ULTIMATE.start_main_~p~0#1.base_39| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_23)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_39| (store (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_39|) (_ bv4 32) v_DerPreprocessor_22) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (exists ((v_arrayElimCell_35 (_ BitVec 1))) (let ((.cse2 (bvneg (bvneg v_arrayElimCell_35)))) (and (= (_ bv0 1) (bvadd (bvneg .cse2) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse2 (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~list~0#1.base|))))))) (bvsge (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset|) (_ bv10 32)) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ULTIMATE.start_main_~tail~0#1.base|))) (= |c_ULTIMATE.start_main_~list~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~list~0#1.base| |c_ULTIMATE.start_main_~tail~0#1.base|))) is different from false [2021-11-23 02:24:32,030 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_42| (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_30 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_43| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_31)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_43| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_43|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_42|) v_DerPreprocessor_30) |v_ULTIMATE.start_main_~p~0#1.offset_42| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_43|))))))))) (forall ((|v_ULTIMATE.start_main_~p~0#1.base_39| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_23)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_39| (store (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_39|) (_ bv4 32) v_DerPreprocessor_22) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (exists ((v_arrayElimCell_35 (_ BitVec 1))) (let ((.cse2 (bvneg (bvneg v_arrayElimCell_35)))) (and (= (_ bv0 1) (bvadd (bvneg .cse2) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse2 (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~list~0#1.base|))))))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ULTIMATE.start_main_~tail~0#1.base|))) (= |c_ULTIMATE.start_main_~list~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~list~0#1.base| |c_ULTIMATE.start_main_~tail~0#1.base|))) is different from false [2021-11-23 02:24:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:32,588 INFO L93 Difference]: Finished difference Result 75 states and 108 transitions. [2021-11-23 02:24:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:24:32,588 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 [2021-11-23 02:24:32,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:32,589 INFO L225 Difference]: With dead ends: 75 [2021-11-23 02:24:32,589 INFO L226 Difference]: Without dead ends: 66 [2021-11-23 02:24:32,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=121, Invalid=242, Unknown=7, NotChecked=280, Total=650 [2021-11-23 02:24:32,591 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:32,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 119 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 70 Invalid, 0 Unknown, 199 Unchecked, 0.6s Time] [2021-11-23 02:24:32,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-23 02:24:32,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-11-23 02:24:32,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.4745762711864407) internal successors, (87), 59 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:24:32,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2021-11-23 02:24:32,603 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 15 [2021-11-23 02:24:32,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:32,603 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2021-11-23 02:24:32,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-11-23 02:24:32,604 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2021-11-23 02:24:32,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 02:24:32,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:32,605 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:32,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:24:32,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:24:33,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:24:33,018 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:33,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:33,018 INFO L85 PathProgramCache]: Analyzing trace with hash 680874398, now seen corresponding path program 1 times [2021-11-23 02:24:33,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:24:33,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283988638] [2021-11-23 02:24:33,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:33,019 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:24:33,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:24:33,020 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:24:33,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 02:24:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:33,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:24:33,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:24:33,087 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 [2021-11-23 02:24:33,216 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 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 02:24:33,280 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 [2021-11-23 02:24:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:24:33,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:24:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:24:33,536 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:24:33,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283988638] [2021-11-23 02:24:33,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283988638] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:24:33,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [433842343] [2021-11-23 02:24:33,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:33,537 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:24:33,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:24:33,544 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:24:33,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 02:24:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:33,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:24:33,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:24:33,654 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 [2021-11-23 02:24:33,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 02:24:34,054 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 [2021-11-23 02:24:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:24:34,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:24:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:24:34,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [433842343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:24:34,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466718028] [2021-11-23 02:24:34,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:34,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:24:34,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:24:34,491 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:24:34,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 02:24:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:34,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:24:34,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:24:34,545 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 [2021-11-23 02:24:34,652 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 25 treesize of output 13 [2021-11-23 02:24:34,685 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 [2021-11-23 02:24:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:24:34,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:24:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:24:34,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466718028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:24:34,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:24:34,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 10, 7, 7] total 20 [2021-11-23 02:24:34,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929342636] [2021-11-23 02:24:34,776 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:24:34,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 02:24:34,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:24:34,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 02:24:34,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:24:34,778 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 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) [2021-11-23 02:24:37,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:37,218 INFO L93 Difference]: Finished difference Result 135 states and 189 transitions. [2021-11-23 02:24:37,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 02:24:37,219 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 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 17 [2021-11-23 02:24:37,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:37,222 INFO L225 Difference]: With dead ends: 135 [2021-11-23 02:24:37,223 INFO L226 Difference]: Without dead ends: 118 [2021-11-23 02:24:37,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=262, Invalid=608, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:24:37,224 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 132 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:37,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 113 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-23 02:24:37,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-23 02:24:37,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 96. [2021-11-23 02:24:37,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.4736842105263157) internal successors, (140), 95 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:24:37,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 140 transitions. [2021-11-23 02:24:37,243 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 140 transitions. Word has length 17 [2021-11-23 02:24:37,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:37,243 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 140 transitions. [2021-11-23 02:24:37,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 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) [2021-11-23 02:24:37,244 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 140 transitions. [2021-11-23 02:24:37,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 02:24:37,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:37,246 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:37,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:24:37,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:24:37,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:24:37,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:24:37,848 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:37,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:37,848 INFO L85 PathProgramCache]: Analyzing trace with hash -128474150, now seen corresponding path program 1 times [2021-11-23 02:24:37,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:24:37,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759015028] [2021-11-23 02:24:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:37,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:24:37,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:24:37,850 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:24:37,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 02:24:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:37,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:24:37,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:24:37,910 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 [2021-11-23 02:24:37,972 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 [2021-11-23 02:24:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:24:38,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:24:38,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:24:38,116 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:24:38,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759015028] [2021-11-23 02:24:38,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759015028] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:24:38,116 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:24:38,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-23 02:24:38,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568750725] [2021-11-23 02:24:38,117 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:24:38,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:24:38,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:24:38,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:24:38,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:24:38,118 INFO L87 Difference]: Start difference. First operand 96 states and 140 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) [2021-11-23 02:24:38,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:38,685 INFO L93 Difference]: Finished difference Result 127 states and 182 transitions. [2021-11-23 02:24:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:24:38,687 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 [2021-11-23 02:24:38,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:38,689 INFO L225 Difference]: With dead ends: 127 [2021-11-23 02:24:38,689 INFO L226 Difference]: Without dead ends: 98 [2021-11-23 02:24:38,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:24:38,690 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:38,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 67 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:24:38,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-23 02:24:38,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-11-23 02:24:38,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.4526315789473685) internal successors, (138), 95 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:24:38,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 138 transitions. [2021-11-23 02:24:38,703 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 138 transitions. Word has length 17 [2021-11-23 02:24:38,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:38,704 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 138 transitions. [2021-11-23 02:24:38,704 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) [2021-11-23 02:24:38,704 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 138 transitions. [2021-11-23 02:24:38,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 02:24:38,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:38,705 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:38,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:24:38,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:24:38,917 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:38,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:38,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1524987734, now seen corresponding path program 1 times [2021-11-23 02:24:38,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:24:38,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841150563] [2021-11-23 02:24:38,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:38,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:24:38,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:24:38,919 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:24:38,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 02:24:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:39,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:24:39,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:24:39,041 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:24:39,049 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 [2021-11-23 