./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/scalar_loopdep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/scalar_loopdep.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF --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 004e76a55ea43180d22836854efb5ff40e4c49966cf8226e42027e9f69007914 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:39:44,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:39:44,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:39:44,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:39:44,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:39:44,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:39:44,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:39:44,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:39:44,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:39:44,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:39:44,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:39:44,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:39:44,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:39:44,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:39:44,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:39:44,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:39:44,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:39:44,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:39:44,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:39:44,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:39:44,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:39:44,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:39:44,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:39:44,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:39:45,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:39:45,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:39:45,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:39:45,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:39:45,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:39:45,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:39:45,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:39:45,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:39:45,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:39:45,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:39:45,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:39:45,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:39:45,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:39:45,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:39:45,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:39:45,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:39:45,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:39:45,023 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:39:45,076 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:39:45,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:39:45,081 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:39:45,082 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:39:45,082 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:39:45,082 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:39:45,082 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:39:45,082 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:39:45,083 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:39:45,083 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:39:45,084 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:39:45,084 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:39:45,085 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:39:45,085 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:39:45,085 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:39:45,085 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:39:45,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:39:45,087 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:39:45,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:39:45,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:39:45,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:39:45,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:39:45,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:39:45,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:39:45,088 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:39:45,089 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:39:45,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:39:45,089 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:39:45,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:39:45,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:39:45,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:39:45,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:39:45,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:39:45,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:39:45,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:39:45,092 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:39:45,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:39:45,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:39:45,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:39:45,093 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:39:45,093 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_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 004e76a55ea43180d22836854efb5ff40e4c49966cf8226e42027e9f69007914 [2021-11-13 01:39:45,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:39:45,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:39:45,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:39:45,393 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:39:45,394 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:39:45,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/array-lopstr16/scalar_loopdep.i [2021-11-13 01:39:45,463 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/data/159096921/7c2ba82066e343888514889f281b971d/FLAG6f7b30587 [2021-11-13 01:39:45,977 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:39:45,978 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/sv-benchmarks/c/array-lopstr16/scalar_loopdep.i [2021-11-13 01:39:45,986 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/data/159096921/7c2ba82066e343888514889f281b971d/FLAG6f7b30587 [2021-11-13 01:39:46,343 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/data/159096921/7c2ba82066e343888514889f281b971d [2021-11-13 01:39:46,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:39:46,350 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:39:46,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:39:46,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:39:46,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:39:46,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:39:46" (1/1) ... [2021-11-13 01:39:46,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5671978a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:46, skipping insertion in model container [2021-11-13 01:39:46,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:39:46" (1/1) ... [2021-11-13 01:39:46,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:39:46,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:39:46,592 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/sv-benchmarks/c/array-lopstr16/scalar_loopdep.i[807,820] [2021-11-13 01:39:46,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:39:48,540 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:39:48,554 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/sv-benchmarks/c/array-lopstr16/scalar_loopdep.i[807,820] [2021-11-13 01:39:48,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:39:48,581 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:39:48,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:48 WrapperNode [2021-11-13 01:39:48,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:39:48,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:39:48,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:39:48,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:39:48,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:48" (1/1) ... [2021-11-13 01:39:48,601 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:48" (1/1) ... [2021-11-13 01:39:48,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:39:48,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:39:48,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:39:48,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:39:48,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:48" (1/1) ... [2021-11-13 01:39:48,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:48" (1/1) ... [2021-11-13 01:39:48,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:48" (1/1) ... [2021-11-13 01:39:48,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:48" (1/1) ... [2021-11-13 01:39:48,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:48" (1/1) ... [2021-11-13 01:39:48,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:48" (1/1) ... [2021-11-13 01:39:48,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:48" (1/1) ... [2021-11-13 01:39:48,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:39:48,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:39:48,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:39:48,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:39:48,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:48" (1/1) ... [2021-11-13 01:39:48,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:39:48,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:39:48,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:39:48,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:39:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 01:39:48,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:39:48,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 01:39:48,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:39:48,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:39:48,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 01:39:48,971 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:39:48,977 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 01:39:48,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:39:48 BoogieIcfgContainer [2021-11-13 01:39:48,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:39:48,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:39:48,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:39:48,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:39:48,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:39:46" (1/3) ... [2021-11-13 01:39:48,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406c6306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:39:48, skipping insertion in model container [2021-11-13 01:39:48,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:48" (2/3) ... [2021-11-13 01:39:48,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406c6306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:39:48, skipping insertion in model container [2021-11-13 01:39:48,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:39:48" (3/3) ... [2021-11-13 01:39:48,993 INFO L111 eAbstractionObserver]: Analyzing ICFG scalar_loopdep.i [2021-11-13 01:39:48,999 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:39:49,000 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:39:49,045 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:39:49,052 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 [2021-11-13 01:39:49,053 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:39:49,066 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:49,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-13 01:39:49,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:49,072 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-13 01:39:49,073 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:49,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:49,079 INFO L85 PathProgramCache]: Analyzing trace with hash 73548118, now seen corresponding path program 1 times [2021-11-13 01:39:49,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:39:49,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557066938] [2021-11-13 01:39:49,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:49,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:39:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:49,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:39:49,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557066938] [2021-11-13 01:39:49,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557066938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:49,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:39:49,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 01:39:49,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860970401] [2021-11-13 01:39:49,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:49,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:39:49,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:39:49,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:39:49,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:39:49,315 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:49,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:49,399 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2021-11-13 01:39:49,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:39:49,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-13 01:39:49,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:49,412 INFO L225 Difference]: With dead ends: 20 [2021-11-13 01:39:49,413 INFO L226 Difference]: Without dead ends: 13 [2021-11-13 01:39:49,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:39:49,421 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.61ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.18ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:49,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 12 Unknown, 0 Unchecked, 0.61ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 41.18ms Time] [2021-11-13 01:39:49,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-13 01:39:49,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 8. [2021-11-13 01:39:49,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-13 01:39:49,449 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2021-11-13 01:39:49,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:49,450 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-13 01:39:49,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:49,450 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-13 01:39:49,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-13 01:39:49,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:49,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-13 01:39:49,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 01:39:49,452 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:49,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:49,453 INFO L85 PathProgramCache]: Analyzing trace with hash -2017898072, now seen corresponding path program 1 times [2021-11-13 01:39:49,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:39:49,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754179614] [2021-11-13 01:39:49,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:49,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:39:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:49,498 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:39:49,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754179614] [2021-11-13 01:39:49,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754179614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:39:49,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88947485] [2021-11-13 01:39:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:49,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:39:49,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:39:49,506 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:39:49,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 01:39:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:49,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:39:49,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:49,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:49,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88947485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:49,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [499784324] [2021-11-13 01:39:49,705 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-13 01:39:49,710 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:39:49,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:39:49,723 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:39:49,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:39:49,761 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:49,769 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:49,770 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:49,771 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:39:49,773 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:49,774 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:49,775 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-13 01:39:49,776 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:49,777 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:49,777 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:39:49,782 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-13 01:39:49,804 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-13 01:39:49,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:49,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:49,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:49,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:39:49,842 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:49,844 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:39:49,845 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:49,846 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:39:49,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:49,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:49,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:49,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:49,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:49,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:49,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:49,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:49,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:49,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:49,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:49,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:49,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:39:49,959 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:49,965 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:39:49,966 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:49,970 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:39:49,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:49,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:50,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:50,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-13 01:39:50,034 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,036 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-13 01:39:50,037 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-13 01:39:50,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:50,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:50,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,069 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,073 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-13 01:39:50,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:39:50,075 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:129, output treesize:103 [2021-11-13 01:39:50,087 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-11-13 01:39:50,098 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:50,099 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,100 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-13 01:39:50,106 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-11-13 01:39:50,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:50,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-13 01:39:50,144 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,152 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-13 01:39:50,153 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-13 01:39:50,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:50,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:50,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,176 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,179 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-11-13 01:39:50,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:39:50,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:117, output treesize:109 [2021-11-13 01:39:50,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:50,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:50,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:50,300 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,312 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:50,321 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,327 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-11-13 01:39:50,338 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:50,385 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,391 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:50,392 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,407 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-13 01:39:50,409 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:50,410 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,412 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-13 01:39:50,417 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 250 [2021-11-13 01:39:50,419 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:50,433 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,438 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-11-13 01:39:50,447 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 289 [2021-11-13 01:39:50,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:50,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-13 01:39:50,478 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,483 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 01:39:50,484 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,485 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 01:39:50,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:50,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:50,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2021-11-13 01:39:50,502 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,506 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-13 01:39:50,506 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,507 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-13 01:39:50,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:50,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:50,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,556 INFO L180 QuantifierPusher]: treesize reduction 88, result has 74.3 percent of original size [2021-11-13 01:39:50,565 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 254 [2021-11-13 01:39:50,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-13 01:39:50,566 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:358, output treesize:254 [2021-11-13 01:39:50,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:50,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:50,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:50,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:50,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:50,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:50,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:50,636 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-13 01:39:50,639 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:50,640 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,640 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-13 01:39:50,642 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-11-13 01:39:50,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-13 01:39:50,650 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,650 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-13 01:39:50,651 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,651 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-13 01:39:50,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:50,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:50,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:50,658 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-13 01:39:50,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:39:50,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:56 [2021-11-13 01:39:50,666 INFO L180 QuantifierPusher]: treesize reduction 34, result has 52.8 percent of original size [2021-11-13 01:39:50,668 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-13 01:39:50,673 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:39:50,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:39:50,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:39:50,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-13 01:39:50,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016308523] [2021-11-13 01:39:50,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:39:50,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:39:50,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:39:50,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:39:50,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:39:50,945 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 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) [2021-11-13 01:39:51,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:51,010 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-11-13 01:39:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:39:51,011 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-13 01:39:51,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:51,012 INFO L225 Difference]: With dead ends: 32 [2021-11-13 01:39:51,012 INFO L226 Difference]: Without dead ends: 27 [2021-11-13 01:39:51,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:39:51,014 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.00ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.22ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:51,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 12 Invalid, 26 Unknown, 0 Unchecked, 1.00ms Time], IncrementalHoareTripleChecker [10 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 54.22ms Time] [2021-11-13 01:39:51,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-13 01:39:51,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 11. [2021-11-13 01:39:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-13 01:39:51,019 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-11-13 01:39:51,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:51,019 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-13 01:39:51,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 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) [2021-11-13 01:39:51,020 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-13 01:39:51,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-13 01:39:51,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:51,033 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2021-11-13 