02:24:39,153 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:24:39,153 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 [2021-11-23 02:24:39,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:39,201 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-23 02:24:39,201 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 [2021-11-23 02:24:39,409 INFO L354 Elim1Store]: treesize reduction 54, result has 31.6 percent of original size [2021-11-23 02:24:39,409 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 [2021-11-23 02:24:39,512 INFO L354 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2021-11-23 02:24:39,512 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 [2021-11-23 02:24:39,844 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 22 [2021-11-23 02:24:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:24:39,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:24:42,047 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_64| (_ BitVec 32)) (v_DerPreprocessor_37 (_ BitVec 32)) (v_DerPreprocessor_38 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_38)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_64| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_64|) (_ bv4 32) v_DerPreprocessor_37) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) is different from false [2021-11-23 02:24:44,517 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_63| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_38| (_ BitVec 32)) (v_DerPreprocessor_40 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_35| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_29| (_ BitVec 32)) (v_DerPreprocessor_39 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_64| (_ BitVec 32)) (v_DerPreprocessor_37 (_ BitVec 32)) (v_DerPreprocessor_38 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_40)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_35| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_35|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_63|) v_DerPreprocessor_39) |v_ULTIMATE.start_main_~p~0#1.offset_63| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_38| (_ bv4 32)) v_DerPreprocessor_38))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_64| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_64|) (_ bv4 32) v_DerPreprocessor_37) (_ bv0 32) |v_ULTIMATE.start_main_~x~0#1_29|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_35|))))))) (bvslt |v_ULTIMATE.start_main_~x~0#1_29| (_ bv10 32)) (bvsgt |v_ULTIMATE.start_main_~x~0#1_29| (_ bv20 32)))) is different from false [2021-11-23 02:24:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2021-11-23 02:24:45,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:24:45,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841150563] [2021-11-23 02:24:45,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841150563] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:24:45,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2037960034] [2021-11-23 02:24:45,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:45,048 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:24:45,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:24:45,060 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:24:45,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 02:24:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:45,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:24:45,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:24:45,265 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 [2021-11-23 02:24:45,274 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 [2021-11-23 02:24:45,379 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:24:45,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-23 02:24:45,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:45,425 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-23 02:24:45,426 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 [2021-11-23 02:24:45,572 INFO L354 Elim1Store]: treesize reduction 54, result has 31.6 percent of original size [2021-11-23 02:24:45,572 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 [2021-11-23 02:24:45,646 INFO L354 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2021-11-23 02:24:45,647 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 [2021-11-23 02:24:45,881 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 [2021-11-23 02:24:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:24:45,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:24:47,981 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_69| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_44 (_ BitVec 32)) (v_DerPreprocessor_45 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_45)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_69| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_69|) (_ bv4 32) v_DerPreprocessor_44) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) is different from false [2021-11-23 02:24:50,513 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_69| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_67| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_40| (_ BitVec 32)) (v_DerPreprocessor_46 (_ BitVec 32)) (v_DerPreprocessor_47 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_44| (_ BitVec 32)) (v_DerPreprocessor_44 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (v_DerPreprocessor_45 (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_34| (_ BitVec 32))) (or (bvslt |v_ULTIMATE.start_main_~x~0#1_34| (_ bv10 32)) (bvsgt |v_ULTIMATE.start_main_~x~0#1_34| (_ bv20 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_40|))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_47)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_40| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_40|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_67|) v_DerPreprocessor_46) |v_ULTIMATE.start_main_~p~0#1.offset_67| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_44| (_ bv4 32)) v_DerPreprocessor_45))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_69| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_69|) (_ bv4 32) v_DerPreprocessor_44) (_ bv0 32) |v_ULTIMATE.start_main_~x~0#1_34|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)))) is different from false [2021-11-23 02:24:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2021-11-23 02:24:50,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2037960034] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:24:50,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201588452] [2021-11-23 02:24:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:50,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:24:50,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:24:50,980 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:24:50,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 02:24:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:51,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 02:24:51,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:24:51,068 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 [2021-11-23 02:24:51,080 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 [2021-11-23 02:24:51,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:51,314 INFO L354 Elim1Store]: treesize reduction 118, result has 33.7 percent of original size [2021-11-23 02:24:51,315 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 [2021-11-23 02:24:51,378 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:24:51,378 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 [2021-11-23 02:24:51,729 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-23 02:24:51,729 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 81 treesize of output 73 [2021-11-23 02:24:51,778 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 02:24:51,779 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 45 treesize of output 47 [2021-11-23 02:24:51,916 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 [2021-11-23 02:24:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:24:51,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:24:54,023 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_53 (_ BitVec 32)) (v_DerPreprocessor_52 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_73| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_70| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_53)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_73| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_73|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_70|) v_DerPreprocessor_52) |v_ULTIMATE.start_main_~p~0#1.offset_70| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_73|)))))) is different from false [2021-11-23 02:24:56,361 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_53 (_ BitVec 32)) (v_DerPreprocessor_54 (_ BitVec 32)) (v_DerPreprocessor_52 (_ BitVec 32)) (v_DerPreprocessor_55 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_45| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_73| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_39| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_50| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_70| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_71| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_45|))))) (not (= (_ bv0 1) (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_45| (_ bv1 1)) |v_ULTIMATE.start_main_~p~0#1.base_73|))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_55)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_45| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_45|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_71|) v_DerPreprocessor_54) |v_ULTIMATE.start_main_~p~0#1.offset_71| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_50| (_ bv4 32)) v_DerPreprocessor_53))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_73| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_73|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_70|) v_DerPreprocessor_52) |v_ULTIMATE.start_main_~p~0#1.offset_70| |v_ULTIMATE.start_main_~x~0#1_39|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)))) is different from false [2021-11-23 02:24:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2021-11-23 02:24:56,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201588452] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:24:56,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:24:56,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 18 [2021-11-23 02:24:56,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049676769] [2021-11-23 02:24:56,719 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:24:56,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 02:24:56,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:24:56,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 02:24:56,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=101, Unknown=6, NotChecked=150, Total=306 [2021-11-23 02:24:56,720 INFO L87 Difference]: Start difference. First operand 96 states and 138 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) [2021-11-23 02:24:59,101 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (_ bv0 32)))) (and (forall ((|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_64| (_ BitVec 32)) (v_DerPreprocessor_37 (_ BitVec 32)) (v_DerPreprocessor_38 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_38)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_64| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_64|) (_ bv4 32) v_DerPreprocessor_37) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) (not (bvslt .cse1 (_ bv10 32))) (forall ((v_DerPreprocessor_53 (_ BitVec 32)) (v_DerPreprocessor_52 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_73| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_70| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_53)))) (store .cse2 |v_ULTIMATE.start_main_~p~0#1.base_73| (store (store (select .cse2 |v_ULTIMATE.start_main_~p~0#1.base_73|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_70|) v_DerPreprocessor_52) |v_ULTIMATE.start_main_~p~0#1.offset_70| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_73|)))))) (= |c_ULTIMATE.start_main_~p~0#1.offset| (_ bv0 32)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ULTIMATE.start_main_~tail~0#1.base|))) (= |c_ULTIMATE.start_main_~list~0#1.offset| (_ bv0 32)) (exists ((v_arrayElimCell_65 (_ BitVec 1))) (let ((.cse3 (bvneg v_arrayElimCell_65))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg .cse3))) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse3 (select |c_#valid| |c_ULTIMATE.start_main_~list~0#1.base|)))))) (not (bvsgt .cse1 (_ bv20 32))) (not (= |c_ULTIMATE.start_main_~list~0#1.base| |c_ULTIMATE.start_main_~tail~0#1.base|)) (forall ((|v_ULTIMATE.start_main_~p~0#1.base_69| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_44 (_ BitVec 32)) (v_DerPreprocessor_45 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsge (select (select (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_45)))) (store .cse4 |v_ULTIMATE.start_main_~p~0#1.base_69| (store (store (select .cse4 |v_ULTIMATE.start_main_~p~0#1.base_69|) (_ bv4 32) v_DerPreprocessor_44) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))))) is different from false [2021-11-23 02:25:01,163 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_64| (_ BitVec 32)) (v_DerPreprocessor_37 (_ BitVec 32)) (v_DerPreprocessor_38 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_38)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_64| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_64|) (_ bv4 32) v_DerPreprocessor_37) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) (forall ((v_DerPreprocessor_53 (_ BitVec 32)) (v_DerPreprocessor_52 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_73| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_70| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_53)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_73| (store (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_73|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_70|) v_DerPreprocessor_52) |v_ULTIMATE.start_main_~p~0#1.offset_70| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_73|)))))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ULTIMATE.start_main_~tail~0#1.base|))) (= |c_ULTIMATE.start_main_~list~0#1.offset| (_ bv0 32)) (exists ((v_arrayElimCell_65 (_ BitVec 1))) (let ((.cse2 (bvneg v_arrayElimCell_65))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg .cse2))) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse2 (select |c_#valid| |c_ULTIMATE.start_main_~list~0#1.base|)))))) (not (= |c_ULTIMATE.start_main_~list~0#1.base| |c_ULTIMATE.start_main_~tail~0#1.base|)) (forall ((|v_ULTIMATE.start_main_~p~0#1.base_69| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_44 (_ BitVec 32)) (v_DerPreprocessor_45 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsge (select (select (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_45)))) (store .cse3 |v_ULTIMATE.start_main_~p~0#1.base_69| (store (store (select .cse3 |v_ULTIMATE.start_main_~p~0#1.base_69|) (_ bv4 32) v_DerPreprocessor_44) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32))))) is different from false [2021-11-23 02:25:01,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:25:01,827 INFO L93 Difference]: Finished difference Result 160 states and 230 transitions. [2021-11-23 02:25:01,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 02:25:01,834 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 [2021-11-23 02:25:01,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:25:01,836 INFO L225 Difference]: With dead ends: 160 [2021-11-23 02:25:01,836 INFO L226 Difference]: Without dead ends: 136 [2021-11-23 02:25:01,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=120, Invalid=246, Unknown=8, NotChecked=328, Total=702 [2021-11-23 02:25:01,837 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:25:01,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 106 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 92 Invalid, 0 Unknown, 255 Unchecked, 0.8s Time] [2021-11-23 02:25:01,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-23 02:25:01,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 91. [2021-11-23 02:25:01,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.4444444444444444) internal successors, (130), 90 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:25:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 130 transitions. [2021-11-23 02:25:01,859 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 130 transitions. Word has length 17 [2021-11-23 02:25:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:25:01,859 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 130 transitions. [2021-11-23 02:25:01,859 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) [2021-11-23 02:25:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 130 transitions. [2021-11-23 02:25:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 02:25:01,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:25:01,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:25:01,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 02:25:02,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-23 02:25:02,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 02:25:02,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:25:02,488 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:25:02,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:25:02,488 INFO L85 PathProgramCache]: Analyzing trace with hash -668283619, now seen corresponding path program 1 times [2021-11-23 02:25:02,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:25:02,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069378886] [2021-11-23 02:25:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:02,489 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:25:02,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:25:02,490 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:25:02,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 02:25:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:02,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:25:02,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:25:02,587 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 [2021-11-23 02:25:02,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:25:02,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:25:02,727 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 02:25:02,728 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 114 treesize of output 92 [2021-11-23 02:25:02,732 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 125 treesize of output 115 [2021-11-23 02:25:02,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:25:02,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:25:02,765 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-23 02:25:02,765 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 122 treesize of output 88 [2021-11-23 02:25:02,779 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-23 02:25:02,779 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 88 treesize of output 88 [2021-11-23 02:25:03,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:25:03,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:25:03,138 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:25:03,138 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 121 treesize of output 91 [2021-11-23 02:25:03,169 INFO L354 Elim1Store]: treesize reduction 51, result has 20.3 percent of original size [2021-11-23 02:25:03,170 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 106 treesize of output 91 [2021-11-23 02:25:03,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:25:03,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:25:03,182 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 02:25:03,182 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 89 treesize of output 80 [2021-11-23 02:25:03,224 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:25:03,225 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 [2021-11-23 02:25:03,230 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:25:03,230 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 [2021-11-23 02:25:03,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-11-23 02:25:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:25:03,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:25:03,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:25:03,734 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 348 treesize of output 347 [2021-11-23 02:25:03,976 INFO L354 Elim1Store]: treesize reduction 51, result has 48.5 percent of original size [2021-11-23 02:25:03,976 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 525 treesize of output 355 [2021-11-23 02:25:04,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:25:04,067 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 347 treesize of output 353 [2021-11-23 02:25:04,187 INFO L354 Elim1Store]: treesize reduction 60, result has 39.4 percent of original size [2021-11-23 02:25:04,187 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 531 treesize of output 352 [2021-11-23 02:25:04,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:25:04,242 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 344 treesize of output 350 [2021-11-23 02:25:04,775 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 [2021-11-23 02:25:04,859 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 02:25:04,860 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 15 treesize of output 9 [2021-11-23 02:25:05,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:25:05,206 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 [2021-11-23 02:25:05,293 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 [2021-11-23 02:25:10,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:25:10,387 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 82 treesize of output 102 [2021-11-23 02:25:11,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:25:11,325 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 117 treesize of output 137 [2021-11-23 02:25:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:25:12,681 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:25:12,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069378886] [2021-11-23 02:25:12,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069378886] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:25:12,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1638263875] [2021-11-23 02:25:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:12,681 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:25:12,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:25:12,683 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:25:12,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 02:25:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:12,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 02:25:12,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:25:12,819 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 [2021-11-23 02:25:13,012 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-23 02:25:13,012 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 [2021-11-23 02:25:13,018 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 126 treesize of output 116 [2021-11-23 02:25:13,068 INFO L354 Elim1Store]: treesize reduction 150, result has 14.3 percent of original size [2021-11-23 02:25:13,069 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 123 treesize of output 89 [2021-11-23 02:25:13,083 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-23 02:25:13,084 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 [2021-11-23 02:25:13,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:25:13,556 INFO L354 Elim1Store]: treesize reduction 75, result has 16.7 percent of original size [2021-11-23 02:25:13,556 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 140 treesize of output 110 [2021-11-23 02:25:13,582 INFO L354 Elim1Store]: treesize reduction 87, result has 17.9 percent of original size [2021-11-23 02:25:13,583 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 [2021-11-23 02:25:13,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:25:13,607 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-23 02:25:13,608 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 108 treesize of output 84 [2021-11-23 02:25:13,652 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-23 02:25:13,652 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 [2021-11-23 02:25:13,658 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 02:25:13,658 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 [2021-11-23 02:25:13,719 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 [2021-11-23 02:25:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:25:13,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:25:13,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:25:13,986 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 658 treesize of output 627 [2021-11-23 02:25:18,699 INFO L354 Elim1Store]: treesize reduction 78, result has 39.1 percent of original size [2021-11-23 02:25:18,700 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 1081 treesize of output 635 [2021-11-23 02:25:20,502 INFO L354 Elim1Store]: treesize reduction 78, result has 39.1 percent of original size [2021-11-23 02:25:20,503 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 1081 treesize of output 635 [2021-11-23 02:25:20,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:25:20,559 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 627 treesize of output 617 [2021-11-23 02:25:20,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:25:20,619 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 617 treesize of output 607 [2021-11-23 02:25:20,789 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 [2021-11-23 02:25:21,000 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 [2021-11-23 02:25:21,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:25:21,385 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 [2021-11-23 02:25:21,486 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 [2021-11-23 02:25:22,901 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 [2021-11-23 02:25:23,217 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 [2021-11-23 02:25:23,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:25:23,291 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 [2021-11-23 02:25:26,133 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-23 02:25:26,179 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 [2021-11-23 02:25:26,298 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 [2021-11-23 02:25:27,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:25:27,021 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 539 treesize of output 527 [2021-11-23 02:25:27,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:25:27,077 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 657 treesize of output 645 [2021-11-23 02:25:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:25:29,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1638263875] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:25:29,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586955497] [2021-11-23 02:25:29,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:29,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:25:29,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:25:29,467 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:25:29,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 02:25:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:29,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 02:25:29,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:25:29,527 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 [2021-11-23 02:25:29,780 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-23 02:25:29,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 96 [2021-11-23 02:25:29,788 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 117 treesize of output 113 [2021-11-23 02:25:29,860 INFO L354 Elim1Store]: treesize reduction 174, result has 12.6 percent of original size [2021-11-23 02:25:29,860 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 120 treesize of output 86 [2021-11-23 02:25:29,881 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-23 02:25:29,881 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 107 treesize of output 107 [2021-11-23 02:25:30,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:25:30,282 INFO L354 Elim1Store]: treesize reduction 75, result has 16.7 percent of original size [2021-11-23 02:25:30,283 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 140 treesize of output 110 [2021-11-23 02:25:30,310 INFO L354 Elim1Store]: treesize reduction 87, result has 17.9 percent of original size [2021-11-23 02:25:30,310 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 [2021-11-23 02:25:30,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:25:30,336 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-23 02:25:30,336 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 108 treesize of output 84 [2021-11-23 02:25:30,381 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-23 02:25:30,381 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 [2021-11-23 02:25:30,388 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 02:25:30,388 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 [2021-11-23 02:25:30,411 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 [2021-11-23 02:25:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:25:30,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:25:30,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:25:30,695 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 659 treesize of output 628 [2021-11-23 02:25:32,152 INFO L354 Elim1Store]: treesize reduction 78, result has 39.1 percent of original size [2021-11-23 02:25:32,152 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 1082 treesize of output 636 [2021-11-23 02:25:36,301 INFO L354 Elim1Store]: treesize reduction 78, result has 39.1 percent of original size [2021-11-23 02:25:36,302 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 1082 treesize of output 636 [2021-11-23 02:25:36,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:25:36,362 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 628 treesize of output 618 [2021-11-23 02:25:36,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:25:36,435 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 618 treesize of output 608 [2021-11-23 02:25:36,537 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 [2021-11-23 02:25:36,810 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 [2021-11-23 02:25:37,084 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 [2021-11-23 02:25:37,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:25:37,222 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 42 treesize of output 46 [2021-11-23 02:25:37,594 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 [2021-11-23 02:25:37,732 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 [2021-11-23 02:25:37,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:25:37,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-23 02:28:04,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:28:04,440 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 214 treesize of output 222 [2021-11-23 02:28:08,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:28:08,285 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 202 treesize of output 214 [2021-11-23 02:28:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:28:11,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586955497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:11,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:28:11,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7, 