01:39:51,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-13 01:39:51,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-13 01:39:51,234 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:51,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:51,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1446197802, now seen corresponding path program 2 times [2021-11-13 01:39:51,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:39:51,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118750199] [2021-11-13 01:39:51,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:51,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:39:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:51,334 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:39:51,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118750199] [2021-11-13 01:39:51,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118750199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:39:51,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103290149] [2021-11-13 01:39:51,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:39:51,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:39:51,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:39:51,337 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:39:51,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 01:39:51,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 01:39:51,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:39:51,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:39:51,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:51,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:51,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103290149] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:51,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [216287275] [2021-11-13 01:39:51,534 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-13 01:39:51,534 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:39:51,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:39:51,535 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:39:51,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:39:51,549 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,550 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:51,555 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,555 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-13 01:39:51,557 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:51,557 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,558 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:39:51,559 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:51,559 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,560 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:39:51,564 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-13 01:39:51,571 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-13 01:39:51,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:51,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:51,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:51,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:39:51,585 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,585 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:39:51,589 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,590 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:39:51,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:51,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:51,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:51,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:51,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:51,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:51,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:51,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:51,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:51,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:51,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:51,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:39:51,626 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,630 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:39:51,631 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,632 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:39:51,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:51,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:51,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:51,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-13 01:39:51,652 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,653 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-13 01:39:51,654 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-13 01:39:51,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:51,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:51,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,664 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,669 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-13 01:39:51,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:39:51,670 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:129, output treesize:103 [2021-11-13 01:39:51,678 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-11-13 01:39:51,684 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:51,684 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,685 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-13 01:39:51,689 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-13 01:39:51,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:51,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-13 01:39:51,709 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,713 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-13 01:39:51,714 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,715 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-13 01:39:51,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:51,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:51,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,725 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,729 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-13 01:39:51,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:39:51,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:119, output treesize:111 [2021-11-13 01:39:51,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:51,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:51,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:51,796 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,813 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:51,817 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,822 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 220 [2021-11-13 01:39:51,829 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:51,832 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,833 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:51,834 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,835 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-13 01:39:51,836 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:51,837 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,838 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-13 01:39:51,842 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 260 [2021-11-13 01:39:51,843 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:51,847 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,849 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 239 [2021-11-13 01:39:51,854 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 297 [2021-11-13 01:39:51,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:51,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2021-11-13 01:39:51,882 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,884 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-13 01:39:51,885 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,885 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-13 01:39:51,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:51,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:51,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-11-13 01:39:51,904 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,907 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-13 01:39:51,908 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,909 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-13 01:39:51,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:51,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:51,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:51,954 INFO L180 QuantifierPusher]: treesize reduction 92, result has 73.9 percent of original size [2021-11-13 01:39:51,962 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 260 [2021-11-13 01:39:51,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-13 01:39:51,963 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:368, output treesize:260 [2021-11-13 01:39:51,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:51,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:51,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:52,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:52,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:52,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:52,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:52,024 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-13 01:39:52,028 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:52,029 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:52,029 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-13 01:39:52,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-11-13 01:39:52,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-13 01:39:52,037 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:52,037 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-13 01:39:52,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:52,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-13 01:39:52,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:52,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:52,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:52,042 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:52,043 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-13 01:39:52,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:39:52,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:56 [2021-11-13 01:39:52,052 INFO L180 QuantifierPusher]: treesize reduction 34, result has 52.8 percent of original size [2021-11-13 01:39:52,054 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-13 01:39:52,058 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:39:52,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:39:52,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:39:52,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-13 01:39:52,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007320585] [2021-11-13 01:39:52,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:39:52,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 01:39:52,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:39:52,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 01:39:52,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=147, Unknown=0, NotChecked=0, Total=272 [2021-11-13 01:39:52,282 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 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) [2021-11-13 01:39:52,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:52,387 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-11-13 01:39:52,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 01:39:52,388 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-13 01:39:52,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:52,389 INFO L225 Difference]: With dead ends: 68 [2021-11-13 01:39:52,389 INFO L226 Difference]: Without dead ends: 63 [2021-11-13 01:39:52,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=147, Unknown=0, NotChecked=0, Total=272 [2021-11-13 01:39:52,391 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 92 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.66ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.73ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:52,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 30 Invalid, 64 Unknown, 0 Unchecked, 5.66ms Time], IncrementalHoareTripleChecker [30 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 60.73ms Time] [2021-11-13 01:39:52,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-13 01:39:52,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 17. [2021-11-13 01:39:52,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:52,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-13 01:39:52,399 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2021-11-13 01:39:52,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:52,399 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-13 01:39:52,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 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) [2021-11-13 01:39:52,399 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-13 01:39:52,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 01:39:52,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:52,400 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2021-11-13 01:39:52,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:52,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:39:52,621 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:52,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:52,622 INFO L85 PathProgramCache]: Analyzing trace with hash -72035178, now seen corresponding path program 3 times [2021-11-13 01:39:52,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:39:52,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085945523] [2021-11-13 