8, 7, 8] total 16 [2021-11-23 02:28:11,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063719246] [2021-11-23 02:28:11,103 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:28:11,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 02:28:11,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:28:11,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 02:28:11,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:28:11,106 INFO L87 Difference]: Start difference. First operand 91 states and 130 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:28:12,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:12,421 INFO L93 Difference]: Finished difference Result 136 states and 193 transitions. [2021-11-23 02:28:12,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:28:12,422 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 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 [2021-11-23 02:28:12,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:12,423 INFO L225 Difference]: With dead ends: 136 [2021-11-23 02:28:12,423 INFO L226 Difference]: Without dead ends: 112 [2021-11-23 02:28:12,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:28:12,424 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 38 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:12,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 156 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 177 Invalid, 0 Unknown, 77 Unchecked, 1.1s Time] [2021-11-23 02:28:12,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-23 02:28:12,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 102. [2021-11-23 02:28:12,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.4356435643564356) internal successors, (145), 101 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:28:12,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 145 transitions. [2021-11-23 02:28:12,436 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 145 transitions. Word has length 18 [2021-11-23 02:28:12,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:12,437 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 145 transitions. [2021-11-23 02:28:12,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:28:12,437 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 145 transitions. [2021-11-23 02:28:12,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 02:28:12,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:12,438 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:12,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:12,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:12,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:13,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:13,052 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:13,052 INFO L85 PathProgramCache]: Analyzing trace with hash -776135564, now seen corresponding path program 3 times [2021-11-23 02:28:13,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:28:13,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466473961] [2021-11-23 02:28:13,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:28:13,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:28:13,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:28:13,054 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:28:13,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 02:28:13,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 02:28:13,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:28:13,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 02:28:13,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:13,178 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 [2021-11-23 02:28:13,185 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 [2021-11-23 02:28:13,292 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:28:13,292 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 [2021-11-23 02:28:13,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:13,343 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-23 02:28:13,343 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 [2021-11-23 02:28:13,580 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-23 02:28:13,580 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 79 treesize of output 71 [2021-11-23 02:28:13,609 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 02:28:13,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 45 [2021-11-23 02:28:13,755 INFO L354 Elim1Store]: treesize reduction 54, result has 31.6 percent of original size [2021-11-23 02:28:13,756 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 [2021-11-23 02:28:13,833 INFO L354 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2021-11-23 02:28:13,834 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 [2021-11-23 02:28:14,091 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 [2021-11-23 02:28:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:28:14,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:16,258 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_73 (_ BitVec 32)) (v_DerPreprocessor_74 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_93| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_74)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_93| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_93|) (_ bv4 32) v_DerPreprocessor_73) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) is different from false [2021-11-23 02:28:18,560 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~tail~0#1.base_60| (_ BitVec 32)) (v_DerPreprocessor_75 (_ BitVec 32)) (v_DerPreprocessor_76 (_ BitVec 32)) (v_DerPreprocessor_73 (_ BitVec 32)) (v_DerPreprocessor_74 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_93| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_66| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_49| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_90| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_60|))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_76)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_60| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_60|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_90|) v_DerPreprocessor_75) |v_ULTIMATE.start_main_~p~0#1.offset_90| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_66| (_ bv4 32)) v_DerPreprocessor_74))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_93| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_93|) (_ bv4 32) v_DerPreprocessor_73) (_ bv0 32) |v_ULTIMATE.start_main_~x~0#1_49|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvslt |v_ULTIMATE.start_main_~x~0#1_49| (_ bv10 32)) (bvsgt |v_ULTIMATE.start_main_~x~0#1_49| (_ bv20 32)))) is different from false [2021-11-23 02:28:21,743 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~tail~0#1.offset_68| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_93| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_66| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_49| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_51| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_60| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_61| (_ BitVec 32)) (v_DerPreprocessor_75 (_ BitVec 32)) (v_DerPreprocessor_76 (_ BitVec 32)) (v_DerPreprocessor_73 (_ BitVec 32)) (v_DerPreprocessor_74 (_ BitVec 32)) (v_DerPreprocessor_77 (_ BitVec 32)) (v_DerPreprocessor_78 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_90| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_91| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_61|)))) (bvslt |v_ULTIMATE.start_main_~x~0#1_49| (_ bv10 32)) (bvsgt |v_ULTIMATE.start_main_~x~0#1_49| (_ bv20 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_61| (_ bv1 1)) |v_ULTIMATE.start_main_~tail~0#1.base_60|))))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_78)))) (store .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_61| (store (store (store (select .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_61|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_91|) v_DerPreprocessor_77) |v_ULTIMATE.start_main_~p~0#1.offset_91| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_68| (_ bv4 32)) v_DerPreprocessor_76))))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_60| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_60|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_90|) v_DerPreprocessor_75) |v_ULTIMATE.start_main_~p~0#1.offset_90| |v_ULTIMATE.start_main_~x~0#1_51|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_66| (_ bv4 32)) v_DerPreprocessor_74))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_93| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_93|) (_ bv4 32) v_DerPreprocessor_73) (_ bv0 32) |v_ULTIMATE.start_main_~x~0#1_49|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)))) is different from false [2021-11-23 02:28:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2021-11-23 02:28:23,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:28:23,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466473961] [2021-11-23 02:28:23,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466473961] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:23,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2017410177] [2021-11-23 02:28:23,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:28:23,112 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:28:23,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:28:23,113 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:28:23,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-23 02:28:23,238 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:28:23,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769651931] [2021-11-23 02:28:23,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:28:23,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:23,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:28:23,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 1 [2021-11-23 02:28:23,246 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:28:23,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 02:28:24,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 02:28:24,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:28:24,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 02:28:24,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:24,059 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 [2021-11-23 02:28:24,066 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 [2021-11-23 02:28:24,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:24,293 INFO L354 Elim1Store]: treesize reduction 118, result has 33.7 percent of original size [2021-11-23 02:28:24,293 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 [2021-11-23 02:28:24,362 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:28:24,363 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 [2021-11-23 02:28:24,572 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-23 02:28:24,573 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 86 treesize of output 78 [2021-11-23 02:28:24,628 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-23 02:28:24,629 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 50 treesize of output 67 [2021-11-23 02:28:25,017 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-23 02:28:25,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 102 [2021-11-23 02:28:25,063 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-23 02:28:25,063 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 74 treesize of output 78 [2021-11-23 02:28:25,170 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 [2021-11-23 02:28:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:28:25,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:27,273 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_94| (_ BitVec 32)) (v_DerPreprocessor_86 (_ BitVec 32)) (v_DerPreprocessor_85 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_98| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_98|)))) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_86)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_98| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_98|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_94|) v_DerPreprocessor_85) |v_ULTIMATE.start_main_~p~0#1.offset_94| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)))) is different from false [2021-11-23 02:28:29,580 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_94| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_95| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_75| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_55| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_98| (_ BitVec 32)) (v_DerPreprocessor_86 (_ BitVec 32)) (v_DerPreprocessor_87 (_ BitVec 32)) (v_DerPreprocessor_85 (_ BitVec 32)) (v_DerPreprocessor_88 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_67| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_67| (_ bv1 1)) |v_ULTIMATE.start_main_~p~0#1.base_98|)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_67|)))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_88)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_67| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_67|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_95|) v_DerPreprocessor_87) |v_ULTIMATE.start_main_~p~0#1.offset_95| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_75| (_ bv4 32)) v_DerPreprocessor_86))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_98| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_98|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_94|) v_DerPreprocessor_85) |v_ULTIMATE.start_main_~p~0#1.offset_94| |v_ULTIMATE.start_main_~x~0#1_55|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)))) is different from false [2021-11-23 02:28:32,441 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_96| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_94| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_95| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_77| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_75| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_55| (_ BitVec 32)) (v_DerPreprocessor_90 (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_57| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_98| (_ BitVec 32)) (v_DerPreprocessor_86 (_ BitVec 32)) (v_DerPreprocessor_87 (_ BitVec 32)) (v_DerPreprocessor_85 (_ BitVec 32)) (v_DerPreprocessor_88 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_67| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_68| (_ BitVec 32)) (v_DerPreprocessor_89 (_ BitVec 32))) (let ((.cse3 (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_68| (_ bv1 1)))) (or (bvsge (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_90)))) (store .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_68| (store (store (store (select .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_68|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_96|) v_DerPreprocessor_89) |v_ULTIMATE.start_main_~p~0#1.offset_96| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_77| (_ bv4 32)) v_DerPreprocessor_88))))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_67| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_67|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_95|) v_DerPreprocessor_87) |v_ULTIMATE.start_main_~p~0#1.offset_95| |v_ULTIMATE.start_main_~x~0#1_57|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_75| (_ bv4 32)) v_DerPreprocessor_86))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_98| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_98|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_94|) v_DerPreprocessor_85) |v_ULTIMATE.start_main_~p~0#1.offset_94| |v_ULTIMATE.start_main_~x~0#1_55|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store .cse3 |v_ULTIMATE.start_main_~tail~0#1.base_67| (_ bv1 1)) |v_ULTIMATE.start_main_~p~0#1.base_98|)))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_68|))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select .cse3 |v_ULTIMATE.start_main_~tail~0#1.base_67|))))))))) is different from false [2021-11-23 02:28:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2021-11-23 02:28:33,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769651931] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:33,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-23 02:28:33,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8] total 19 [2021-11-23 02:28:33,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780443829] [2021-11-23 02:28:33,652 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-23 02:28:33,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 02:28:33,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:28:33,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 02:28:33,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=118, Unknown=6, NotChecked=162, Total=342 [2021-11-23 02:28:33,653 INFO L87 Difference]: Start difference. First operand 102 states and 145 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) [2021-11-23 02:28:42,500 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_195 (_ BitVec 1)) (v_arrayElimCell_179 (_ BitVec 1))) (let ((.cse1 (bvneg (bvneg v_arrayElimCell_179))) (.cse0 (bvneg (bvneg v_arrayElimCell_195)))) (and (= (_ bv0 1) (bvadd .cse0 (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~list~0#1.base|)))) (= (_ bv0 1) (bvadd .cse1 (_ bv1 1))) (= (_ bv0 1) (bvadd (bvneg (bvneg .cse1)) (bvneg .cse0)))))) (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_94| (_ BitVec 32)) (v_DerPreprocessor_86 (_ BitVec 32)) (v_DerPreprocessor_85 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_98| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_98|)))) (bvsge (select (select (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_86)))) (store .cse2 |v_ULTIMATE.start_main_~p~0#1.base_98| (store (store (select .cse2 |v_ULTIMATE.start_main_~p~0#1.base_98|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_94|) v_DerPreprocessor_85) |v_ULTIMATE.start_main_~p~0#1.offset_94| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (exists ((|v_ULTIMATE.start_main_~tail~0#1.base_64| (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_64|))) (_ bv1 1))) (not (= |c_ULTIMATE.start_main_~list~0#1.base| |v_ULTIMATE.start_main_~tail~0#1.base_64|)) (not (= |v_ULTIMATE.start_main_~tail~0#1.base_64| |c_ULTIMATE.start_main_~tail~0#1.base|)))) (forall ((v_DerPreprocessor_73 (_ BitVec 32)) (v_DerPreprocessor_74 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_93| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsge (select (select (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_74)))) (store .cse3 |v_ULTIMATE.start_main_~p~0#1.base_93| (store (store (select .cse3 |v_ULTIMATE.start_main_~p~0#1.base_93|) (_ bv4 32) v_DerPreprocessor_73) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ULTIMATE.start_main_~tail~0#1.base|))) (= |c_ULTIMATE.start_main_~list~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~list~0#1.base| |c_ULTIMATE.start_main_~tail~0#1.base|))) is different from false [2021-11-23 02:28:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:43,097 INFO L93 Difference]: Finished difference Result 164 states and 232 transitions. [2021-11-23 02:28:43,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 02:28:43,097 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 [2021-11-23 02:28:43,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:43,099 INFO L225 Difference]: With dead ends: 164 [2021-11-23 02:28:43,099 INFO L226 Difference]: Without dead ends: 140 [2021-11-23 02:28:43,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=116, Invalid=284, Unknown=8, NotChecked=294, Total=702 [2021-11-23 02:28:43,100 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 50 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:43,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 124 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 98 Invalid, 0 Unknown, 261 Unchecked, 0.7s Time] [2021-11-23 02:28:43,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-23 02:28:43,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 108. [2021-11-23 02:28:43,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.4485981308411215) internal successors, (155), 107 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:28:43,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 155 transitions. [2021-11-23 02:28:43,114 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 155 transitions. Word has length 18 [2021-11-23 02:28:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:43,114 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 155 transitions. [2021-11-23 02:28:43,114 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) [2021-11-23 02:28:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 155 transitions. [2021-11-23 02:28:43,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:28:43,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:43,116 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:43,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:43,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:43,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:43,539 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:43,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:43,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1956847993, now seen corresponding path program 1 times [2021-11-23 02:28:43,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:28:43,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397278639] [2021-11-23 02:28:43,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:43,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:28:43,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:28:43,541 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:28:43,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 02:28:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:43,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:28:43,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:43,854 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 39 treesize of output 19 [2021-11-23 02:28:43,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2021-11-23 02:28:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:28:44,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:44,373 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-23 02:28:44,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 38 [2021-11-23 02:28:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:28:44,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:28:44,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397278639] [2021-11-23 02:28:44,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397278639] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:44,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1072388041] [2021-11-23 02:28:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:44,416 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:28:44,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:28:44,416 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:28:44,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-23 02:28:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:44,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:28:44,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:44,995 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 39 treesize of output 19 [2021-11-23 02:28:45,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2021-11-23 02:28:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:28:45,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:45,303 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-23 02:28:45,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 38 [2021-11-23 02:28:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:28:45,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1072388041] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:45,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409287133] [2021-11-23 02:28:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:45,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:45,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:28:45,346 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:28:45,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 02:28:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:45,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:28:45,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:45,408 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 [2021-11-23 02:28:45,675 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-23 02:28:45,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 40 [2021-11-23 02:28:45,697 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-23 02:28:45,698 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 49 treesize of output 49 [2021-11-23 02:28:46,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:46,062 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-23 02:28:46,063 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 51 treesize of output 33 [2021-11-23 02:28:46,086 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 02:28:46,086 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 37 treesize of output 18 [2021-11-23 02:28:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:28:46,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:48,902 INFO L354 Elim1Store]: treesize reduction 86, result has 32.8 percent of original size [2021-11-23 02:28:48,903 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 63 treesize of output 63 [2021-11-23 02:28:48,968 INFO L354 Elim1Store]: treesize reduction 23, result has 50.0 percent of original size [2021-11-23 02:28:48,968 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 63 treesize of output 67 [2021-11-23 02:28:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:28:49,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409287133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:49,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:28:49,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 10, 6, 6] total 31 [2021-11-23 02:28:49,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168719054] [2021-11-23 02:28:49,328 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:28:49,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 02:28:49,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:28:49,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 02:28:49,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-11-23 02:28:49,330 INFO L87 Difference]: Start difference. First operand 108 states and 155 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:28:58,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:58,317 INFO L93 Difference]: Finished difference Result 469 states and 669 transitions. [2021-11-23 02:28:58,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-23 02:28:58,321 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 02:28:58,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:58,324 INFO L225 Difference]: With dead ends: 469 [2021-11-23 02:28:58,325 INFO L226 Difference]: Without dead ends: 422 [2021-11-23 02:28:58,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1088, Invalid=4918, Unknown=0, NotChecked=0, Total=6006 [2021-11-23 02:28:58,329 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 265 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:58,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 248 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 470 Invalid, 0 Unknown, 106 Unchecked, 2.8s Time] [2021-11-23 02:28:58,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-11-23 02:28:58,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 256. [2021-11-23 02:28:58,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4745098039215687) internal successors, (376), 255 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:28:58,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 376 transitions. [2021-11-23 02:28:58,364 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 376 transitions. Word has length 20 [2021-11-23 02:28:58,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:58,364 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 376 transitions. [2021-11-23 02:28:58,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:28:58,365 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 376 transitions. [2021-11-23 02:28:58,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:28:58,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:58,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:58,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:58,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-23 02:28:58,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:58,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:28:58,969 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:58,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:58,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1147499445, now seen corresponding path program 1 times [2021-11-23 02:28:58,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:28:58,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256090813] [2021-11-23 02:28:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:58,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:28:58,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:28:58,971 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:28:58,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 02:28:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:59,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:28:59,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:59,288 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 [2021-11-23 02:28:59,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-11-23 02:29:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:29:00,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:29:01,643 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-23 02:29:01,643 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 [2021-11-23 02:29:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:29:01,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:29:01,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256090813] [2021-11-23 02:29:01,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256090813] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:29:01,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1982926952] [2021-11-23 02:29:01,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:01,696 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:29:01,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:29:01,704 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:29:01,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-23 02:29:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:01,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:29:01,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:02,630 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 [2021-11-23 02:29:03,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-11-23 02:29:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:29:03,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:29:03,967 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-23 02:29:03,967 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 [2021-11-23 02:29:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:29:04,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1982926952] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:29:04,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036833879] [2021-11-23 