01:39:52,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:52,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:39:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:52,795 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:39:52,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085945523] [2021-11-13 01:39:52,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085945523] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:39:52,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370114387] [2021-11-13 01:39:52,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 01:39:52,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:39:52,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:39:52,801 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:39:52,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 01:39:52,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 01:39:52,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:39:52,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 01:39:52,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:52,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:53,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370114387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:53,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1817871319] [2021-11-13 01:39:53,178 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-13 01:39:53,179 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:39:53,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:39:53,179 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:39:53,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:39:53,184 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,185 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:53,187 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,187 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:39:53,188 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:53,189 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,189 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:39:53,190 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:53,195 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,195 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-13 01:39:53,197 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-13 01:39:53,199 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-11-13 01:39:53,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:53,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:53,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:53,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:39:53,210 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,211 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:39:53,211 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,212 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:39:53,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:53,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:53,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:53,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:53,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:53,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:53,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:53,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:53,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:53,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:53,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:53,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:39:53,238 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,240 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:39:53,241 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,242 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:39:53,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:53,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:53,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:53,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-13 01:39:53,262 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,264 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-13 01:39:53,264 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,265 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-13 01:39:53,265 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:53,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:53,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,270 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,272 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-13 01:39:53,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:39:53,272 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:129, output treesize:103 [2021-11-13 01:39:53,280 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-11-13 01:39:53,283 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:53,284 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,285 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-13 01:39:53,287 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-11-13 01:39:53,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:53,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-13 01:39:53,298 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,299 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-13 01:39:53,300 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,300 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-13 01:39:53,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:53,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:53,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,306 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,308 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-11-13 01:39:53,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:39:53,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:117, output treesize:109 [2021-11-13 01:39:53,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:53,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:53,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:53,372 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,378 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:53,381 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,384 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 218 [2021-11-13 01:39:53,388 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:53,390 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,391 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:53,392 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,392 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-13 01:39:53,393 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:53,394 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,395 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-11-13 01:39:53,398 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 258 [2021-11-13 01:39:53,398 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:53,401 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,403 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 237 [2021-11-13 01:39:53,408 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 295 [2021-11-13 01:39:53,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:53,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2021-11-13 01:39:53,427 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,429 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-13 01:39:53,429 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,430 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-13 01:39:53,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:53,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:53,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-11-13 01:39:53,444 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,445 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-13 01:39:53,446 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,448 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-13 01:39:53,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:53,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:53,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,489 INFO L180 QuantifierPusher]: treesize reduction 92, result has 73.7 percent of original size [2021-11-13 01:39:53,492 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 258 [2021-11-13 01:39:53,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-13 01:39:53,494 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:366, output treesize:258 [2021-11-13 01:39:53,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:53,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:53,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:53,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:53,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:53,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:53,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:53,551 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-13 01:39:53,562 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:53,562 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,563 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-13 01:39:53,564 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-11-13 01:39:53,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-13 01:39:53,569 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,569 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-13 01:39:53,570 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,570 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-13 01:39:53,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:53,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:53,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,574 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:53,575 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-13 01:39:53,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:39:53,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:56 [2021-11-13 01:39:53,580 INFO L180 QuantifierPusher]: treesize reduction 34, result has 52.8 percent of original size [2021-11-13 01:39:53,581 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-13 01:39:53,586 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:39:53,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:39:53,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:39:53,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-13 01:39:53,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357653152] [2021-11-13 01:39:53,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:39:53,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 01:39:53,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:39:53,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 01:39:53,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=429, Unknown=0, NotChecked=0, Total=812 [2021-11-13 01:39:53,776 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 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) [2021-11-13 01:39:53,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:53,973 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2021-11-13 01:39:53,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-13 01:39:53,973 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 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 15 [2021-11-13 01:39:53,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:53,975 INFO L225 Difference]: With dead ends: 140 [2021-11-13 01:39:53,975 INFO L226 Difference]: Without dead ends: 135 [2021-11-13 01:39:53,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=383, Invalid=429, Unknown=0, NotChecked=0, Total=812 [2021-11-13 01:39:53,977 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 348 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.17ms SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.66ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:53,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 69 Invalid, 177 Unknown, 0 Unchecked, 4.17ms Time], IncrementalHoareTripleChecker [104 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 134.66ms Time] [2021-11-13 01:39:53,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-13 01:39:53,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 29. [2021-11-13 01:39:53,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-13 01:39:53,985 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2021-11-13 01:39:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:53,985 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-13 01:39:53,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 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) [2021-11-13 01:39:53,985 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-13 01:39:53,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 01:39:53,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:53,986 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2021-11-13 01:39:54,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:54,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:39:54,201 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:54,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:54,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1175372310, now seen corresponding path program 4 times [2021-11-13 01:39:54,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:39:54,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579879037] [2021-11-13 01:39:54,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:54,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:39:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:54,556 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:39:54,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579879037] [2021-11-13 01:39:54,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579879037] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:39:54,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296963729] [2021-11-13 01:39:54,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 01:39:54,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:39:54,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:39:54,558 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:39:54,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 01:39:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:54,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-13 01:39:54,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:54,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:55,533 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:55,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296963729] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:55,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1448725213] [2021-11-13 01:39:55,536 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-13 01:39:55,536 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:39:55,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:39:55,536 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:39:55,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:39:55,542 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,543 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:55,543 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,544 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-13 01:39:55,545 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:55,545 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,546 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:39:55,546 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:55,547 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,547 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:39:55,549 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-13 01:39:55,551 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-11-13 01:39:55,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:55,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:55,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:55,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:39:55,563 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,564 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:39:55,564 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,565 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:39:55,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:55,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:55,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:55,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:55,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:55,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:55,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:55,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:55,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:55,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:55,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:55,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:39:55,594 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,597 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:39:55,603 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,604 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:39:55,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:55,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:55,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:55,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-13 01:39:55,622 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,624 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-13 01:39:55,624 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,626 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-13 01:39:55,626 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:55,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:55,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,632 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,634 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-13 01:39:55,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:39:55,634 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:129, output treesize:103 [2021-11-13 01:39:55,638 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-11-13 01:39:55,641 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:55,641 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,642 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-13 01:39:55,644 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-13 01:39:55,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:55,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-13 01:39:55,655 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,656 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 01:39:55,657 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,658 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 01:39:55,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:55,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:55,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,664 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,667 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-13 01:39:55,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:39:55,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:126, output treesize:118 [2021-11-13 01:39:55,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:55,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:55,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:55,744 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,750 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:55,752 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,756 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 225 [2021-11-13 01:39:55,760 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:55,763 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,765 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:55,766 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,766 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-13 01:39:55,768 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:55,768 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,769 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-13 01:39:55,772 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 265 [2021-11-13 01:39:55,774 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:55,776 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,779 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 244 [2021-11-13 01:39:55,782 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 302 [2021-11-13 01:39:55,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:55,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2021-11-13 01:39:55,802 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,804 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-13 01:39:55,805 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,805 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-13 01:39:55,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:55,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:55,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2021-11-13 01:39:55,818 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,820 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-13 01:39:55,821 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,822 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-13 01:39:55,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:55,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:55,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,858 INFO L180 QuantifierPusher]: treesize reduction 92, result has 74.2 percent of original size [2021-11-13 01:39:55,861 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 265 [2021-11-13 01:39:55,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-13 01:39:55,862 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:373, output treesize:265 [2021-11-13 01:39:55,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:55,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:55,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:55,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:55,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:55,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:55,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:55,911 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-13 01:39:55,916 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:39:55,916 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,917 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-13 01:39:55,918 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-11-13 01:39:55,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-13 01:39:55,925 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,925 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-13 01:39:55,926 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,926 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-13 01:39:55,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:39:55,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:39:55,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,930 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:39:55,932 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-13 01:39:55,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:39:55,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:56 [2021-11-13 01:39:55,939 INFO L180 QuantifierPusher]: treesize reduction 34, result has 52.8 percent of original size [2021-11-13 01:39:55,941 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-13 01:39:55,947 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:39:56,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:39:56,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:39:56,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2021-11-13 01:39:56,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966681393] [2021-11-13 01:39:56,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:39:56,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-13 01:39:56,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:39:56,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-13 01:39:56,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1425, Unknown=0, NotChecked=0, Total=2756 [2021-11-13 01:39:56,165 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:56,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:56,654 INFO L93 Difference]: Finished difference Result 284 states and 309 transitions. [2021-11-13 01:39:56,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-13 01:39:56,655 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-13 01:39:56,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:56,658 INFO L225 Difference]: With dead ends: 284 [2021-11-13 01:39:56,658 INFO L226 Difference]: Without dead ends: 279 [2021-11-13 01:39:56,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1331, Invalid=1425, Unknown=0, NotChecked=0, Total=2756 [2021-11-13 01:39:56,665 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 564 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 187.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.87ms SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 230.77ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:56,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 138 Invalid, 311 Unknown, 0 Unchecked, 5.87ms Time], IncrementalHoareTripleChecker [169 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 230.77ms Time] [2021-11-13 01:39:56,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-13 01:39:56,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 53. [2021-11-13 01:39:56,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:56,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-11-13 01:39:56,687 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2021-11-13 01:39:56,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:56,687 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-11-13 01:39:56,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:56,689 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-11-13 01:39:56,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 01:39:56,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:56,691 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2021-11-13 01:39:56,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:56,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:39:56,905 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:56,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:56,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1077533974, now seen corresponding path program 5 times [2021-11-13 01:39:56,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:39:56,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896794917] [2021-11-13 01:39:56,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:56,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:39:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:58,079 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:39:58,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896794917] [2021-11-13 01:39:58,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896794917] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:39:58,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066978687] [2021-11-13 01:39:58,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:39:58,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:39:58,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:39:58,085 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:39:58,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 