02:29:04,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:04,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:04,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:04,021 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:04,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-23 02:29:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:04,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:29:04,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:04,192 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 [2021-11-23 02:29:04,629 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 [2021-11-23 02:29:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:29:04,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:29:04,991 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-23 02:29:04,991 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 [2021-11-23 02:29:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:29:05,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036833879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:29:05,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:29:05,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11, 9, 10, 9] total 23 [2021-11-23 02:29:05,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172031608] [2021-11-23 02:29:05,038 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:29:05,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 02:29:05,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:29:05,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 02:29:05,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:29:05,040 INFO L87 Difference]: Start difference. First operand 256 states and 376 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) [2021-11-23 02:29:10,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:10,487 INFO L93 Difference]: Finished difference Result 580 states and 846 transitions. [2021-11-23 02:29:10,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 02:29:10,488 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 [2021-11-23 02:29:10,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:10,492 INFO L225 Difference]: With dead ends: 580 [2021-11-23 02:29:10,492 INFO L226 Difference]: Without dead ends: 578 [2021-11-23 02:29:10,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 94 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=318, Invalid=1014, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 02:29:10,495 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:10,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 174 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 210 Invalid, 0 Unknown, 238 Unchecked, 1.6s Time] [2021-11-23 02:29:10,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-11-23 02:29:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 445. [2021-11-23 02:29:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.4932432432432432) internal successors, (663), 444 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:29:10,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 663 transitions. [2021-11-23 02:29:10,526 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 663 transitions. Word has length 20 [2021-11-23 02:29:10,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:10,526 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 663 transitions. [2021-11-23 02:29:10,526 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) [2021-11-23 02:29:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 663 transitions. [2021-11-23 02:29:10,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:29:10,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:10,531 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:10,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:10,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-23 02:29:10,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:11,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:29:11,136 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:11,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:11,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1147501367, now seen corresponding path program 1 times [2021-11-23 02:29:11,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:29:11,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958835597] [2021-11-23 02:29:11,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:11,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:29:11,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:29:11,137 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:29:11,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 02:29:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:11,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:29:11,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:11,474 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 32 treesize of output 16 [2021-11-23 02:29:12,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-23 02:29:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:29:12,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:29:13,680 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-23 02:29:13,681 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 50 treesize of output 34 [2021-11-23 02:29:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:29:13,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:29:13,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958835597] [2021-11-23 02:29:13,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958835597] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:29:13,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [187572741] [2021-11-23 02:29:13,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:13,727 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:29:13,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:29:13,728 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:29:13,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-23 02:29:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:13,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:29:13,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:14,608 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 32 treesize of output 16 [2021-11-23 02:29:15,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-23 02:29:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:29:15,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:29:15,857 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-23 02:29:15,857 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 50 treesize of output 34 [2021-11-23 02:29:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:29:15,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [187572741] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:29:15,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664838364] [2021-11-23 02:29:15,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:15,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:15,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:15,904 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:15,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-23 02:29:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:15,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:29:15,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:16,073 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 32 treesize of output 16 [2021-11-23 02:29:16,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-23 02:29:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:29:16,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:29:16,738 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-23 02:29:16,738 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 50 treesize of output 34 [2021-11-23 02:29:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:29:16,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664838364] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:29:16,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:29:16,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10, 9, 9, 9] total 21 [2021-11-23 02:29:16,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533448145] [2021-11-23 02:29:16,786 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:29:16,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 02:29:16,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:29:16,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 02:29:16,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:29:16,787 INFO L87 Difference]: Start difference. First operand 445 states and 663 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-11-23 02:29:19,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:19,763 INFO L93 Difference]: Finished difference Result 981 states and 1437 transitions. [2021-11-23 02:29:19,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 02:29:19,763 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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 [2021-11-23 02:29:19,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:19,767 INFO L225 Difference]: With dead ends: 981 [2021-11-23 02:29:19,767 INFO L226 Difference]: Without dead ends: 495 [2021-11-23 02:29:19,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 97 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-11-23 02:29:19,770 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:19,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 95 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 150 Invalid, 0 Unknown, 71 Unchecked, 0.7s Time] [2021-11-23 02:29:19,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-23 02:29:19,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 378. [2021-11-23 02:29:19,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.5251989389920424) internal successors, (575), 377 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:29:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 575 transitions. [2021-11-23 02:29:19,794 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 575 transitions. Word has length 20 [2021-11-23 02:29:19,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:19,794 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 575 transitions. [2021-11-23 02:29:19,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-11-23 02:29:19,795 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 575 transitions. [2021-11-23 02:29:19,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:29:19,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:19,795 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:19,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:20,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-23 02:29:20,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:20,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:29:20,408 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:20,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:20,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1390342030, now seen corresponding path program 1 times [2021-11-23 02:29:20,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:29:20,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564999081] [2021-11-23 02:29:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:20,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:29:20,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:29:20,410 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:29:20,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-23 02:29:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:20,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:29:20,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:29:20,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:29:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:29:20,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:29:20,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564999081] [2021-11-23 02:29:20,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564999081] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:20,622 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:20,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 02:29:20,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068142867] [2021-11-23 02:29:20,622 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:20,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:29:20,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:29:20,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:29:20,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:29:20,623 INFO L87 Difference]: Start difference. First operand 378 states and 575 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:29:20,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:20,728 INFO L93 Difference]: Finished difference Result 682 states and 1038 transitions. [2021-11-23 02:29:20,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:29:20,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 02:29:20,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:20,737 INFO L225 Difference]: With dead ends: 682 [2021-11-23 02:29:20,737 INFO L226 Difference]: Without dead ends: 333 [2021-11-23 02:29:20,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:20,738 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:20,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 25 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:29:20,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-23 02:29:20,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 313. [2021-11-23 02:29:20,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.4647435897435896) internal successors, (457), 312 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:29:20,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 457 transitions. [2021-11-23 02:29:20,760 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 457 transitions. Word has length 20 [2021-11-23 02:29:20,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:20,760 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 457 transitions. [2021-11-23 02:29:20,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:29:20,761 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 457 transitions. [2021-11-23 02:29:20,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:29:20,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:20,762 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:20,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:20,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:29:20,977 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:20,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:20,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1494005967, now seen corresponding path program 2 times [2021-11-23 02:29:20,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:29:20,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978054889] [2021-11-23 02:29:20,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:29:20,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:29:20,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:29:20,979 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:29:20,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 02:29:21,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:29:21,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:29:21,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 02:29:21,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:21,108 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 [2021-11-23 02:29:21,121 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 [2021-11-23 02:29:21,226 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:29:21,227 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 [2021-11-23 02:29:21,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:21,289 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-23 02:29:21,289 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 [2021-11-23 02:29:21,577 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-23 02:29:21,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-23 02:29:21,617 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 02:29:21,618 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 [2021-11-23 02:29:21,888 INFO L354 Elim1Store]: treesize reduction 93, result has 29.0 percent of original size [2021-11-23 02:29:21,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-23 02:29:22,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:29:22,205 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 37 [2021-11-23 02:29:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:29:22,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:29:24,386 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_98 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_99 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_140| (_ BitVec 32))) (or (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_99)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_140| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_140|) (_ bv4 32) v_DerPreprocessor_98) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) is different from false [2021-11-23 02:29:26,764 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_100 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_91| (_ BitVec 32)) (v_DerPreprocessor_101 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_81| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_137| (_ BitVec 32)) (v_DerPreprocessor_98 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_99 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_68| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_140| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_101)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_81| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_81|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_137|) v_DerPreprocessor_100) |v_ULTIMATE.start_main_~p~0#1.offset_137| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_91| (_ bv4 32)) v_DerPreprocessor_99))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_140| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_140|) (_ bv4 32) v_DerPreprocessor_98) (_ bv0 32) |v_ULTIMATE.start_main_~x~0#1_68|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_81|)))) (bvslt |v_ULTIMATE.start_main_~x~0#1_68| (_ bv10 32)) (bvsgt |v_ULTIMATE.start_main_~x~0#1_68| (_ bv20 32)))) is different from false [2021-11-23 02:29:29,973 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_100 (_ BitVec 32)) (v_DerPreprocessor_101 (_ BitVec 32)) (v_DerPreprocessor_102 (_ BitVec 32)) (v_DerPreprocessor_103 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_68| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_93| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_91| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_138| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_81| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_82| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_137| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_70| (_ BitVec 32)) (v_DerPreprocessor_98 (_ BitVec 32)) (v_DerPreprocessor_99 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_140| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_82|))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_103)))) (store .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_82| (store (store (store (select .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_82|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_138|) v_DerPreprocessor_102) |v_ULTIMATE.start_main_~p~0#1.offset_138| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_93| (_ bv4 32)) v_DerPreprocessor_101))))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_81| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_81|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_137|) v_DerPreprocessor_100) |v_ULTIMATE.start_main_~p~0#1.offset_137| |v_ULTIMATE.start_main_~x~0#1_70|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_91| (_ bv4 32)) v_DerPreprocessor_99))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_140| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_140|) (_ bv4 32) v_DerPreprocessor_98) (_ bv0 32) |v_ULTIMATE.start_main_~x~0#1_68|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_82| (_ bv1 1)) |v_ULTIMATE.start_main_~tail~0#1.base_81|)))) (bvslt |v_ULTIMATE.start_main_~x~0#1_68| (_ bv10 32)) (bvsgt |v_ULTIMATE.start_main_~x~0#1_68| (_ bv20 32)))) is different from false [2021-11-23 02:29:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 20 not checked. [2021-11-23 02:29:31,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:29:31,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978054889] [2021-11-23 02:29:31,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978054889] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:29:31,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [105520740] [2021-11-23 02:29:31,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:29:31,428 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:29:31,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:29:31,435 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:29:31,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-23 02:29:31,572 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:29:31,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817421749] [2021-11-23 02:29:31,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:29:31,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:31,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:31,579 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:31,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 1 [2021-11-23 02:29:31,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-23 02:29:31,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:29:31,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:29:31,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 02:29:31,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:31,681 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 [2021-11-23 02:29:31,688 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 [2021-11-23 02:29:31,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:31,924 INFO L354 Elim1Store]: treesize reduction 118, result has 33.7 percent of original size [2021-11-23 02:29:31,924 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 [2021-11-23 02:29:31,984 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:29:31,985 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 [2021-11-23 02:29:32,225 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-23 02:29:32,226 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 85 treesize of output 77 [2021-11-23 02:29:32,282 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-23 02:29:32,282 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 49 treesize of output 66 [2021-11-23 02:29:32,697 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-23 02:29:32,698 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 99 treesize of output 91 [2021-11-23 02:29:32,749 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-23 02:29:32,749 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 63 treesize of output 67 [2021-11-23 02:29:32,857 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 29 treesize of output 17 [2021-11-23 02:29:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:29:32,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:29:34,936 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_110 (_ BitVec 32)) (v_DerPreprocessor_111 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_145| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_141| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_145|)))) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_111)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_145| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_145|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_141|) v_DerPreprocessor_110) |v_ULTIMATE.start_main_~p~0#1.offset_141| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)))) is different from false [2021-11-23 02:29:37,263 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_110 (_ BitVec 32)) (v_DerPreprocessor_111 (_ BitVec 32)) (v_DerPreprocessor_112 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_100| (_ BitVec 32)) (v_DerPreprocessor_113 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_142| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_141| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_145| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_75| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_88| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_88|))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_113)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_88| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_88|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_142|) v_DerPreprocessor_112) |v_ULTIMATE.start_main_~p~0#1.offset_142| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_100| (_ bv4 32)) v_DerPreprocessor_111))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_145| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_145|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_141|) v_DerPreprocessor_110) |v_ULTIMATE.start_main_~p~0#1.offset_141| |v_ULTIMATE.start_main_~x~0#1_75|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_88| (_ bv1 1)) |v_ULTIMATE.start_main_~p~0#1.base_145|)))))) is different from false [2021-11-23 02:29:40,218 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_110 (_ BitVec 32)) (v_DerPreprocessor_111 (_ BitVec 32)) (v_DerPreprocessor_112 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_100| (_ BitVec 32)) (v_DerPreprocessor_113 (_ BitVec 32)) (v_DerPreprocessor_114 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_102| (_ BitVec 32)) (v_DerPreprocessor_115 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_143| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_142| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_141| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_77| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_145| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_75| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_88| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_89| (_ BitVec 32))) (let ((.cse0 (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_89| (_ bv1 1)))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_89|))))))) (not (= (_ bv0 1) (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_main_~tail~0#1.base_88|))))) (bvsge (select (select (let ((.cse1 (let ((.cse2 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_115)))) (store .cse3 |v_ULTIMATE.start_main_~tail~0#1.base_89| (store (store (store (select .cse3 |v_ULTIMATE.start_main_~tail~0#1.base_89|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_143|) v_DerPreprocessor_114) |v_ULTIMATE.start_main_~p~0#1.offset_143| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_102| (_ bv4 32)) v_DerPreprocessor_113))))) (store .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_88| (store (store (store (select .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_88|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_142|) v_DerPreprocessor_112) |v_ULTIMATE.start_main_~p~0#1.offset_142| |v_ULTIMATE.start_main_~x~0#1_77|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_100| (_ bv4 32)) v_DerPreprocessor_111))))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_145| (store (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_145|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_141|) v_DerPreprocessor_110) |v_ULTIMATE.start_main_~p~0#1.offset_141| |v_ULTIMATE.start_main_~x~0#1_75|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (select (store .cse0 |v_ULTIMATE.start_main_~tail~0#1.base_88| (_ bv1 1)) |v_ULTIMATE.start_main_~p~0#1.base_145|)))))))) is different from false [2021-11-23 02:29:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 20 not checked. [2021-11-23 02:29:41,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817421749] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:29:41,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-23 02:29:41,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8] total 19 [2021-11-23 02:29:41,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971535238] [2021-11-23 02:29:41,427 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-23 02:29:41,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 02:29:41,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:29:41,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 02:29:41,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=118, Unknown=6, NotChecked=162, Total=342 [2021-11-23 02:29:41,428 INFO L87 Difference]: Start difference. First operand 313 states and 457 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) [2021-11-23 02:29:45,983 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_DerPreprocessor_98 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_99 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_140| (_ BitVec 32))) (or (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_99)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_140| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_140|) (_ bv4 32) v_DerPreprocessor_98) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) (exists ((|v_ULTIMATE.start_main_~tail~0#1.base_85| (_ BitVec 32))) (and (not (= |v_ULTIMATE.start_main_~tail~0#1.base_85| |c_ULTIMATE.start_main_~tail~0#1.base|)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_85|)))) (_ bv1 1))) (not (= |c_ULTIMATE.start_main_~list~0#1.base| |v_ULTIMATE.start_main_~tail~0#1.base_85|)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (exists ((v_arrayElimCell_244 (_ BitVec 1))) (let ((.cse1 (bvneg (bvneg v_arrayElimCell_244)))) (and (= (_ bv0 1) (bvadd .cse1 (select |c_#valid| |c_ULTIMATE.start_main_~list~0#1.base|))) (= (_ bv0 1) (bvadd (bvneg .cse1) (_ bv1 1)))))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ULTIMATE.start_main_~tail~0#1.base|))) (= |c_ULTIMATE.start_main_~list~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~list~0#1.base| |c_ULTIMATE.start_main_~tail~0#1.base|)) (forall ((v_DerPreprocessor_110 (_ BitVec 32)) (v_DerPreprocessor_111 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_145| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_141| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_145|)))) (bvsge (select (select (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_111)))) (store .cse2 |v_ULTIMATE.start_main_~p~0#1.base_145| (store (store (select .cse2 |v_ULTIMATE.start_main_~p~0#1.base_145|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_141|) v_DerPreprocessor_110) |v_ULTIMATE.start_main_~p~0#1.offset_141| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32))))) is different from false [2021-11-23 02:29:46,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:46,214 INFO L93 Difference]: Finished difference Result 545 states and 800 transitions. [2021-11-23 02:29:46,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:29:46,215 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 [2021-11-23 02:29:46,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:46,217 INFO L225 Difference]: With dead ends: 545 [2021-11-23 02:29:46,217 INFO L226 Difference]: Without dead ends: 337 [2021-11-23 02:29:46,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=78, Invalid=182, Unknown=8, NotChecked=238, Total=506 [2021-11-23 02:29:46,219 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:46,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 135 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 47 Invalid, 0 Unknown, 204 Unchecked, 0.3s Time] [2021-11-23 02:29:46,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-23 