01:41:36,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-13 01:41:36,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:41:36,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-13 01:41:36,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:36,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:39,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066978687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:41:39,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1073972258] [2021-11-13 01:41:39,058 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-13 01:41:39,058 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:41:39,059 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:41:39,059 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:41:39,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:41:39,064 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,065 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:39,065 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,066 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-13 01:41:39,066 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:39,067 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,067 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:41:39,067 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:39,068 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,068 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:41:39,069 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-13 01:41:39,082 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-11-13 01:41:39,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:39,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:39,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:39,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:41:39,096 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,097 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:41:39,097 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,097 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:41:39,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:39,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:39,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:39,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:39,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:39,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:39,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:39,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:39,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:39,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:39,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:39,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:41:39,126 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,128 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:41:39,129 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,129 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:41:39,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:39,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:39,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:39,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-13 01:41:39,142 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-13 01:41:39,143 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,144 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-13 01:41:39,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:39,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:39,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,150 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-13 01:41:39,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:41:39,152 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:129, output treesize:103 [2021-11-13 01:41:39,155 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-11-13 01:41:39,157 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:39,158 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,158 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-13 01:41:39,160 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-13 01:41:39,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:39,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-13 01:41:39,170 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,171 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 01:41:39,172 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,172 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 01:41:39,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:39,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:39,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,178 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,179 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-13 01:41:39,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:41:39,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:124, output treesize:116 [2021-11-13 01:41:39,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:39,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:39,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:39,217 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,221 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:39,224 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,227 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 223 [2021-11-13 01:41:39,230 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:39,232 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,233 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:39,234 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,234 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-13 01:41:39,235 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:39,236 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,236 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:41:39,239 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 263 [2021-11-13 01:41:39,239 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:39,242 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,244 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 242 [2021-11-13 01:41:39,247 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 300 [2021-11-13 01:41:39,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:39,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2021-11-13 01:41:39,263 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,264 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-13 01:41:39,265 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,265 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-13 01:41:39,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:39,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:39,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2021-11-13 01:41:39,276 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,278 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-13 01:41:39,278 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,279 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-13 01:41:39,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:39,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:39,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,307 INFO L180 QuantifierPusher]: treesize reduction 92, result has 74.1 percent of original size [2021-11-13 01:41:39,309 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 263 [2021-11-13 01:41:39,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-13 01:41:39,311 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:371, output treesize:263 [2021-11-13 01:41:39,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:39,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:39,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:39,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:39,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:39,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:39,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:39,348 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-13 01:41:39,350 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:39,350 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,351 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-13 01:41:39,351 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-11-13 01:41:39,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-13 01:41:39,357 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,358 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-13 01:41:39,358 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,359 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-13 01:41:39,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:39,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:39,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,362 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:39,363 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-13 01:41:39,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:41:39,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:56 [2021-11-13 01:41:39,367 INFO L180 QuantifierPusher]: treesize reduction 34, result has 52.8 percent of original size [2021-11-13 01:41:39,369 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-13 01:41:39,372 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:41:39,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:41:39,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:41:39,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2021-11-13 01:41:39,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35034031] [2021-11-13 01:41:39,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:41:39,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-13 01:41:39,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:41:39,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-13 01:41:39,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4955, Invalid=5145, Unknown=0, NotChecked=0, Total=10100 [2021-11-13 01:41:39,588 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:41:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:41,320 INFO L93 Difference]: Finished difference Result 572 states and 621 transitions. [2021-11-13 01:41:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-13 01:41:41,321 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 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 51 [2021-11-13 01:41:41,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:41,325 INFO L225 Difference]: With dead ends: 572 [2021-11-13 01:41:41,325 INFO L226 Difference]: Without dead ends: 567 [2021-11-13 01:41:41,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4955, Invalid=5145, Unknown=0, NotChecked=0, Total=10100 [2021-11-13 01:41:41,330 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 1756 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 321.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.91ms SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 419.31ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:41,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1756 Valid, 285 Invalid, 785 Unknown, 0 Unchecked, 11.91ms Time], IncrementalHoareTripleChecker [496 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 419.31ms Time] [2021-11-13 01:41:41,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-13 01:41:41,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 101. [2021-11-13 01:41:41,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:41:41,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-11-13 01:41:41,346 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 51 [2021-11-13 01:41:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:41,347 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-11-13 01:41:41,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:41:41,348 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-11-13 01:41:41,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-13 01:41:41,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:41,351 INFO L514 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1] [2021-11-13 01:41:41,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:41,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-13 01:41:41,565 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:41,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:41,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1662184682, now seen corresponding path program 6 times [2021-11-13 01:41:41,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:41:41,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225419429] [2021-11-13 01:41:41,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:41,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:41:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:44,929 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:41:44,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225419429] [2021-11-13 01:41:44,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225419429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:44,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343345760] [2021-11-13 01:41:44,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 01:41:44,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:41:44,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:41:44,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:41:44,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 01:41:45,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 01:41:45,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:41:45,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-13 01:41:45,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:45,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:54,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343345760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:41:54,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1417403845] [2021-11-13 01:41:54,456 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-13 01:41:54,457 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:41:54,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:41:54,457 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:41:54,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:41:54,476 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,477 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:54,477 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,478 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:41:54,479 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:54,479 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,479 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-13 01:41:54,480 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:54,481 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,481 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:41:54,482 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-13 01:41:54,485 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 21=[|v_#valid_15|]} [2021-11-13 01:41:54,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:54,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:54,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:54,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:41:54,501 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,502 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:41:54,502 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,502 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:41:54,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:54,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:54,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:54,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:54,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:54,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:54,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:54,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:54,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:54,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:54,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:54,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:41:54,528 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,530 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:41:54,530 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,531 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:41:54,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:54,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:54,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:54,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-13 01:41:54,542 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,543 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-13 01:41:54,543 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,544 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-13 01:41:54,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:54,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:54,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,549 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,550 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-13 01:41:54,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:41:54,551 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:129, output treesize:103 [2021-11-13 01:41:54,553 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-11-13 01:41:54,555 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:54,556 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,556 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-13 01:41:54,558 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-13 01:41:54,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:54,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-13 01:41:54,567 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,568 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 01:41:54,568 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,569 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 01:41:54,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:54,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:54,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,574 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,575 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-13 01:41:54,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:41:54,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:126, output treesize:118 [2021-11-13 01:41:54,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:54,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:54,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:54,609 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,613 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:54,615 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,618 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 223 [2021-11-13 01:41:54,621 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:54,623 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,624 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:54,625 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,625 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:41:54,626 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:54,626 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,627 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-13 01:41:54,629 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 263 [2021-11-13 01:41:54,630 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:54,631 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,633 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 242 [2021-11-13 01:41:54,636 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 300 [2021-11-13 01:41:54,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:54,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2021-11-13 01:41:54,652 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,653 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-13 01:41:54,653 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-13 01:41:54,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:54,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:54,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2021-11-13 01:41:54,664 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,665 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-13 01:41:54,666 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,666 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-13 01:41:54,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:54,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:54,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,691 INFO L180 QuantifierPusher]: treesize reduction 92, result has 74.1 percent of original size [2021-11-13 01:41:54,693 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 263 [2021-11-13 01:41:54,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-13 01:41:54,694 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:371, output treesize:263 [2021-11-13 01:41:54,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:54,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:54,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:54,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:54,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:54,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:54,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:54,728 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-13 01:41:54,730 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:41:54,730 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,730 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:41:54,731 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-11-13 01:41:54,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-13 01:41:54,737 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,738 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:41:54,738 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,739 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:41:54,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:41:54,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:41:54,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,741 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:41:54,742 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-13 01:41:54,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:41:54,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:54 [2021-11-13 01:41:54,746 INFO L180 QuantifierPusher]: treesize reduction 34, result has 52.8 percent of original size [2021-11-13 01:41:54,747 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-13 01:41:54,750 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:41:55,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:41:55,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:41:55,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2021-11-13 01:41:55,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214035440] [2021-11-13 01:41:55,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:41:55,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-13 01:41:55,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:41:55,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-13 01:41:55,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19115, Invalid=19497, Unknown=0, NotChecked=0, Total=38612 [2021-11-13 01:41:55,017 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:42:11,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:42:11,068 INFO L93 Difference]: Finished difference Result 1148 states and 1245 transitions. [2021-11-13 01:42:11,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-13 01:42:11,068 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 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 99 [2021-11-13 01:42:11,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:42:11,075 INFO L225 Difference]: With dead ends: 1148 [2021-11-13 01:42:11,075 INFO L226 Difference]: Without dead ends: 1143 [2021-11-13 01:42:11,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=19115, Invalid=19497, Unknown=0, NotChecked=0, Total=38612 [2021-11-13 01:42:11,080 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3064 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 867 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 614.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3064 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.34ms SdHoareTripleChecker+Time, 867 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 844.25ms IncrementalHoareTripleChecker+Time [2021-11-13 01:42:11,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3064 Valid, 570 Invalid, 1441 Unknown, 0 Unchecked, 22.34ms Time], IncrementalHoareTripleChecker [867 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 844.25ms Time] [2021-11-13 01:42:11,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-11-13 01:42:11,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 197. [2021-11-13 01:42:11,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:42:11,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2021-11-13 01:42:11,105 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 99 [2021-11-13 01:42:11,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:42:11,105 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2021-11-13 01:42:11,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:42:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2021-11-13 01:42:11,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-13 01:42:11,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:42:11,116 INFO L514 BasicCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1] [2021-11-13 01:42:11,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-13 01:42:11,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:42:11,329 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:42:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:42:11,330 INFO L85 PathProgramCache]: Analyzing trace with hash 197623574, now seen corresponding path program 7 times [2021-11-13 01:42:11,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:42:11,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518831016] [2021-11-13 01:42:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:42:11,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:42:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:42:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:42:23,456 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:42:23,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518831016] [2021-11-13 01:42:23,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518831016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:42:23,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742367760] [2021-11-13 01:42:23,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 01:42:23,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:42:23,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:42:23,457 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:42:23,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 01:42:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:42:23,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1569 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-13 01:42:23,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:42:24,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:42:59,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742367760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:42:59,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [732486399] [2021-11-13 01:42:59,781 