02:29:46,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 313. [2021-11-23 02:29:46,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.4647435897435896) internal successors, (457), 312 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:29:46,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 457 transitions. [2021-11-23 02:29:46,248 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 457 transitions. Word has length 20 [2021-11-23 02:29:46,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:46,248 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 457 transitions. [2021-11-23 02:29:46,248 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) [2021-11-23 02:29:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 457 transitions. [2021-11-23 02:29:46,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 02:29:46,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:46,249 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:46,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:46,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:46,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:29:46,676 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:46,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:46,676 INFO L85 PathProgramCache]: Analyzing trace with hash 232192162, now seen corresponding path program 2 times [2021-11-23 02:29:46,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:29:46,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945745438] [2021-11-23 02:29:46,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:29:46,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:29:46,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:29:46,679 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:29:46,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-23 02:29:46,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:29:46,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:29:46,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 02:29:46,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:46,857 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 [2021-11-23 02:29:46,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:46,987 INFO L354 Elim1Store]: treesize reduction 67, result has 22.1 percent of original size [2021-11-23 02:29:46,987 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 29 [2021-11-23 02:29:47,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:47,093 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-23 02:29:47,093 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 36 [2021-11-23 02:29:47,159 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:29:47,159 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 [2021-11-23 02:29:47,186 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 [2021-11-23 02:29:48,497 INFO L354 Elim1Store]: treesize reduction 307, result has 10.0 percent of original size [2021-11-23 02:29:48,497 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 377 treesize of output 247 [2021-11-23 02:29:48,766 INFO L354 Elim1Store]: treesize reduction 323, result has 9.0 percent of original size [2021-11-23 02:29:48,767 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 469 treesize of output 323 [2021-11-23 02:29:48,928 INFO L354 Elim1Store]: treesize reduction 955, result has 8.3 percent of original size [2021-11-23 02:29:48,928 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 356 treesize of output 308 [2021-11-23 02:29:48,966 INFO L354 Elim1Store]: treesize reduction 22, result has 69.9 percent of original size [2021-11-23 02:29:48,967 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 212 treesize of output 232 [2021-11-23 02:29:49,695 INFO L354 Elim1Store]: treesize reduction 162, result has 16.5 percent of original size [2021-11-23 02:29:49,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 247 treesize of output 160 [2021-11-23 02:29:49,749 INFO L354 Elim1Store]: treesize reduction 87, result has 17.9 percent of original size [2021-11-23 02:29:49,750 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 232 treesize of output 211 [2021-11-23 02:29:49,816 INFO L354 Elim1Store]: treesize reduction 152, result has 16.5 percent of original size [2021-11-23 02:29:49,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 158 [2021-11-23 02:29:49,915 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-23 02:29:49,916 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 218 treesize of output 109 [2021-11-23 02:29:49,927 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-23 02:29:49,928 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 80 treesize of output 48 [2021-11-23 02:29:49,994 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 [2021-11-23 02:29:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:29:50,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:29:52,671 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_121 (_ BitVec 32)) (v_DerPreprocessor_122 (_ BitVec 32)) (v_DerPreprocessor_123 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_148| (_ BitVec 32)) (v_DerPreprocessor_118 (_ BitVec 32)) (v_DerPreprocessor_119 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_152| (_ BitVec 32)) (v_DerPreprocessor_120 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_152|)))) (bvsge (let ((.cse3 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_148|)) (.cse4 (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32))) (.cse6 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) .cse4 v_DerPreprocessor_121)))) (store .cse2 |v_ULTIMATE.start_main_~p~0#1.base_152| (store (store (select .cse2 |v_ULTIMATE.start_main_~p~0#1.base_152|) .cse3 v_DerPreprocessor_120) |v_ULTIMATE.start_main_~p~0#1.offset_148| |ULTIMATE.start_main_~x~0#1|))))) (store .cse0 |c_ULTIMATE.start_main_~list~0#1.base| (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~list~0#1.base|))) (store .cse1 |c_ULTIMATE.start_main_~list~0#1.offset| (bvadd (select .cse1 |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv1 32)))))) (select (store (select (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~tail~0#1.base|) .cse4 |v_ULTIMATE.start_main_~p~0#1.base_152|)))) (store .cse5 |v_ULTIMATE.start_main_~p~0#1.base_152| (store (store (select .cse5 |v_ULTIMATE.start_main_~p~0#1.base_152|) .cse3 (_ bv0 32)) |v_ULTIMATE.start_main_~p~0#1.offset_148| v_DerPreprocessor_122))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset| v_DerPreprocessor_118) .cse6)) (select (store (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~tail~0#1.base|) .cse4 |v_ULTIMATE.start_main_~p~0#1.offset_148|)))) (store .cse7 |v_ULTIMATE.start_main_~p~0#1.base_152| (store (store (select .cse7 |v_ULTIMATE.start_main_~p~0#1.base_152|) .cse3 (_ bv0 32)) |v_ULTIMATE.start_main_~p~0#1.offset_148| v_DerPreprocessor_123))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset| v_DerPreprocessor_119) .cse6))) (_ bv10 32)))) is different from false [2021-11-23 02:29:54,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:29:54,037 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 215916 treesize of output 213635 [2021-11-23 02:30:02,275 INFO L354 Elim1Store]: treesize reduction 375, result has 17.0 percent of original size [2021-11-23 02:30:02,276 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 226856 treesize of output 206277 [2021-11-23 02:30:04,727 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-11-23 02:30:04,727 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 239885 treesize of output 222595 [2021-11-23 02:30:10,525 INFO L354 Elim1Store]: treesize reduction 414, result has 18.5 percent of original size [2021-11-23 02:30:10,526 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 235816 treesize of output 214234 [2021-11-23 02:30:12,537 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-11-23 02:30:12,537 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 245820 treesize of output 229544 [2021-11-23 02:30:14,530 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:30:14,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945745438] [2021-11-23 02:30:14,531 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-23 02:30:14,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [890210517] [2021-11-23 02:30:14,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:30:14,531 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:30:14,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:30:14,540 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:30:14,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93357bdb-c85d-4ab0-8ca8-0bb7a53d608d/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-23 02:30:14,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:30:14,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:30:14,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 02:30:14,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:14,691 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 [2021-11-23 02:30:14,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:14,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:14,897 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 02:30:14,897 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 [2021-11-23 02:30:14,908 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 [2021-11-23 02:30:14,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:14,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:14,955 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:30:14,955 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 [2021-11-23 02:30:15,009 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:30:15,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-11-23 02:30:15,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:15,835 INFO L354 Elim1Store]: treesize reduction 202, result has 11.0 percent of original size [2021-11-23 02:30:15,836 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 365 treesize of output 235 [2021-11-23 02:30:15,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:16,000 INFO L354 Elim1Store]: treesize reduction 194, result has 10.6 percent of original size [2021-11-23 02:30:16,001 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 457 treesize of output 311 [2021-11-23 02:30:16,061 INFO L354 Elim1Store]: treesize reduction 108, result has 20.0 percent of original size [2021-11-23 02:30:16,061 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 219 treesize of output 185 [2021-11-23 02:30:16,097 INFO L354 Elim1Store]: treesize reduction 22, result has 61.4 percent of original size [2021-11-23 02:30:16,097 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 145 treesize of output 157 [2021-11-23 02:30:16,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:16,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:16,760 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 02:30:16,760 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 166 treesize of output 112 [2021-11-23 02:30:16,789 INFO L354 Elim1Store]: treesize reduction 51, result has 20.3 percent of original size [2021-11-23 02:30:16,790 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 151 treesize of output 136 [2021-11-23 02:30:16,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:16,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:16,801 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-23 02:30:16,801 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 134 treesize of output 128 [2021-11-23 02:30:16,881 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:30:16,881 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 [2021-11-23 02:30:16,891 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 02:30:16,891 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 [2021-11-23 02:30:16,990 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 [2021-11-23 02:30:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:30:17,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:30:22,887 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_132 (_ BitVec 32)) (v_DerPreprocessor_133 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_157| (_ BitVec 32)) (v_DerPreprocessor_128 (_ BitVec 32)) (v_DerPreprocessor_129 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (v_DerPreprocessor_130 (_ BitVec 32)) (v_DerPreprocessor_131 (_ BitVec 32))) (let ((.cse3 (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32))) (.cse7 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|))) (let ((.cse5 (select (store (select (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~tail~0#1.base|) .cse3 (_ bv0 32))))) (store .cse8 |v_ULTIMATE.start_main_~p~0#1.base_157| (store (store (select .cse8 |v_ULTIMATE.start_main_~p~0#1.base_157|) (_ bv4 32) (_ bv0 32)) (_ bv0 32) v_DerPreprocessor_133))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset| v_DerPreprocessor_129) .cse7)) (.cse4 (select (store (select (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~tail~0#1.base|) .cse3 |v_ULTIMATE.start_main_~p~0#1.base_157|)))) (store .cse6 |v_ULTIMATE.start_main_~p~0#1.base_157| (store (store (select .cse6 |v_ULTIMATE.start_main_~p~0#1.base_157|) (_ bv4 32) (_ bv0 32)) (_ bv0 32) v_DerPreprocessor_132))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset| v_DerPreprocessor_128) .cse7))) (or (bvsge (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) .cse3 v_DerPreprocessor_131)))) (store .cse2 |v_ULTIMATE.start_main_~p~0#1.base_157| (store (store (select .cse2 |v_ULTIMATE.start_main_~p~0#1.base_157|) (_ bv4 32) v_DerPreprocessor_130) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))))) (store .cse0 |c_ULTIMATE.start_main_~list~0#1.base| (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~list~0#1.base|))) (store .cse1 |c_ULTIMATE.start_main_~list~0#1.offset| (bvadd (select .cse1 |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv1 32)))))) .cse4) .cse5) (_ bv10 32)) (and (= .cse5 (_ bv0 32)) (= .cse4 (_ bv0 32))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_157|)))))))) is different from false [2021-11-23 02:30:28,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:30:28,432 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 12510997 treesize of output 12375144 [2021-11-23 02:31:21,301 WARN L227 SmtUtils]: Spent 52.87s on a formula simplification that was a NOOP. DAG size: 826 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:32:14,419 WARN L227 SmtUtils]: Spent 53.06s on a formula simplification that was a NOOP. DAG size: 830 (called from [L 179] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate) [2021-11-23 02:33:07,781 WARN L227 SmtUtils]: Spent 53.36s on a formula simplification that was a NOOP. DAG size: 792 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:34:01,272 WARN L227 SmtUtils]: Spent 53.49s on a formula simplification that was a NOOP. DAG size: 821 (called from [L 184] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate) [2021-11-23 02:34:55,812 WARN L227 SmtUtils]: Spent 54.48s on a formula simplification that was a NOOP. DAG size: 821 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:34:58,126 INFO L354 Elim1Store]: treesize reduction 243, result has 25.7 percent of original size [2021-11-23 02:34:58,127 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 12588097 treesize of output 12264596 [2021-11-23 02:35:53,990 WARN L227 SmtUtils]: Spent 55.86s on a formula simplification that was a NOOP. DAG size: 840 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:36:49,037 WARN L227 SmtUtils]: Spent 55.04s on a formula simplification that was a NOOP. DAG size: 829 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:36:50,451 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-11-23 02:36:50,452 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 14102684 treesize of output 13175476 [2021-11-23 02:37:49,014 WARN L227 SmtUtils]: Spent 58.56s on a formula simplification that was a NOOP. DAG size: 849 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)