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-13 01:42:59,781 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:42:59,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:42:59,781 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:42:59,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:42:59,785 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,786 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:42:59,786 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,786 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-13 01:42:59,787 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:42:59,787 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,787 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:42:59,788 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:42:59,806 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,807 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:42:59,808 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-13 01:42:59,810 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_15|], 21=[|v_#valid_16|]} [2021-11-13 01:42:59,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:59,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:59,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:59,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:42:59,820 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,820 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:42:59,821 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,822 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:42:59,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:42:59,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:42:59,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:59,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:59,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:59,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:59,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:59,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:59,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:59,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:59,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:59,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:42:59,841 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,843 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:42:59,844 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,844 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:42:59,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:42:59,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:42:59,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:59,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-13 01:42:59,881 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,882 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-13 01:42:59,883 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,884 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-13 01:42:59,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 01:42:59,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:42:59,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,888 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,889 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-13 01:42:59,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:42:59,889 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:129, output treesize:103 [2021-11-13 01:42:59,891 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-11-13 01:42:59,893 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:42:59,894 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,894 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-13 01:42:59,896 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-13 01:42:59,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:59,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-13 01:42:59,904 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,905 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 01:42:59,906 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,906 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-13 01:42:59,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:42:59,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:42:59,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,911 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,912 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-13 01:42:59,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:42:59,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:126, output treesize:118 [2021-11-13 01:42:59,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:42:59,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:42:59,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:42:59,953 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,957 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:42:59,959 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,962 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 223 [2021-11-13 01:42:59,965 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:42:59,967 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,968 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:42:59,969 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,969 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-13 01:42:59,970 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:42:59,971 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,971 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:42:59,974 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 263 [2021-11-13 01:42:59,974 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:42:59,976 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:59,978 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 242 [2021-11-13 01:42:59,981 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 300 [2021-11-13 01:42:59,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:00,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2021-11-13 01:43:00,004 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:43:00,005 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-13 01:43:00,006 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:43:00,006 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-13 01:43:00,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:43:00,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:00,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2021-11-13 01:43:00,017 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:43:00,018 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-13 01:43:00,020 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:43:00,020 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-13 01:43:00,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:43:00,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:43:00,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:43:00,046 INFO L180 QuantifierPusher]: treesize reduction 92, result has 74.1 percent of original size [2021-11-13 01:43:00,049 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 263 [2021-11-13 01:43:00,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-13 01:43:00,050 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:371, output treesize:263 [2021-11-13 01:43:00,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:43:00,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:43:00,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:43:00,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:43:00,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:43:00,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:43:00,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:43:00,084 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-13 01:43:00,085 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:43:00,086 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:43:00,086 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:43:00,087 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-11-13 01:43:00,092 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 16 treesize of output 12 [2021-11-13 01:43:00,093 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:43:00,093 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:43:00,093 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:43:00,094 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:43:00,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:43:00,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:43:00,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:43:00,097 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:43:00,097 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-13 01:43:00,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:43:00,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:54 [2021-11-13 01:43:00,102 INFO L180 QuantifierPusher]: treesize reduction 34, result has 52.8 percent of original size [2021-11-13 01:43:00,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-13 01:43:00,106 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:43:00,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:43:00,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:43:00,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2021-11-13 01:43:00,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181218519] [2021-11-13 01:43:00,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:43:00,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2021-11-13 01:43:00,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:43:00,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2021-11-13 01:43:00,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75083, Invalid=75849, Unknown=0, NotChecked=0, Total=150932 [2021-11-13 01:43:00,444 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:47:31,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:47:31,233 INFO L93 Difference]: Finished difference Result 2300 states and 2493 transitions. [2021-11-13 01:47:31,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-13 01:47:31,234 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 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 195 [2021-11-13 01:47:31,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:47:31,247 INFO L225 Difference]: With dead ends: 2300 [2021-11-13 01:47:31,247 INFO L226 Difference]: Without dead ends: 2295 [2021-11-13 01:47:31,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=75083, Invalid=75849, Unknown=0, NotChecked=0, Total=150932 [2021-11-13 01:47:31,260 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 8664 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 2364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1413.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8664 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 3514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 61.62ms SdHoareTripleChecker+Time, 2364 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1884.20ms IncrementalHoareTripleChecker+Time [2021-11-13 01:47:31,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8664 Valid, 1146 Invalid, 3514 Unknown, 0 Unchecked, 61.62ms Time], IncrementalHoareTripleChecker [2364 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 1884.20ms Time] [2021-11-13 01:47:31,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-11-13 01:47:31,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 389. [2021-11-13 01:47:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0051546391752577) internal successors, (390), 388 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:47:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 390 transitions. [2021-11-13 01:47:31,300 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 390 transitions. Word has length 195 [2021-11-13 01:47:31,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:47:31,300 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 390 transitions. [2021-11-13 01:47:31,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:47:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 390 transitions. [2021-11-13 01:47:31,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-11-13 01:47:31,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:47:31,311 INFO L514 BasicCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1] [2021-11-13 01:47:31,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:47:31,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-11-13 01:47:31,525 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:47:31,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:47:31,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1598838550, now seen corresponding path program 8 times [2021-11-13 01:47:31,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:47:31,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065456327] [2021-11-13 01:47:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:47:31,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:47:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:48:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:48:20,460 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:48:20,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065456327] [2021-11-13 01:48:20,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065456327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:48:20,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137841936] [2021-11-13 01:48:20,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:48:20,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:48:20,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:48:20,465 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:48:20,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5883f0b2-7e71-4994-b2ac-5d36d265c8c3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process